Ok, so I have been playing Doom3 on a 5700 Ultra for about a week. I'm getting 14-24 fps at medium quality 1024x768. Good enough. Tonight I swap in one of my 5800 Ultras, and fps skyrocket to 42-60 fps, with a spurious 72 fps reported occasionally! The game flies!
I did't expect to double my fps. What's up? Can someone explain it in simple language, please? Guess I didn't pay enough attention to the old threads claiming that the NV30 has more raw _____ (¿fillrate?) than the NV35/38, despite the 128 bit memory bus, and now I want to know ....
XFX 5700 Ultra
PNY 5800 Ultra
SN41G2 nForce2 chipset / Barton 3000+ / 2x512M PC2700 Corsair TWINX
Liteon 52x CDRW&DVD / 2xWD1200 JB / 480W FSP group PSU