Had pretty much the same thing... but only one overclocked Celeron to 433. Was amazing upgrade from my pentium 133 with a Matrox Millenium; which I somehow used to complete Half Life in low FPS agony.
I still have distinct memories of "playing" CS in 640x480 on a PII with the same card, which didn't do 3D at all iirc. 12-15 fps with the software renderer, depending on how many bots you had.