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Big SLI Performance Hit....Need Help

Last response: in Graphics & Displays
November 27, 2013 3:17:27 PM

Hey guys. Last night I had to remove a few plastic slot guards from my motherboard in order to ship back a different motherboard for RMA (I "borrowed" them before I got RMA confirmation).

In order to get all of the slot guards out of the working motherboard, I had to remove my 2 EVGA 760's in order to get to them. I removed and then replaced each card exactly the same way....But, when I started to play some BF4 I noticed a pretty considerable drop in FPS.

From here, I decided to run 3DMark11 on both Performance and Extreme to see what I would get. In the past, I was getting 11,000P scores and 5,500X scores. Now, only after this quick removal, I am getting 8,500P scores and 4,400X scores. Also did some Cinebench to verify there was an issue. Before I was running 151 FPS, now only getting 120FPS.

I think something serious may have happened. Although, the computer functions seemingly fine...albeit gaming performance took a hit...

If anyone has any suggestions at all I would greatly appreciate it. I have gone ahead and re-installed the latest drivers (331.82 WQHL game ready driver), with no change.

Best solution

a c 332 V Motherboard
November 27, 2013 3:42:43 PM

Check to see if SLI is disabled in the NCP. (Maximize 3D Performance) It may have registered the cards removal somehow.
Do you have the bridge back on?
Try re-installing the driver. It may revert to non-SLI when new. Mine always does. Then just turn it back on.
November 27, 2013 5:19:32 PM

Yup yup it was the setting.....DOH!. Oddly enough, after re-installing the drivers and running another P score based 3DMark11 run....just scored 13,310.....wowza!
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a c 332 V Motherboard
November 27, 2013 5:32:23 PM

Good numbers. When I had 2 x HD 7870 Gigahertz cards in the rig in my sig, My score was 11,116 for 3DMark11:
I never have rated the 2 x GTX 660 Twin Frozrs with 3DMark11.
November 27, 2013 7:49:01 PM

Low 11,000's is what I averaged for the first month of this build, which I was MORE than happy with. I have no idea what boosted it 2k points.....very perplexing.
a c 332 V Motherboard
November 27, 2013 7:57:40 PM

While I normally use Adaptive Vsync for all my games, I like to change Vsync to OFF for any benchmarking pgms in case adaptive might skew the results. You can do that in NCP/manage 3D settings/program settings. Look for any 3DMark pgms that you have that need changing.