PCI Express running at 8X instead of 16X

imported_OSUBaller

Junior Member
Feb 24, 2007
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Hey everyone, posted this on the video section, but, couldn't get much there. I just finished assembling a new rig as a light gaming rig. It is an AMD FX-55 with an evga GeForce 7950GT vidcard in a Shuttle SN26P (nForce 4) sff case.

I ran 3dMark2006, and found that my system ran on the lower end of similarly configured systems. Trying to determine what was the cause, I carefully went over the system information, to see if there were any settings that I could adjust. Here is a screen shot of the systems information scan from 3dmark2006:

SNAPSHOT

What I found odd was that despite this motherboard having 2 PCI-Express 16X slots, and having a PCI Express 16X vidcard, that the bus was running at only 8X. I circled this in red in the screen shot above.

Now, I understand that if I was running 2 vidcards in SLI mode, that then both PCI Express slots would be running at 8X, for a total of 16X. But here I have a single vidcard, running at 8X.

Short question to a long story: What do I need to do to get the bus running at 16X? Is this potentially affecting my rig's performance on these benchmarks?

Thanks everyone. Hopefully this wasn't TOO verbose.