I'll start my post off by saying this EVGA products are awesome, it's a love/hate relationship sometimes but overall after 6+ years they still work.
 
Now my current rig.
CPU: i7 920------
Mobo: x58 classified E760    5 years of usage 1x RMA due to DOA
Ram: 12 gb Corsair Domniators 6x(2gb)
        Corsair Dominators 6gb (3x2gb) CMP6GX3M3A1600C8
        Corsair Dominators 6gb (3x2gb) TR3X6G1600C8D
GPU: EVGA GTX 770      Recently bought less than 2 months
HDDS: OCZ Vertex series going on 5 years of usage. 
           Western Digital 150gb Raptor (5 years of usage)  1x RMA died after a year was sent another after rma.
           Seagate 2 tb 
Cooling
Cooler: Heatkiller 2.0 on/off for about 2 years
Mosfet: Bitspower same as heatkiller
mobo: Bitspower evga classified x58 mobo block  On/Off for about 2 years because of issues with mobo
XSPC 480 quad rad used on/off about 2 years 
Most recent: Cooler Master Hyper 212 evo  used less than 2 months
 
Previous GPU's: 
EVGA GTX 295 Co-op edition  
RMA'd Due to capacitors blowing after a year of usage, EVGA was kind enough to send me a brand new.....
EVGA GTX 480 Used for over 4+ years 
 
OS:
Windows 7 Ultimate 64 bit
Case:
Silverstone TJ07
 
Well here's my story... When I 1st decided to build this rig 5 years ago I got the best stuff for it's current time. I was like an excited little boy on Christmas!
ON air I was able to push the 920 to about 3.4GHZ, until I moved to watercooling, in which I could push it towards 3.8-3.9GHZ but was too unstable so I decided to keep it
at 3.4ghz on watercooling for about 2 years. Eventually my GTX 295 crapped out on me after about a year and a half of usage and EVGA sent me a brand new
GTX 480! Thanks EVGA!!!
 
Everything ran smooth for 3+ years. 
Until about 2 months ago.......
 
I recently purchased an EVGA GTX 770 because I figured it's time for an upgrade! I also needed to clean out the system so I decided to remove the watercooling and go back to air.
After installing the new GPU.....
Problems:
My mobo now only recognizes 8gb out of 12gb. I've spent over a month now, researching and trying to figure out why? 
I've reseated the CPU cooler/Northbridge/Southbridge cooler. Checked for bent pins. Moved Ram to different slots. Manually set timings. Have tried switching from STD to XMP profile nothing changes.
24 hours of memtest 10 passes no errors :( 
tested each individual RAM slot/RAM module. They all seem to work! But when plugged in together, The OS only see's 7.99gb out of 12gb's.
 
So I decide, Maybe it's the OS. Time for a fresh install anyways...... worst decision i've made.....
 
After the fresh install on the OCZ vertex. VIOLA! ALL 12 GB's! for a while.....
Installing on AHCI.... Everytime I boot to desktop... BSOD! checked the minidump files nvstream.dll.... changed drivers... still BSOD's on AHCI. 
Change to IDE no BSOD... but now I can't install windows updates.... Error codes 0x80070570..
After installing windows FixIt! OS hangs.... Oh then boot into safe mode 7.99gb out of 12gb..... 
Then I install windows update readiness tool, the OS hangs over and over, if I switch to AHCI, I get a BSOD, 
 
Switching any of the HDD's to Sata port 0 or 1 after about an hour or two, I get a BSOD (A crucial memory process has terminated) no Code. no minidump. I lose the Sata ports forcing me to reset CMOS.... 
Switched the SSD to the SCSI ports, boots to desktop after 10 minutes windows hangs, then I must do a hard reset, this is on both the SSD and Seagate drives. 
 
I decide maybe it's the hard drive... So I decide to do another fresh install on my Seagate.....
Same issues...
 
This isn't the 1st time I've gotten these over the past 5 years i've gotten maybe hundreds of BSOD's but i've been able to fix them all. But after installing the GTX 770, 
it seems I have encountered all types of issues.
 
So I guess at this point, I am maybe giving up, and on here asking for some advice. I can post all minidump files if needed. Thanks in advance. 
But also want to ask 
Should I bite the bullet and buy a new i7 -4790k  
or try to fix this and wait for DDR4!
 
TLDR: New GTX 770, BSOD, 

Thanks for the quick reply rjohnson11! 
 
I have tried that troubleshooting guide already. I've done every single step in the guide and non of them seem to work. 
If I switch the MCH strap to DRAM ratio, I lose even more ram it goes from 12gb's to 3.99gb usable. Switching the TRL to +2 also does the same thing.
I have also flashed to version 83 bios with the same results .
I have remounted the CPU cooler and have checked for bent pins, none found. Same results.
Increasing the memory low gap, I go from 12gb's to 3.99gbs.

Update: got my 12gigs back after resetting cmos but when trying to do windows updates I get error codes
8007003, 800B0100, 80070570
Googled what they were, deleted temporary update files (per link windows.microsoft.com/en-us/windows/windows-update-error-80070003#1TC=windows-7 )
 
Now I am stuck at a black screen after restart with a post code of 8d    =(
 
Post code 8d is a parity error, off to check if memory modules are compatible with mobo.... I have been using them for over 4+ years now so I do not think that's the issue but.... you never know.
 
it seems  Corsair Dominators 6gb (3x2gb) CMP6GX3M3A1600C8 are not part of the compatible memory modules according to this list evga.com/support/motherboard/legacy/

Have you tried going back to your previous working setup?

So the question of the day is!!!
 
Since I have all these issues with this setup. Should I go ahead save myself from all these problems and just go ahead and get me a new i7-4790k, with a  Z87 Classified? 
newegg.com/Product/Product.aspx?Item=N82E16819117369

Sounds more like the motherboard has started to lose functionality .... RMA it if possible. 
 
 

141-BL-E760-A1
 
It should have a lifetime warranty.