Since May I’ve been keeping a record of the 234 WUs my GTX 760 has processed, noting average credits per elapsed hour per scientist.

There’s a 17% swing between some SANTIs and SODERRs. Some? In the table below, “SANTI A” are those that give 115650 credits and “SANTI B” are those that give 13380 credits. Since early July, I’ve been getting only 115650 credit SANTIs.

I wonder why there is such a marked difference between credit allocations…

http://www.gpugrid.net/forum_thread.php?id=2572#21666
Here is some info on credits. There is another thread somewhere in the FAQ about them I think.