BAP, any WU's that start at 80% are highly dangerous and should be stopped immediately and e-mailed here for careful analysis and subsequent completion and submission to Stanford, all on my safety-rated equipment. 
j/k
7626 is a gpu wu while 7646 is an smp wu so you know the cpu end is at least working properly. Yes, it started at where you left it before the re-install because the data stayed intact. Don't know why your gpu isn't folding, what's your gpu monitoring utility (afterburner or precision or whatever) telling you, is it showing 0% gpu usage? Try re-booting, delete the gpu w/u, all the usual tricks. Is the fan on the gpu spinning?
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