I wonder if someone with the same kind of setup could check the memory bandwidth achieve between the GTX280 and a X38 chipset based motherboard.
I am running WINXP64 with 8GB of ram and I see only 2.4GB/s (pinned or not) to or from the GPU.
That looks like PCIe Gen1 results to me but the X38 is a PCI e Gen2…
I saw some 5GB/s around in some other posts but that was probably on an Nvidia chipset 780i/790i …
I have the 177.35 driver installed just in case.
Oh and I also have a GF8600GT in the same system on the second PCIe bus.