Not sure what just happened here, but I was getting WU times of about 14 min + with the GTX 465 O/Ced to 800 and WU times of roughly 30min with the GTX 275 O/ced to 750-775.

Now, for some reason the GTX 275 WUs have literally doubled - they are at 1 hour. The GTX 465 WUs looked to have gone up a little as well, but I rebooted, and now the 465 WUs seem roughly back in line, maybe just a tad longer. Even after reboot, the 275 WUs are still at 1 hr to complete.

Any idea what might have occurred here?

Also, as an aside, does anyone have a good explanation why the 275 - pulling 219W and 1000GFLOPS stock - has such a poor showing against the 465 - pulling 200W and "only" 855GFLOPS stock? I would have thought the 275 would be a much stronger pulling card. Not sure what the cause of the huge disparity is, unless it has something to do with a particular CUDA and PG coding nuance, and not just "Raw GFLOPS" power.