dEjAvU schrijft dat er bij Tweak 3D eens werd gekeken naar de overklokbaarheid van nVidia's verse GeForce2 Ultra chip. Na het aanbrengen van de nodige koeling in de vorm van Card Cooler XT en Honeywell SuperTurbo fans, een thermal probe en het editten van het register om de overklok-sliders tevoorschijn te halen kon het feest beginnen. Als maximale core-speed werd 265MHz behaald (standaard was 230MHz) en het geheugen strandde op 500MHz (standaard was 460). Deze tweak-actie resulteerde in een snelheidswinst van 11.8% onder Quake III Arena in 1600x1200x32bit:
As I clicked the speed up a few MHz at a time, I would start up Quake 3 and run the 1600x1200 timedemo. I had a feeling it would crash sometimes but it seemed stable. At 260 Mhz core / 480 MHz memory I decided to run the demo twice just to make sure it wasn't going to crash. The temperature on the probe still read only 90.9ºF. After the second demo completed without problems I looked down at the probe -- 94ºF. So, the chip was heating up. No problem there -- I figured another 10ºF or so shouldn't be a problem. I kept the memory at 480 because I knew it was safe for now. I cranked the core to 270 MHz. Quake 3 ran horribly sluggish -- 23 FPS. What the hell?
I set the clock speed back to default, and I achieved 20 FPS on the test. I was worried, so I shut the PC down for 30 minutes. When I rebooted, all was fine. So I decided the core would remain at 265 MHz regardless of the memory clock. At 490 MHz memory clock, the card managed 60.1 FPS in the 1600x1200x32bpp test -- my mission was complete. But I decided I shouldn't stop -- in the name of tweaking, and that I could reach higher speeds than ever imagined! Maybe I was delirious, but anyway, I decided to bump the speed up a bit more.
It's often somewhat difficult to tell when the core clock speed is set too high, but figuring out the memory is set too high is usually easy. You'll notice visual artifacts almost immediately. Using this logic, I pushed the memory speed higher. At 500 MHz everything seemed fine. However, I noticed artifacts at 505 MHz and the PC froze at 510 MHz. So it looks like 500 MHz is the most you can get out of this ram (or so).