Might be a bit late to answer, but I have been using an EVGA GTX 670 SC (which is slightly overclocked) for about a month. I also use the 301.42 driver for the card.

Other specs:
Intel i7-3820 @ 4.3 GHz
16 GB of RAM
Windows 7 64-bit

I usually run GPUGRID during the day while idle and through the night. I run all the applications available and so far my times have been pretty fast.

For long-runs, it takes about 5-7 hours, depending on the task. The standard tasks run for about 2-5 hours also. The beta tasks take anywhere from 30 minutes to 2 hours or so.

Note that the times do range, and as of now I'm crunching many beta tasks so I couldn't give too precise of times on the other tasks.

As for heating, the card stays at about 67 degrees Celsius during long-runs and doesn't go higher. The card load is at about 90-95% during long-runs, also, and ranges around 50% during beta tasks.

The only problems I've had are driver crashes when stopping the beta tasks that have come up recently, which are the Noelia tasks.

Hope this helped.

Might be a bit late to answer, but I have been using an EVGA GTX 670 SC (which is slightly overclocked) for about a month. I also use the 301.42 driver for the card.

Other specs:
Intel i7-3820 @ 4.3 GHz
16 GB of RAM
Windows 7 64-bit

I usually run GPUGRID during the day while idle and through the night. I run all the applications available and so far my times have been pretty fast.

For long-runs, it takes about 5-7 hours, depending on the task.

Dylan: When comparing your GTX670 long runs to my GTX570 long runs clearly your 670 is slightly faster. However, your CPU times seem extremely large compared to mine. I am guessing that my Q9550 (4 core non-hyperthread) has more cache available than your 8 core i7-3820?

I wonder if there is going to be a big improvement with CUDA5? We are both running CUDA42 gpugrid app.

I'm pretty sure my CPU times are larger because I didn't give a core to the GPU, and instead gave all 8 to another project. Up until now I never really thought about it, and will try to fix it as soon as I can. Thanks for the notice.

6XX cards always use a full core so if you set BOINC to use 1 less thread than your CPU has available your other projects that use CPU only will process much better!

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Thanks - Steve