I've recently decided to tinker with solo mining because according to this Digitalcoin (DGC) should take about a 0.58 day (~14 hr, but SEE BELOW at how fast I'm finding blocks) to find a new block at my current 1400 khash/s rate with my two Titans.  And right now Digitalcoin is one of the highest valued at http://dustcoin.com/ (and has been for about a week).
 
I am new to solo mining (heck, still a mining newbie!); so, please post corrections and I'll update this how-to.
 
What is solo mining?  
Solo mining is using your system resources to mine for 1 single "block".  Once you find a "block", you are awarded XX number of coins in that currency for finding that block.  The "reward" is the the amount of coins that end up in your "wallet."
 
Ok, so what exactly is a "block"?
I am taking a guess (until I get confirmation); but, think about what exactly "mining" is using your system resources for.  It is to generate a cryptic hash string.  Here's an example of a real Litecoin hash:
 

adf6e2e56df692822f5e064a8b6404a05d67cccd64bc90f57f65b46805e9a54b

 
A single "block" is this hash wrapped in metadata.  That meta holds the information about the block.  Here's that same Litecoin hash above in the real block # 29255 of the Litecoin blockchain located here: https://litecoin.info/Scrypt#Example_dbdump_of_block_29255 
 

./dbdump.py --datadir=/home/mining/.litecoin/ --block 29255
Block height: 29255
BLOCK adf6e2e56df692822f5e064a8b6404a05d67cccd64bc90f57f65b46805e9a54b
Next block: 0000000000000000000000000000000000000000000000000000000000000000
Time: Wed Nov 9 16:15:52 2011 Nonce: 3562614017
nBits: 0x0x1d018ea7
hashMerkleRoot: 0x066b2a758399d5f19b5c6073d09b500d925982adc4b3edd352efe14667a8ca9f
Previous block: 279f6330ccbbb9103b9e3a5350765052081ddbae898f1ef6b8c64f3bcef715f6
1 transactions:
1 tx in, 1 out
TxIn: COIN GENERATED coinbase:04b217bb4e022309
TxOut: value: 50.000000 pubkey: 1HXG8MWvUFNU3pLpQUJueSC4kHcrNepuwC Script: 65:0448...b8cd CHECKSIG

Raw block header: 01000000f615f7ce3b4fc6b8f61e8f89aedb1d0852507650533a9e3b10b9bbcc30639f279fcaa86746e1ef52d3edb3c4ad8259920d509bd073605c9bf1d59983752a6b06b817bb4ea78e011d012d59d4

 
That information makes up the entire single "block" at the public address of  adf6e2e56df692822f5e064a8b6404a05d67cccd64bc90f57f65b46805e9a54b.
 
Mining is generating these raw hashes, as fast as possible, and comparing them to "known blocks" in the blockchain.  Known blocks is the public ledger for coin type that has been published.  The actual known hashes are not known, and that's the whole point of mining: to find them! You create a hash, and compare it to the public ledger in some additional hashing technique, including the difficulty factor.  If a match is found, bingo, you found a "block"!
 
Thinking about password cracking.  There is encryption of passwords and there are hashing of passwords.  What's the difference between encrypting and hashing?  Encryption is reversible if you have the encryption key; whereas, hashing is one-way and none-reversible.  The only way to find a hashed password is to brute-force attack a database.  You brute force by taking a string you think is a password, e.g. "MyPassword", and hashing it.  Then compare that hash to what is stored in the database.  If you find a matching hash, guess what, you know the password used before it was hashed.
 
Solo Mining is attempting to find those blocks on your own.  You iterate through as many hashes as possible until you find a "block".  Most coins can take a long time to find a block with their current difficulty.  Pool Hashing is the process of pooling your resources with others to find those blocks faster.  If you have 1000 people generating the same hash rate as you, chances are you will all find a block 1000x faster.
 
 
"Chances are" is an interesting statement.
You see, it is unknown in how long it will take you to find a block.  Your 2nd hash could be a match, or your 12th trillion hash could be a match.  That's the randomness and difficulty factor of it.  The difference is low difficulties make finding matches faster.  That's why most people pool their resources.
 
