played with the PCI-e frequency setting in BIOS some, not much, though, as it's getting late here. I'll mess with it some more tomorrow, as I'm interested in seeing how high that setting can go before I start getting errors.
Anyhow, there does seem to be a performance gain for a x1950. I used 3m06 for testing purposes, and a minimum of 15 minutes of cool down to idle temps before each change/run. Tested at the stock clock speeds of 575/1390, with ATi Tray Tools 3D profile set to "Auto Balanced". 3m06 at defaults. All other PCIe settings in BIOS (labeled as Peg Root controls) were all left to auto.
PCIe @ 100 (the most commonly *recommended* setting) = 4192 marks
PCIe @ 105 = 4193 marks
PCIe @ 110 = 4241 marks
PCIe @ 120 = 4306 marks
so, it does seem to help. Although, I want to test higher settings, and I also want to test having it set to [AUTO]. From there, I want to see how much of a difference it makes running the card 5% OC (the highest 100% stable I can manage
), and if there is any change with tweaking the Peg controls (specifically, slot voltage and bandwidth).