Jimmor helped me tweak the 5950 bios I flashed my 5900NU too. I not only flashed my 5900 to a 5950, but I tweaked my memory latency timings and everything worked fantastic
Extremely fast with scores close to what Jimmor posted on his. Perfectly stable too.
The card is still working great in my sisters computer. When I had it I played Doom3 just fine at 1024 x 768, high settings. Not as fast as my 6600GT but still usually around 50 fps which is not bad.
Not the greatest DX9 card, but still does ok. I always thought the 5900 series got a bad rap. I still think they are very good cards.