 
What are some of the risks?  
I've read a lot of warnings on solo mining, so note some cautions before taking on this adventure:

• You could spend all this time mining for a block, find a block, but it could be a duplicate of another block someone has already found.
• Or the block you find could be too stale to be accepted. E.g. you lose everything with it being "Rejected" or classified as "Stale."
• Most blocks are easiest to find at launch of a new coin.  After time, blocks become very difficult and time consuming to generate - e.g. "difficulty" levels.  
  • As an example, at my 1400 khash/s as of today, it would take me about 9 days to find 1 block of Dogecoin.  Much slow.
  • It would take me a little over 6 months to find 1 single Litecoin block solo mining - which may be invalid by then.  
  • It would also take me about 3 years to get 1 block of bitcoin, which would be 25 coins at the current reward.  But still, 3 years!
• If you don't finish a block, all that time mining is wasted electrical costs.  For example, say you are able to estimate mining a block in about 22 days.  You start and you are up and down, playing games, rebooting, studying for school, etc.  You've spent about $15 in electrical costs so far.  That's it, you've lost it.

 
What are the advantages then?
In a word: rewards.  The rewards, as mentioned above, are the amount of coins awarded when a block has been completed and accepted. 
 
You will see this in your log you when complete a single block:
 

[2014-01-07 17:34:51] GPU #1: GeForce GTX TITAN, 2983680 hashes, 592.57 khash/s
[2014-01-07 17:34:51] GPU #0: GeForce GTX TITAN, 3212160 hashes, 649.43 khash/s
[2014-01-07 17:34:54] GPU #0: GeForce GTX TITAN, 1545600 hashes, 636.70 khash/s
[2014-01-07 17:34:54] accepted: 1/1 (100.00%), 1229 khash/s (yay!!!)
[2014-01-07 17:34:56] GPU #1: GeForce GTX TITAN, 2970240 hashes, 595.12 khash/s
[2014-01-07 17:34:59] GPU #0: GeForce GTX TITAN, 3185280 hashes, 644.39 khash/s
[2014-01-07 17:35:01] GPU #1: GeForce GTX TITAN, 2983680 hashes, 594.58 khash/s
 
^- I was eagerly awaiting mine all day since all I got were hashes.  BAM, got my first Digitalcoin and 15.10 coins in my wallet!
 
There are also other advantages I am noticing:

• Less network traffic.  You are mining directly against your local machine, not connecting to an external pool.  (Does anyone know if this works offline, or with intermediate connectivity?)
• No "DoS" attacks against the pools.  This is your local machine, do as you wish.
• Want to fall back?  No problem, setup a DOS batch or linux shell script to loop after a timeout - to retry your own wallet.  Or, setup multiple different wallets in case your main wallet app crashes.  (I am not sure what happens if you have multiple copies of the same wallet open across different machines.  Does your mining 'transfer' over to the other one?  I wouldn't think so, since only "blocks" gets submitted/transferred."
• You aren't sharing the awards with other users - especially VARIABLE pools that give slight advantages to lower-hashing users (less than 500 khash/s from what I've been seeing).  It's a bunch of voodoo and hard to know exactly what the pool is doing (though I am sure most can be trusted).  
• No pool fees - you are your own pool!
• You also get a cool "mining" icon instead of a coin icon in your wallet, like this:

 
 
How do you estimate how long it would take to mine a single block?
This is hard to figure out with fluctionations in the difficulty, the risks stated above, etc.  It can vary greatly.  
 
I basically used www.coinwarz.com to estimate that at my 1400 khash/s scrypt rate, I could find a single block of DGC coin every 0.58 day at the time of this posting (welll, 8 hours ago when I started).  That's a single block every ~14hr or so.
 
I also wrote a quick javascript snippet for those that want to see the math and run it yourself:
 
http://jsfiddle.net/eduncan911/UXJR5/ 
 
^- update this to the difficulty factor of whatever coin you are interested in, and your khash rate.  Use www.coinwarz.com to find the difficulty as they list just about everyone.
 
Well, that's a rough estimate and can vary greatly.  So....
 
 
What were your results Eric?
Again, take this with a grain of salt because of the risks noted above.  I just started solo mining this morning and have found my first two blocks!
 
