w00t! I replaced the mobo (got a better one for cheap) and also replaced the PSU (got one of those silent ones) and all gfx problems are solved!!!
Now let's OC!
TheMajorMMX - Intel P200 MMX @ 225Mhz - V-Tech (PcPartner) Baby-AT mb w/ Intel Triton TX chipset - Nvidia Riva TNT2 M64 w/ 16MB - 256MB M-Tec SDRAM - Still running.....