Hi I was curious if a AMD 6000+ on a nForce 590 made by EVGA could be bottlenecking 2 GTX 260's (216's) in SLI. I have noticed some lacking performance (dips below 30fps) in some games and performance all around that leads one to think that the system is running off one card instead of two. Other info, I have 8 gigs of ddr2 800 memory , OS is Vista 64 bit, power supply is 750w. Cooling is adequate. Does anyone here have any suggestions, could it be a failed PCI slot or a fried card? Latest drivers are installed (182.08) and yes SLI is "enabled" in nvidia settings.
Yeah most likely it is your cpu that is causing the bottle neck, usually for amd processors in the x2 line the best way to use them is to buy the black edition and overclock them in order to reduce the bottleneck if your cpu is at stock speeds then chances are it is seriously bottlenecking your cards
First of all you'll get a slight performance hit for using a PCI-E 1.0 motherboard as opposed to a PCI-E 2.0 motherboard with two 16x lanes. On top of that your CPU is limiting your performance. Nvidia drivers do take advantage of multiple cores when running in SLi so upgrading to a newer quad or tripple core CPU would help you there. You should check the EVGA website to see if you can support newer AM3 CPUs with a BIOS update. If not then see if your board will at least support the phenom quad cores so you can go with something like a 9950 or a 9850 and overclock it. If your board does not accept that then you should look into overclocking your current CPU until you can upgrade your board and CPU.