[2014-01-07 10:15:06] 2 miner threads started, using 'scrypt' algorithm.
[2014-01-07 17:34:54] accepted: 1/1 (100.00%), 1229 khash/s (yay!!!)
[2014-01-07 20:25:03] accepted: 2/2 (100.00%), 1206 khash/s (yay!!!)
 
Notice that I found my first block in just over 7 hours?  And then a 2nd one just shy of 3 hours later!  Not 14 hours that was originally estimated, but just 7 hours and then 3!  I'll leave it going and will come back to update this post.  But, at this rate, I'm on target to earn 55 coins in a 24hr period, not 28 coins as estimated by other DGC pools and coinwarz.com.  
 
Uh, that's a serious advantage to solo mining!  I am sitting on 30.10 DGC right now, which is worth 0.01184313 or $~10 USD at the time of this update ($881 BTC).  At this rate, I might clear $25 or $30 worth in a single day!  Not bad for a couple of Titans.  Man I want my 7990s to get here fast!
 
I'll tell you what though.  The first, or maybe second rejection I get (if any) will quickly put me off of solo mining and I'll be back to pooling.  
 
 
What should you do then?
Basically, you want to join a pool and mine there.  That's first and foremost the best advice because the pool shares the risks noted above (stales, rejections, etc).  Pool mining finds several blocks quickly, and depending on their hashrate, could dish out rewards several times a day.  Pool mining also usually accepts your mining quickly, like several per minute.  You can spin up and shut down as often as you want, with credit given on just your short time mining.  
 
Only if a coin comes along, or if one is launching soon (like Kanye West Coin, lol), or if a coin has a very short block finding rate, would solo mining be interesting for the reward.  
 
Basically, it's a gamble.  You are gambling you can find blocks faster than the estimated difficulty factor of the coin, before it ramps up the difficulty.  So, I will be gambling that I can find digitalcoins faster than the 0.58 day (14hr) estimate of my hashrate and current difficulty factor.
 
 
Ok, thanks for the info... Shut up and tell me how do you setup solo mine then!
This is not a completely guide.  I am only going to mention a Windows method for right now.  When I get my linux boxes up, I'll update the guide on how to do it on Linux.  But no matter the platform, the basics are this:

• Setup a Wallet, open the wallet, and keep it running on the desired machine.  
  • Most wallet software is also a "Server"!  Yep, it opens a port and lets you mine directly against the wallet - especially these Wallet-QT bitcoin wallet clones that the Alt coins are using (Dogecoin-qt, Litecoin-qt, Digitalcoin-qt, etc).  
  • It takes a little special configuration file to configure a Wallet to act as a server.  See below.
• Configure your miner (cgminer, cudaminer, etc) to talk to your Wallet's IP address (or if on the same machine, localhost or 127.0.0.1).

Optionally, most of these -QT wallet windows applications also lets you CPU mine.  I am not going to cover that in this How To.
 
 
Step 1. Download a Wallet application and set it up normally with an address.  Every coin has a nice Introduction webpage instructing you on how to download their wallet, and how to set it up.  Make sure to Encrypt it!
 
Step 2. Close the Wallet app, and edit the conf file.  The default location is in the C:\Users\[username]\AppData\Roaming\[Wallet_name]\ directory.  For example:
 
C:\Users\Eric\AppData\Roaming\Digitalcoin\digitalcoin.conf
 
It should be there already.  If not, you may want to grab the one that was included in the ZIP file of your wallet. b If there wasn't one included with your Wallet (e.g. 66 Coin), then  you can just create one called "Wallet executable".exe.  For example, for 66 Coin, call it:
 
Digitalcoin.exe's config file is: digitalcoin.conf
66.exe's config file is: 66.conf
 
Do note that the config file MUST be in the directory listed above in the Roaming part.  That's the only place it is read from.  Technically, newer versions/distros of these wallet apps will let you change this location.  I don't support this in this How To as that is an advanced topic using command line parameters.
 
