I have a Chaintech SE6200 256mb NV43 PCI express card which I am planning to flash the bios to a 6600 to allow for better overclocking (speeds are locked in the current bios, I have already unlocked extra pipelines for 40% increase in speed). Does anyone have experience flashing the bios of the PCI express version of a 6200 to a 6600? More importantly what BIOS did you find best. Otherwise I will answer the question through trial and error.