Hi. I just tested without the 2 8 pin chips and also with the WarpEngine. The computer does boot with those chips removed. Strange enouph, if I plugged in my 4091 at the same time it wouldn't boot.
As for with the WarpEngine, pretty much same result, except the with the 3640 it seemed to try to boot 2 times, with the WE the screen changes tone of grey in around 2 or 3 seconds interval. I guess the WarpEngine is smarter and tries to boot constantly while the 3640 gives up at 2nd time.
@MastaTabs
Any chance you can check up the card for me ?