Step 3. Enter these values in that conf file.  Make sure they only appear once.  Do not delete anything already in the conf file:
 
listen=1
daemon=1
server=1
rpcuser=james
rpcpassword=dean
rpcport=3333
rpcconnect=127.0.0.1
rpcallowip=172.16.*.*
 
rpcuser and rpcpassword can be anything.  Do note that it is transmitted over clear text over your local network.  So don't use something too cryptik.  Heck, if someone does guess your username/password, why not let them mine coins for you!  
 
rcpallowip isn't really needed from what I read, but I put mine there anyways with my IP mask.  I do plan on using more machines to connect to it (making sure the firewall port is open for 3333).
 
I think rpcconnect is the IP address to bind to.  I'm guessing, and I'll find out later when I try to use multiple machines.  If so, then you want to set this to your actual IP address.  Or, I think you can even omit the entire rpcconnect and it may bind to all IPs (I think that's what I read in the readme).  I only have it as that's what everyone else had.
 
Step 4. Create a new shortcut to your Wallet application executable.  You can right-click on digitalcoin.exe, select Send To, and click Desktop (shortcut).  This creates a shortcut on your desktop (in which you can add to your Taskbar (Win7/8) and Start Menu (Win8) later by right-clicking that shortcut on your desktop).  Name this shortcut "Digitalcoin (Server)"
 
You need to right-click that shortcut on your desktop, goto Properties, and at the end of the TARGET, you need to enter -server.  Like this:
 
"C:\Users\Eric\Google Drive\Program Files\Digitalcoin\digitalcoin-qt.exe" -server
 
^- Note, your application will be unzipped to a different directly.  This is specific to my machine, where I use Google Drive to share "portable" apps so I don't have to frack with setting them up multiple times across different machines.  This is NOT my AppData\Roaming folder either!
 
^- Note 2 that I originally had the digitalcoin.conf file here, at this location.  It didn't seem to be read or found.  I had to move it to the AppData\Roaming\digitalcoin\ folder for it to be seen!  You'll get the error as well if it is not there.
 
Step 5. Double-click the "Digitalcoin (Server)" shortcut, and let the Wallet open.  With the -server parameter, it must read the conf file - in which it will tell you if there are any errors.  Now, sit back and let the blocks sync before continuing.  I let it sync overnight, as I mined more Dogecoins in the fast-pool I was using.
 
Step 6. Last, but NOT least: change your miner(s) to point to your new Wallet!  If on the same machine, using cudaminer, that command line would look like:
 
C:\cudaminer-2013-12-18\x86\cudaminer -d 0,1 -i 0,0 -m 1,1 -l T14x30,T14x30 -H 1 -o localhost:3333 -O james:dean 2>> logfile.txt
 
^- that is the exact line I am running with my Titans.  You can ignore the options, and focus only on the -o and -O parts.
 
^- note, you may want to start logging your output.  You can do this with cudaminer with "2>> filename.txt".  Make sure the "2" is there next to the 2>>.  The author of cudaminer does some weird piping of printf and requires this type of redirect.
 
If you are using cgminer or alike, just change the stratum+tcp://host-name.com to "localhost:3333", that's all.  If it doesn't connect, try tcp or http like stratum+tcp://localhost:3333 or stratum+http://localhost:3333.  I haven't got my ATI machines up yet so I haven't used cgminer yet to know.
 
 
Felina. That's it, you are now mining!  
 
Again, heed the advice to lookup the estimated time to find a block for your coin of choice (e.g. at coinwarz.com).  I am only doing this with short times for blocks because I don't want to wait.  Mainly because starring at 100s of lines like these for hours...
 
