Sharing data about PCI video cards

ConnorBehan · 2009-12-18 13:26:15

Hello, on and off for the past year I've been messing around with ATI/KMS and have managed to get a framerate of 280fps in glxgears. My hardware situation is very odd for two reasons: I'm using a PCI card (Radeon X1550 2256MB) and it's behind a nonstandard bridge (Thinkpad Dock II). An 8MB Rage 128 card is able to outperform this card with 600fps so all this time I've been thinking that my slow framerate is due to the infancy of the modesetting radeon driver.

However it might be a simple hardware limitation that I can't do anything about. I used radeon.benchmark=1 in the kernel command line (be careful using this... I had to recover my boot loader manually afterward) and it said blit and dma both had speeds of 35M/s. This makes me think my bus is slow *even for PCI* as PCI is supposed to be 133M/s. So maybe I'm lucky to even get 280fps. The only cards listed on http://free3d.org which I *know* are PCI (many could be PCI or AGP) have framerates in the 200s.

If anyone on this board still uses PCI (I don't care what model or driver) could you please make a post like this so I can test this theory?

card: Radeon X1550 PCI with 256MB
driver: radeon modeset=1
glxgears: 280fps
io speed: 35M/s

Arch Linux

#1 2009-12-18 13:26:15

Sharing data about PCI video cards

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