Calculation time GTX 580 vs GTX 680

Hello,

I did an interesting finding on the calculation time reported by SETI. I have now in the same computer both GTX 580 and GTX680.

The finding is that for GTX 580 the reported calculation time for one WU is roughly 1100 seconds while for the GTX 680 the calulation time averages around 250 (4,2 minutes) seconds.

When checking the Boinc Manager Tasks tab on active work Units the average calculation time for a WU is roughly 20 minutes (=1200s) (3 WU concurrently per card). So the calculation time reported is more in line with the GTX 580.

Why is the reported calculation time for GTX 680 differing so much?
Is GTX 680 idling somewhere and this is not reported in correctly?


http://setiathome.berkeley.edu/results.php?hostid=3299266&offset=0&show_names=0&state=2&appid=

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So If I read this correctly:

580 is doing one WU in about 18 min

680 is doing one WU in about 4 min

Each doing 3 WU's at a time.

Looks like the 680 is completing WUs MUCH faster! As far as the average, it would be just that, an average overall. So if you where running the 580 alone for say 1000 WUs in that rig before adding the 680 and have only completed 100 WUs, the average is going to remain high since its taking an overall average off all the WUs.

A really good true test would be to setup two new rigs, then put the 580 in one and the 680 in the other. There may be an easier way to reset the average as well,
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My Computers:
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█ Red Offline