[2014-01-07 15:21:17] GPU #1: GeForce GTX TITAN, 3494400 hashes, 695.86 khash/s
[2014-01-07 15:21:17] GPU #0: GeForce GTX TITAN, 3521280 hashes, 705.72 khash/s
[2014-01-07 15:21:22] GPU #1: GeForce GTX TITAN, 3480960 hashes, 696.22 khash/s
[2014-01-07 15:21:22] GPU #0: GeForce GTX TITAN, 3534720 hashes, 704.01 khash/s
[2014-01-07 15:21:27] GPU #1: GeForce GTX TITAN, 3494400 hashes, 695.44 khash/s
[2014-01-07 15:21:27] GPU #0: GeForce GTX TITAN, 3521280 hashes, 706.13 khash/s
[2014-01-07 15:21:32] GPU #1: GeForce GTX TITAN, 3480960 hashes, 691.75 khash/s
[2014-01-07 15:21:32] GPU #0: GeForce GTX TITAN, 3534720 hashes, 694.70 khash/s
[2014-01-07 15:21:37] GPU #1: GeForce GTX TITAN, 3467520 hashes, 694.09 khash/s
[2014-01-07 15:21:37] GPU #0: GeForce GTX TITAN, 3480960 hashes, 702.40 khash/s
[2014-01-07 15:21:42] GPU #1: GeForce GTX TITAN, 3480960 hashes, 694.84 khash/s
[2014-01-07 15:21:42] GPU #0: GeForce GTX TITAN, 3521280 hashes, 703.03 khash/s
[2014-01-07 15:21:47] GPU #1: GeForce GTX TITAN, 3480960 hashes, 695.93 khash/s
[2014-01-07 15:21:47] GPU #0: GeForce GTX TITAN, 3521280 hashes, 709.67 khash/s
 
...with no other feedback makes me weary.  I had to wait 7 hours to find my first block.  Nail biting, but it worked!
 
Enjoy and please donate if this helped you!
 
DGC: DNVSmmGSDkDbV6a6xQfNSSuTWASnKpGstf <- this is Digitalcoin
DOGE: D7cpuqwzgSu4VBrX8vhUo7t4SNC19NzEzr <- this is Dogecoin (confusing eh?)
LTC: LY9omkj3nncPDhM3TVbyru7hAwwUwuYuXJ
BTC: 16aoCMuo9XAGsPuKK9NL4xWr8B9fsSvMx
 
 

Yep finding blocks is much much slower in solo mining, sure you get the entire share to yourself but is it worth the time it takes to find them
 
where as when you are on a mining pool they are found faster but the share gets split between all the active members that mined that found block.

eduncan911

_Nite_
Yep finding blocks is much much slower in solo mining, sure you get the entire share to yourself but is it worth the time it takes to find them
 
where as when you are on a mining pool they are found faster but the share gets split between all the active members that mined that found block.

Yep. I mentioned those points in the OP.  
 
But right now, with Digitalcoin, I'm doing pretty damn well.  Already made $11-ish in 14 hours - where I was only supposed to make $6.  Dogecoin and Litecoin mining that I cashed out recently was right at about $8 to $9 USD for a single solid day of mining each.  Again, I'm at $11 for just 14 hours.
 
It's a risk, and I'll keep doing it until I see some type of big loss - then I may just move on back to pooling.  
 
The only reason I am doing it is because 1) the experience of solo mining and 2) Digitalcoin blocks can be had quickly in less than a day (so I'll get feedback as to if it is working or not - I don't want to wait an entire week).
 
With this experience of solo mining, I may try to jump on the Kanye West coin coming out next week.  LOL.  Who knows, he may actually promote it and it may spike for a quick sell off (they have been reaching out to him to get his endorsement).  

Apparently his lawyers issued a cease and decist letter against the programmers, so i doubt hell endorse it. 

ROMORC

eduncan911
 
With this experience of solo mining, I may try to jump on the Kanye West coin coming out next week.  LOL.  Who knows, he may actually promote it and it may spike for a quick sell off (they have been reaching out to him to get his endorsement).  

Apparently his lawyers issued a cease and decist letter against the programmers, so i doubt hell endorse it. 

Ah, I was wondering!
 
Heh, and they are launching tonight at 7 PM PST.  Wait, that's uh 1 hour ago.
 
http://coinyeco.in/
 
Think I'll skip it.  I can see the mad rush of coins, then law suits to bring down the wallet servers... End game.

This is an awesome guide on solo mining. I'm waiting for my wallet to sync before trying it. It hasn't synced at all yet. Did you have any problems with this? Might I recommend adding a donation address for digitalcoin? 

When I tried solo mining briefly this morning, the hashrates reported in cgminer were about 50kh/s less for each of my 280xs (650 vs 700) than they are when pool mining. Did you notice a decrease in hashrate when moving to solo mining? 

