I had the same card, 3dfx Guillemot Maxi Gamer 3D, £90 from Game. And I had a Cyrix CPU (which was terrible for gaming) as well. But that was late 90s; early-mid 90s PC gaming was still expensive because you needed a high end CPU, when the Pentium came out it was like $900 which allowing for inflation would be the equivalent of $1500 today. RAM was also really expensive, a CDROM drive was like £150 (equivalent of £250 today) or whatever.
Also you had to upgrade regularly back in the day to handle the newer games coming out, it's not like modern computers where you can run the same mobo and cpu for 5+ years, graphics cards for 3+ years etc. So even in the late 90s you'd buy a PC, then you'd need a RAM upgrade and a 3d accelerator card, then within 2 years you'd really need another GPU, but that would be cpu limited so you needed a new CPU, which inevitably meant a new motherboard and sometimes RAM as well. All the while needing to add more storage as games moved from floppies to CDROM to multiple CDs to DVD (at which point you need a DVDROM drive).
I've spent far less on PC upgrades in the last decade than I did in the previous one, not counting peripherals like Monitors and mice. Some of the individual components might have crept up in price, but you don't need them as frequently.