First off, I'd like to say that overclocking the Albatron GeForceFX 5900PV was a very frustrating process but it was not Albatron's fault. With a default speed of 400 MHz core, 850 MHz memory the only thing that differentiates between a GeForceFX 5900PV and a FX 5900PV Ultra is the core speed (Ultra runs at 450 MHz) and of course the $100 US price tag. ;-)

Anyway, we begin raising the core speed first. Starting at 400 MHz we went up in 10 MHz increments, 440MHz, 450MHz, 460MHz came and went easily, as did the 470MHz and 480MHz mark. Amazingly the core would do 500 MHz!!! Anything higher and the CodeCreatures benchmark would lock up.

The memory was not to be out done by the core, using 2.2ns Hynix memory (the same memory that's on the FX 5900PV Ultra and runs at the same speed) that runs at 850 MHz we jumped up at higher intervals. 900MHz, 925MHz, 950MHz and no problems in sight. The memory did an amazing 1 GHz, but anything higher and coolbits would say there was an error.

Now comes the somewhat frustrating part. With both the core and memory both heavily overclocked the benchmark results would be lower then stock! Puzzled, I began to search around the net to see if others had the same problems and apparently the nVIDIA GeForceFX 5900PV/FX 5900PV Ultra's will automatically slow themselves down if they get too hot! While I understand why nVIDIA does this, it certainly makes it harder to determine the maximum speed of a videocard.

In the end the highest we were able to overclock both the core and memory and have acceptable results was 466 MHz core, 975 MHz memory.

System Spec's:

pcstats test system specs:
computer hardware:
processor:	pentium 4 2.8 ghz
clock speed:	21 x 133 mhz = 2.8 ghz
motherboards:	msi gnb max-fisr*
chipsets:	e7205
videocard:	ati radeon 9800 pro (380/680) ati radeon 9700 pro (325/620) msi g4ti4600-td (300/650) gigabyte radeon 9600 pro (400/600) albatron geforcefx 5600p turbo (325/600) albatron geforcefx 5900pv (400/850) albatron geforcefx 5900pv (466/935)
memory:	2x 256mb corsair xms3500 cas2
hard drive:	40gb wd special ed.
cdrom:	nec 52x cd-rom
floppy:	panasonic 1.44mb floppy drive
heatsink:	avc sunflower
powersupply:	vantec 470w stealth psu
software setup	windowsxp build 2600 intel inf 5.10.1012 catalyst 3.5 detonator 44.03
workstation benchmarks	3dmark2001se 3dmark03 aquamark codecreatures commanche 4 gun metal 2 quake iii arena ver 1.17 ut2003 aa test, af and aa+af test 3dmark2001se quake iii arena

up next, a few dozen pages of benchmarks. :-)