OK, so I thought I'd replace the stock HSF on my A64 X2 3800+ with an Arctic\nCooling Freezer 64 Pro, but (of course the passive heatsink on the\nNorthbridge chipset was too close (A8N-VM CSM, rev 1.01), so I took it off\nand installed the Freezer according to the accompanying instructions.\nRebooted, and all seemed well for a few minutes (except, ironically, the\nstock cooler was quieter) and then my screen went crazy with a broken,\ndiagonal image of the desktop, then blank. System stayed on, with all fans\nand lights going, but nothing on the screen. Powered down immediately, and\n(you guessed it) system would not POST. No error beeps, no apparent video\noutput. So, my question is, could removing that passive heatsink have\nactually let the Northbridge overheat, and if so, did I fry the onboard\nGeForce 6150?\n\nI tried everything I knew to get the system back up including clearing the\nCMOS, but no joy. The board has been RMA'd back to Asus, but did I void my\nwarranty by removing that heatsink? I have a nasty feeling I did. I guess\nI'm wondering if a passive heatsink can make that much difference. Anyway,\nfeeling dumber than I have in a while and would like some opinions on what\nlikely happened. TIA.