During All my Testing, It has become apparent to me that even though I am using Two 1600W PSU's dedicated to only the Four KPE's, I am still having problems going higher than 1.35v on the Graphics Card GPU's when trying to push Them Harder, So I think I'm going to try Two MORE PSU's and have a dedicated PSU for Each Card! (Looks like I'll be paying Higher Electric Bills Again. LOL!)
 
The present Two Rosewill 1600W PSU's I'm using have a Single Rail rated at 110A Each, But since I can't find any more of these units (i.e., Backordered/Not in Stock, etc...) I went ahead and bought Two Corsair AX1200i's that are Single Rail rated at 100A Each which as I have been advised in previous Posts/PM's/Discussions I need in order to Maximize the available Power when Pushing the OC'ing Limits.
 
Regardless of the Results that are achieved with using Four PSU's, I'll at least have ample PSU's available for practically Any Future Rigs that I Build!
 
     
 
 
  

Thanks Gomez99,
 
It may look like Massive Overkill to those who are Not into High-End Overclocking/Benchmarking, But Since I have Continuously been modifying/experimenting with my current Rig, This is but One of the Many Reasons I don't/can't have All my Components in a completely "Enclosed" Case. 

LOL, Thanks Dave, Power Demands have come a Long Way since back when I thought My Thermaltake Toughpower 1200W was "More than you Needed" to handle All the Overclocking/Benching Loads.
 
Just Like I did in My Original "Get it Colder" Thread, The Only way to Push Component Limits is to Continually Experiment with Non-Standard Methods.
 
From All that I have Heard/Read/Seen, If Your going to REALLY Push KPE's upwards to 1.5Vcore +, You are going to Need at the Very Least Four Dedicated Single-Rail PSU's for the 4X KPE's.

ATM I have the Two Rosewill 1600W Psu's jumpered at the 24-pin with My Thermaltake 1200W so that All three PSU's come on when I Hit the power button on the ASUS RIV BE, Which I'll be doing more of the same when I add the Two Corsair PSU's.
 

EVGATech_DaveB
And the million dollar question is, how long until you hit your wall of clocking you can do at normal temps and crank up that chiller.    Never forget what thread this is

Right Now the Vapo is -35C while at 5.185GHz and the KPE's are around 18 - 20C with 65F Water Temps on the Chiller (While at Idle in the Windows Screen). 
 
If I Don't Trip my House Electrical Panel Breakers after I add the other PSU's, I'll try Lowering the Chiller Temps More...........But You can Rest Assured that I will NEVER Forget What This Thread is All About!
 

 
 
 
 

EVGATech_DaveB
Oh ok, I must have missed you going back to subzero on the cards, way cool.
What are you running your system ram at now, 2666, or did you push past that?  I know RAM speed can help PhysX performance/tests as well as some CPU tests, as I recall, we are using the same RAM.  I saw 3dMark say 1333, wasn't sure if it was accurate.
 
Also, curious if you have a pic of this monster, I love seeing the huge OC benching setups :D
 
Glad to hear you will always remember what this thread is about. 

Well, The Cards aren't running at Sub-Zero Yet. They are running between 18C and 20C (64F to 68F) right now.
The G-Skill DDR3 2666 modules are running at 2709 in the ASUS BIOS even though CPU-Z shows them at 1354.
 
Here's a Few Quick Pics as of Today, But Remember, this is ALWAYS Changing.........
 

 

Houston, We Have Encountered a Problem..........
 
Apparently, After all the Time involved in connecting/arranging these Corsair AX1200i PSU's to My System, They will NOT operate in a tandem fashion like My Rosewill Hercules 1600W's due to the New "Digitally Controlled" Circuitry incorporated in the Units!
 
The Only GOOD News is that After I called Corsair to Verify this Problem and they Agreed that the AX1200i PSU's will Not Work in a Tandem arrangement, I called Newegg for an RMA and to My surprise they issued a Full Refund WITHOUT a Restocking Fee!
 
And so Now it's back to searching for Two more Rosewill 1600W PSU's once again before I can continue with my Testing.........

Thanks Halo,
There are Not a Lot of High Wattage/100A+ Single-Rail PSU's out there (and in Stock) that will Operate in the Parameters I need, But I'll find a Pair Somewhere sooner or later!  

Thanks sgtharry, I Appreciate the Info.
 
I've seen the EVGA 1300 G2 available at Microcenter and have been debating about using Them (Mainly Gun-Shy after all the problems I just had with the Corsair's).
For Now, On top of searching for the Rosewill 1600W's that I KNOW work in a tandem arrangement, My Next step is to find at least Two of the EVGA SuperNOVA NEX1500's (Either New or Used) that I have definitely seen working in K|ngp|n's Quad SLI Rig that used Four of Those PSU's.

sgtharry
EVGA is coming out with a 1600 watt version soon. I guess the Supernova 1500's are hit and miss, as far as being "working" when you get them.

Well, Today is Only April 2nd, So being realistic, I probably have more than Two Months to search for the other PSU's before EVGA releases their New 1600W.
 
It seems like there is Always a Least ONE Component needed that You either can't find, is discontinued or Nobody has any in Stock!

Hallowen,
ok first off, I misread that hyphen as a negative for the temp on your water for KPE's.
 
Next, for the power concern, the 1300G2 does not have the digital circuitry that the 1200i does, so it should work fine in parallel.  I checked with MikeF as well, and he confirmed he knows one who is already doing it.
 
So, you add in 2 1300G2's and be good to go.
 

oops, Sorry, Double Post.....

In Regards to the EVGA EVBot, I have to tell You that using it to control the Four KPE's is MUCH Easier than the Classy Tool Software Method, Also I Think (But I'm Not Completely Positive with just One EVBot) You can change the Settings on All Four Cards While You are running the Benchmarks (I now see Why EVGA was forced to Discontinued it!)
 
With the 780i31.zip Firmware installed for the KPE's, I can control all the parameters INCLUDING Overvolt Protection settings of Normal/High/Extreme.
 
I'm Still Playing with the settings I want, But Here's a Pic of it attached to My KPE's AND a Video I Found on Youtube of the Firmware Menu on the EVBot I have.
 
Note that although it Dosen't show you on the Video, All of the Shown parameters are Adjustable!
 

 
 
 
http://www.youtube.com/wa...eature=player_embedded
 
 
 
 
 
 

Got Position #9......
 
http://www.3dmark.com/3dm/2809766
 

 
http://www.3dmark.com/3dm/2810361
 

While waiting for the New PSU's, I was Looking on Ebay and found some 16GB (4 x 4GB) G-Skill Trident X DDR3 2666MHz Memory to replace the 32GB (4 x 8GB) G-Skill Memory I'm using now that hopefully should place less of a burden on the 4930K IMC to get Higher OC's.