I've had many graphics cards over the years, but a couple stand out. 3dfx Voodoo2 12MB: IMO, the shift to 3D accelerated graphics has been by far the biggest jump in graphics quality in recent times. I remember seeing Forsaken (1997) in hardware rendered 3D (using a ATi Rage 2 based card) and my jaw hit the ground. Soon after, they announced the Voodoo 2 and I pre-ordered one without a second thought. Then I ordered another for SLI. These days the improvements are incremental, but back in the 3dfx days the Voodoo 2 was a massive leap into the future. nVidia GeForce 6800nu: Didn't really buy one of these with the intention of unlocking/overclocking. It was just the best I could afford at the time, and I got one on sale. To my amazement it fully unlocked from 12 pipes to 16. I figured it probably wouldn't run reliably at that, but after testing in 3DMark for an hour or two, it was rock solid! So then I started ramping the clock speeds up. I can't remember how far I got, but it was a hefty chunk before I hit problems. Knocked it back down a little until it was stable. I basically had a 6800 Ultra - and that card ran for years (with no extra cooling) and was absolutely stable. Over to you guys.