DW1620 Firmware flash failed BADLY :( now what?

Make sure you have DMA enabled in device manager. Sometimes when you default to M$ drivers it will switch to PIO mode…

Actually in the P firmware change notes for G7P9 is that it fixed the problem with nforce drivers, so it must have been a recognized problem BenQ knew about. You should be able to flash the regular way now and be able to do G7P9.

Although it’s probably not worth it, to convert to retail B version it’s know you go back to G7K9 and use that cvt file (which i have) then yes you go to the 1600>1620 firmware and then on to the latest B.