Just spotted this @ Overclockers.com seems that Peeps are having some serious problems with Gainward's Geforce Ti4200 graphics card.

The symptoms are typically a "Pink screen of death" or "checker-board" crash while in 2D or 3D modes. This defect appears to affect both 64MB and 128MB models across all variations (i.e. Powerpacks and Golden Samples) and across all platforms (SiS, VIA, Intel).