i have the fx5950 Ultra that was given to me and for starters the performance well... isnt great. I got a 10900 on 3dmark2001 on regular settings. Not to mention its Stuck at the 4x rate. Now i will say that my 9600xt was stuck at 4x as well and nothing i did would change that. and to answer ur questions ahead of time, yes my bios settings are set up properly to have 8x enabled. But i almost wanna say that its the mobo's issue...? i have an asus A7N8X-E Deluxe. 1gb ddr400... 3200+. any help or suggestions are welcome.