Asrock 110BTC - Slow last card

lablettlablett Member Posts: 333 ✭✭
I just consolidated a batch of 9 GPU's (470's mining edition) into a Asrock 110BTC.

In MS Windows disabled the on-board Intel GPU and there is 16GB RAM.

The cards normally pull about 29Mh/s but for some reason the last card seems to drop to 25Mh/s.

Has anyone seen this before where the last card is lower and I am using Claymore !?
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