I have suspected this for a few weeks now. I've got my system up and running - everything is hunky dory except the proformance I'm seeing isn't what I'd expect: I refer you to awaham's review of the XFX 6800 GT here
he is getting:
3D Mark 03 score = 10,600
Doom 3 1280 @ 4AA @ High Quality = 46.2 fps
compared to the results I've had:
3D Mark 03 score = 6,500
Doom 3 1280 @ 4AA @ High Quality = 29.5 fps
My set-up is as follows
AMD 64 3500+
Asus A8V Deluxe WiFi Edition M/B
2 x 512 Mb Corsair Value, sync'ed and set in dual channel configuration
XFX Geforce 6800GT 256Mb OC'ed (registry patch from XFX site)
Samsung Combo CD-R/DVD Drive
Seagate Barracuda 160Gb SATA
Samsung 160Gb 133UMDA
A few points to note:
My samsung drive needs to be formatted XP loads really slowly on it but is fine once all the tray icons have appeared....odd. However this is my old drive and I now use the Seagate SATA drive as primary which also has XP installed.
I am currently running AC97 on-bound sound, but I have a SonicFury 5.1 (I only have 2.1 setup) Is it worth me installing the SonicFury?
A few things I've noticed:
When installing the graphics drivers Windows XP reckons they aren't signed and pops up that warning dialogue. I click continue anyway, of course...but should I be seeing this? This happens with both the latest drivers from the Nvidia site and also the drivers supplied on the CD.
When trying to install the Geforce Tweak utility it can't find a Geforce based card in my system! What's going on here then!
I also tried Doom 3 @ 800 @ No AA @ Medium Detail and only achieved 35fps.
.....something is seriously wrong with my set-up if these results are anything to go by. I'll happily reformat to correct any issues but I got the same score since I last formatted the SATA (2 attempts) and got similar results each time in 3D Mark 03.
HELP!
PS.
I have also turned of AGP fast write in the bios and I'm runnning Nvidia forceware 61.77 - score is still around the 6500 mark.