Well, I started out strong... Found 3 blocks in the first 13 hours where I was estimated to find 1 in 14 hours.  
 
It's now been a little over 12 hours since my last block found.  I'm still ahead of the game (actually if I don't find another block for 24 hours, I'll still break even); but, it looks like this is part of the gamble. 
 
 

ROMORC

eduncan911

ROMORC
When I tried solo mining briefly this morning, the hashrates reported in cgminer were about 50kh/s less for each of my 280xs (650 vs 700) than they are when pool mining. Did you notice a decrease in hashrate when moving to solo mining? 

I actually noticed an increase.  When I let it go full bore at night @ 100% fan, I'm seeing 1460 to 1490 khash/s.
 
Just a guess but what's your CPU the wallet is running on?  Mine is, uh, a little overkill (gaming system).  I am mining on that system.  See sig.    Maybe we need a kick-butt CPU to keep up with the hashing?  I have noticed a lot more CPU usage when mining compared to cudaminer when set with -H 1.

In the wallet itself, I had started the miner in the "mining" tab. Is that just a miner for the cpu and not actually necessary to mine on the GPUs? When I turn that off, my hash rates in cgminer go up, indicating that maybe I was overloading my 2600k.
 
Also, found my first block!

Haha!  That "mining" tab is just for the CPU!  (and wasn't in my OP purposely).  Hehehe... Yeah, that's why your hashing went down, your CPU was busy hashing as well.  
 
Though, I am curious to know what my 4.8 Ghz 12 thread 160 Bclk system could hash out. 

The multipools are kind of irritating. The hashrate keeps fluctuating between 1Gh/s and 4Gh/s because its the most profitable currency when the multipools aren't mining digitalcoin, but not when they aren't.

Equitum

ROMORC
The multipools are kind of irritating. The hashrate keeps fluctuating between 1Gh/s and 4Gh/s because its the most profitable currency when the multipools aren't mining digitalcoin, but not when they aren't.

That's one of the reasons I'm sticking to mining Dogecoin - it's still more profitable to mine than Litecoin, but the net hashrate doesn't vary as wildly as other coins (Cinnamoncoin, BBQCoin, Galaxycoin, Noirbits, Alphacoin, Casinocoin, and Spots seem to be the ones that fluctuate the most), so the difficulty, and therefore net daily profit, doesn't fluctuate like a slinky.

However, I still might try solo mining for a day for kicks and giggles, especially because the exchange rate for Doge/BTC has been getting lower and lower over the past week, which means I can't really cash out at the end of each day (0.01 BTC minimum transaction limit on Cryptsy being the limiting factor). I'm getting about the same hashrate on my 780 Ti Classy as eduncan is on one Titan, so it'll take me twice as long to find a block (or longer!), but I expect I'd find at least one a day, which is only a little less than what coinwarz estimates I would get from pool mining Digitalcoin.

If I read this right, you said you may try solo mining DOGE for a day?  The current DOGE difficulty (at the time of this post) is 249.43814211, not DGC's 13.21958334.  It is estimated, at 1400 khash/s, that I'd find a DOGE block in about 9 days.  So 1/2 that is 18 days to find a block.
 
Of course, it's a gamble and you could get lucky and find one in a few hours - or a few seconds.
 
Yeah, I'm happy to see the 780 Ti Classify do just as well.  I got my 780 Classified (non-Ti) up to 690 khash/s with a custom BIOS ; but, the wattage usage was unbelievable and less than 1 Mh/J.  The sweet spot seemed to be around 620 to 640 khash/s in the 780 Classified at 1320 Mhz.  
 
Then again, now that I understand the power of the Temp Target Unvolting trick discovered in this thread, I am going to take another crack at my 780 Classy to see how efficient I can make it.  Setting up a Linux box now just for it and my GTX 460 I have laying round.

Fyi, I undervolt everything - it saves the wattage.  The Titans are max undervolted, and it still was way too hot.  The trick I found was not to use the Power Target to limit temps because the PT makes the core speed jump way too much; but, instead to use the Temp Target to limit the temps.  The temp target is key because it seems to lower the GPU voltage EVEN FURTHER than I could lower it manually!
 
