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HD4850X2 and PCI-Express 1.0

post #1 of 38
Thread Starter 
Hi, I need some help. I currently have a Gigabyte GA-P35-DS3L (rev 2.0) motherboard that I'm running stable with an Intel E8500 at 4 GHz and 4GB of DDR2 1066MHz ram. I recently bought a Sapphire HD4850X2 and it's running nicely however I feel that my card isn't performing as well as it should. I know my CPU and RAM definitely aren't bottlenecking it; however, I believe that, because my motherboard has only PCI Express 1.0, it may be bottlenecking my HD4850X2.

I get really low FPS (14-22 FPS) on a 1600x1200 monitor when I know this card can get around 25 FPS in Crysis at 1920x1200 according to many reviews. As a side note, I'm currently using 8.12 drivers from ATI. Do you think that my motherboard is bottlenecking me? If not, what could be the cause of this problem? I appreciate any input if you guys could help me out. Thanks in advance.
post #2 of 38
Not the same card, but the 9800gx2 is not bottlenecked in crysis at PCI-e 2.0 x8 (roughly equal to 1.0 x16) Hell, even at x4 it barely shows a decrease in performance.

http://www.tomshardware.com/reviews/...0,1915-10.html

You got some other problems going on, your motherboard isn't the culprit.
Edited by Liability - 12/20/08 at 6:56pm
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post #3 of 38
Yes, I would wager a very large bet that it is. I specifically bought my P5Q Pro for the PCI 2.0 for the 2nd 4850 I'm planning on buying down the road.
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post #4 of 38
Quote:
Originally Posted by low strife View Post
Yes, I would wager a very large bet that it is. I specifically bought my P5Q Pro for the PCI 2.0 for the 2nd 4850 I'm planning on buying down the road.
you do realize the irony right? When you add another GPU they will go to 2.0 8x which is 1.0 16x
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post #5 of 38
run some 3dmark06 scores and post em here
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post #6 of 38
The bottleneck from PCIE comes in high resolutions above 1900*1200 most of the time.
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post #7 of 38
Thread Starter 
I got about 13,500 for 3dmark06 at default settings (no changes to settings). And thats with the following setup: E8500 at 4ghz stable, 1065mhz ddr2 ram with 5-5-5-15 timings, and HD4850X2 at stock. I know thats pretty damn low so something is wrong, I definitely think its my PCI-express 1.0 bottlenecking me. Nothing else could explain those results. Someone give me an idea on what I should do and whether getting a PCI-express 2.0 mobo will boost me.
Edited by Open1Your1Eyes0 - 12/20/08 at 9:51pm
post #8 of 38
Thread Starter 
The only two things that make sense that would slow me down are either the P35 chipset or the PCI-Express x16 1.0 slot I have.
post #9 of 38
Have you confirmed that Crossfire is working?


You might have gotten some issues with 8.12.
    
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post #10 of 38
Quote:
Originally Posted by Open1Your1Eyes0 View Post
The only two things that make sense that would slow me down are either the P35 chipset or the PCI-Express x16 1.0 slot I have.
Or your drivers are not working properly which is more likely the case.
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