When I first tried Guild Wars 2 on my AMD X4 PC equipped with a nVidia Geforce GTX 260, I was in for a shock. The game was unresponsive and slow, and no matter what settings or resolution I applied, the game didn’t give me more then 20 fps. In cities I only got 7 fps, with everything disabled or set to low.
I have been reading about this for a week now, and nothing came up. Until I saw something strange in GPU-Z. In the “interface” field it said PCI-E 2.0 x 16 @x4 1.1.
@x4 means it was running on 4 channels of the PCIe bus, while it should be using all 16…
Then I realized that I had plugged the videocard into the wrong PCI-E slot. My motherboard has two PCI-E slots as I came to learn, one x4 and one x16. Normally it is written beside the slot.
After I moved the GTX 260 from the x4 slot to the x16 slot , GPU-Z showed PCI-E 2.0 x 16 @x16 2.0 .
Guild Wars is now running at high settings at about 50 FPS and it’s running smooth as a cat.
So if you are having trouble getting a good performance in Guild Wars 2, check if your video-card is correctly installed.