Man of Honour
Still have my boxed Voodoo 5 5500 AGP RIP 3DFX.
By far the most striking jump in hardware I've had was a Voodoo card, one of the first ones out. Orchid Righteous 3D, I think. Or maybe something Monster 3D. Anyway, Voodoo had just been released and had almost no support from games. Maybe no games at all at that point. Maybe just Quake. The card was seriously expensive by the standards of the time and it came on top of the full cost of a PC because it only did 3D. The only software I had that supported the card was a demo that came on a disc with the card, a pass through a wizard's tower.
It was stunning. Software rendering on a 486 was so far behind it that it seemed like a new thing rather than an improvement on an existing thing. I gawped at it, phoned a friend and gibbered at him about it. He came round, gawped at it, asked where I bought it and went straight there to buy one. He didn't ask how much it cost. I'm not sure that I knew, even after buying it. It was such a new and amazing thing that the cost became less of a consideration.
3dfx failed to keep up with development and made some odd business decisions, but they started the whole thing of hardware 3D for home PCs. It takes a lot to start a new market with new hardware that has a high cost and no support, but that's what they did by making something truly remarkable. I can't imagine any new piece of hardware today that would be so dramatically better than previously existing products.
I'm sure they must have had a reason for shutting out third party card manufacturers, but I can't imagine what it was. "Please buy our competitors' products instead of ours" doesn't seem like a good idea to me. They could have imposed that at the start, when they didn't have any competitors, but by then it was a strange decision.