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.
Yeah since they're old almost all of those are AGP. The best bios there was the sparkle 6600 bios (AGP), somehow is resulted in 10-15 more Mhz while being stable. I'll probably just figure it out for myself, it's what i deserve for being so cheap.
Alright I flashed it with a Asus EN 6600 bios and it seems to be working great. I'm not sure I will even try to play around with the right bios anyways. I'm currently at 340/530 (oc, 8-pipeline) vs 300/500 (stock 4pipeline); with an improved 3Dmark of 2306 vs. 1514. So I guess the verdict for now is that the PCIe version works fine with a simple bios flash. I guess that's exactly what I was expecting since its a only an interface change. I'll continue to push the OC and leave this as a future reference.