Need help with build

CasperRoar

Honorable
Apr 17, 2013
2
0
10,510
I recently decided to build myself a computer. I have built a few others before, but it has been a few years. The issue I am facing is with the graphics cards, everything was working fine before I decided to upgrade them.

The build is as follows,

ASUS P9X79 PRO Motherboard
Intel Core i7-3820 Quad-Core Processor 3.6 GHz
Corsair Obsidian 550D Case
ASUS GTX 660 Ti Graphics Cards GTX660 TI-DC2O-2GD5 x 2
CORSAIR HX Series HX750 750W Power Supply
CORSAIR H100i Water Cooler x 1
CORSAIR Vengeance LP 16GB (4 x 4GB)
Corsair Force Series GT 120GB SSD

I was originally running Windows 8 x64, but kept having an issue where the display driver would keep crashing. I switched to Windows 7 x64 and haven't had the issue again until I decided to add the second graphics card in SLI. What appears to be happening is that the usage on both cards is always spiking to 99%. I have tried different driver versions from Nvidia multiple times. Still no help. This setup is even lagging when attempting to play Assassin's Creed 2. Also I have done no overclocking on these GPU's.

Any help or suggestions would be greatly appreciated!
 

yasserBasha

Honorable
Mar 23, 2013
853
0
11,060
Nvidia cards has issues working w/x79 chipsets (socket 2011) ... somehow slows the performance down especially in latest games like Crysis 3 :

http://www.tomshardware.com/reviews/geforce-gtx-650-ti-boost-gk106-benchmark,3463-4.html

QUOTE :
" ....Notice that Nvidia's latest suffers from a lower minimum frame rate than the rest of the field due to its 314.21 beta drive on our uncooperative test system. We've shared our results with Nvidia, and company representatives let us know they weren't able to reproduce our findings.
**This could be specific to our X79-based platform (we've been seeing an increasing number of X79-oriented issues lately)** .... "


You can change the build to 1155 and let the x79 build for work or another non-gaming purpose (with AMD card of course)
 

CasperRoar

Honorable
Apr 17, 2013
2
0
10,510
I have verified both cards work in another system, that's not an issue. I also tried using 'force-enable-gen3.exe' to force PCIe gen 3, which didn't help. What I don't understand is that it was working fine until I added the second card. Now it won't work anymore if I remove the card I added.

Also something strange, my frame rate is at around 22fps in FurMark, but when I move my mouse, it jumps to 61fps, and will stay there as long as I keep moving my mouse, which is really odd. Also I notice from a monitor that when its at 22fps, the Frame Buffer usage is at about 2%, but when I move the mouse to get 61fps, the buffer jumps to to around 37% usage. The same stays true when I play a game, the fps jumps when I move the mouse, but since I play mostly with a connected xbox controller, this doesn't help much.

Anyone have any other ideas? Will Nvidia eventually be able to solve this issue?