Hi, I'm converting/tuning my multirig setup to Claymore's...

Win (GPUz) detects only 5 cards of 6 (didn't tried 7 yet till 6 will work).
Any suggestions?

CHEERS!

My system (all rigs are identical except videocards):
Win 10 Pro N (updated, original)
15.12 drivers
MSI Z87-G45 Gaming mobo
30GB mSATA with about 20GB for virtual RAM/free space
6x (7x) 7950 NOW ON TEST
5x 290 ROCK SOLID
mixed 280x/7950/290 (did not tried yet)
1700W PSU  (1800w max and I'm watching it not being overloaded)
Celeron 1840
4GB RAM (various brands)

I have few rigs like this, on Linux they do fine (EthOS).
Also it was 6 cards working w. Claymore's on this machine w identical setup but another same model HDD.
Other rig with exact same specs have 5x 290 on 60GB SSD and works rock solid w Claymore's.

HDD is a primary suspect? but looks strange.