Problem with Reaper v13b4 (LTC) Turning OFF 7950?

[GeekMan]

I run reaper on one mining rig that I have and I am having a problem on another of my rigs.

I run Win 7 x64, 2x Gigabyte 7950's (1050core/1500mem/1100mV) (Tuned with Trixx), MOBO is an Asrock Z77 Extreme3.

I have a card in PCI-e x16 slots 1 and 3.

My Reaper is configured so device 0 and device 1 are in the same instance.

Anyways, after about 30 minutes, I notice my hash rate go from 1.2 mh/s to 600kh/s.  I dont understand why its doing that.

Help please!

Thanks.

[elchorizo]

What is the temperature of your card after 30 minutes?