It looks like that is exactly what you are doing: take a look at your voltage: it should be around 1.135 or 1.175 at that core speed.  You are limiting it with the Temp Target.  I also didn't see any difference with memory overclocking.  Instead of +0.035V, lower it as far as it will go instead!  This should boost your core speed, as well as lowering your Power usage to stay away from the Power Target limit of the 115% of the stock LN2 bios.
 
I do have to make a note that with my 780 Classy, before I found this Temp Target trick, I could not undervolt it.  As a matter of fact, I had to use the CLassified controller to force 1.35V really hot wattage to get it to mine at 1380 and 1390 Mhz.  It was insanely hot, and pulled an insane amount of wattage (around 870 Watts from the wall, for a single GPU!).  I'm hoping it was just my frack up of not knowing how to undervolt properly or PrecisionX didn't take or something.  I'll try again.
 
Take a look at your graphs/monitor.  Look at the "Limit" values towards the bottom.  It should tell you what is limiting your GPU.  I am going a guess and say both the Power Target and Temp Target is limiting it (Temp Target on purpose at 75C, but Power Target getting in the way).
 
Flashing Skyn3t's BIOS will remove that Temp Limit, and let your core Mhz and Power usage run free!  Use the Temp Target, with fans set to manual of your liking, to limit the amount of khash the card is making.  I have my Titans set at 80C as that is what I am comfortable with.  The CLassified's VRms can take fare more abuse than my Titans, so set the guy at 85C.  
 
I control my overall khash/s with my fan speeds.  When I am in my office, like right now, I have them set to 80% because I can't bare the noise any higher (even at 80% with reference coolers, they are loud) for around 1250 khash/s.  When I step out, I increase them to 100% for about 1430 khash/s.  And I got rid of the ACX coolers from the Titans beause the heat dumping, even with the side panel off, made one card run way too hot.  Reference coolers, with high-end thermal pads and TIM, seem to actually give me the same performance as the ACX coolers did with their EVGA thermal pads and grease.  Just the noise is louder with reference coolers.
 
I use Afterburner for my overclocking because of 1 reason and 1 reason only: Precision X does not allow you to set the voltage in a stored profile (I have my machine set to auto start into mining and overclocking, undervolting at boot up).  It's sad too, because I really liked controlling my machine remotely with my Android.
 
 
 
 

Look at the bottom of Precision's window. See the Profile buttons? Those buttons are there because of the button to the left that says Profiles.

Instead, click the button that says "Performance Log". Now, in those graphs that appear, double click the graphs and be wow'd at what opens next.

Click the Profiles button again to return to profiles.

1) make sure u don't have both PrecisionX and Afterburner running.

2) for Afterburner, always get the Beta. Betas have the volt unlocking (and other api hacks likr LLC) for unofficial cards.

3) to unlock voltage, go into the settings and check the box. You may want to read how to use Afterburner for overclocking and voltage tuning.

There's also another app that I love for overclocking, undervolting: Nvidia Inspector. You can set desktop shortcuts that does the overclocking for you and it doesn't have to be running (think max bemchmarking). It just the graphs don't remember the settings and u always have to change them.

Afterburner Beta = bypasses Nvidia NDA agreements because it is "unofficial".

That's pretty awesome.
 
Man I am getting jealous of these 780 Ti cards now.  You're the 2nd to get consistent 720+ out of them (the other is a reference 780 Ti).  And your low temps is nice as well.  The other guy is using Temp Target to limit his Power usage to just under 112%, which downvolts the card as well.
 
Down-volting = less Power Target usage.  It's a direct 1:1 correlation.  If you can lower your voltage, you'll lower your Power usage and your Power Target will drop.
 
So, you may find success in that as well since you are hitting the 115% PT limit.  Use your Temp Target to lower your voltages even further.
 
Then again, with my 780 Classy it did NOT like any less voltage at all.  Maybe the 14 phase VRMs that the CLassifieds have really needs a lot of voltage to run them, opposed to the 6 phases the reference Titans and 780 Tis have.  
 
I am starting to think the reference cards are better for Mining now because of the VRM's lower power requirements.  Meaning, higher Mhash/j ratio and less Power usage.