8 gigs total (3.99 RAM usable)?

If you have an i7 why didn't you use triple channel memory? Buy a 12GB triple channel kit. That should do it.

I contacted EVGA and updated the BIOS, reseated the RAM and worked out every other alternative in the BIOS but yet the problem still remains. The EVGA rep. recommended that it is an OS issue. We ran multiple diagnostics to make sure it wasn't any faulty hardware but everything came out clean. I'm going to try EVGA again tonight and see if a different rep can think of a different solution(s). Is there any way I can get Windows 7 phone support without paying the ridiculous fee? I find that kind of shallow that Windows has to charge $60 for support for a product that I already paid $150.

Why don't you buy triple channel memory? It is an i7.

Frostmourne said:

Why don't you buy triple channel memory? It is an i7.

I just got off the phone with EVGA and they said that the RAM being Dual shouldn't have anything to do with the problem other than just speed. But he recommend that I try 2 sticks of RAM at a time to absolutely make sure it's nothing hardware, if that's not the case then he said I can return the board.

But yea I completely overlooked that issue of my RAM being Dual channel, other than just speed, how would this affect this situation?

I'm not up to par on Corsair's return policy, but I'm hoping it's like EVGA's where I can buy myself Corsair's Dominator and pay the difference.

Newegg.com - CORSAIR DOMINATOR 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory Model TR3X6G1600C8D - Desktop Memory

Hello All,

I spotted this very issue last night on my new rig.... 8 gigs installed, ( 3.99 usable ) displayed in My Computer - Properties

Funny thing was that I know it wasn't there before, and I had just completed some decent overclocking in the last few days.

I was able to correct this quickly by remembering something I read about when trying to select the proper DDR3 memory / motherboard combination.

The note basically stated that if you intended on filing up all your DIMMs.. in my case... 4... you would not be able to run the memory in dual channel, and Windows 7 64bit might have problems... so they recommend buying 2 huge Dimms.. which were too expensive for me... etc...

Short answer... the memory I purchased was 4x 2 Gig Corsair DIMMs rated at 1600MHz..... and my motherboard stated it could run DIMMS at 1600GHz without overclocking them... but...
THAT IS ASSUMING YOUR CPU IS RUNNING AT STOCK SPEEDS....
Same with XMP profiles... they assume you have stock CPU.

If you go in and slow down your BLCK and/or memory speed to slightly lower than your max NON-overclocked DIMM speed ( 1600 MHz in my case ).... viola...

I am now running my i5 750 at a very cool temperature at 3.83 GHz.... and my memory at 1573MHz ( lower than the 1600 stated limit for my motherboard)... and
after slowing the ram down a touch and booting back into Windows 7 64bit... no more problem....

Motherboard was limiting access to the DIMMS due to the 4 DIMMS in dual channel.

Hope this helps someone... I was happy to not have to abandon my overclocking achievements all together.

Cheers,

Sin machine