Problem with running 3x7950 in cgminer, 2x7950 is working just fine!

[dzejmsdin]

Hello, I have a problem with running a rig with 3x gigabyte radeon hd 7950 (2 x rev2, 1 x rev1)
(I've tried also 2xgigabyte + 1x asus)

My hardware:
Mobo: ASRock 990FX Extreme3
RAM: GoodRam DDR3 8 GB 1333MHZ GR1333D364L9/8G
PSU: Chieftec APS-1000C (with 2 cards working in cgminer, it takes  approx. 510W)
CPU: AMD Athlon II X2 240e AD240EHDK23GM
OS: Microsoft Windows 8 32-bit
GPU: Gigabyte Radeon hd 7950 x 3 (GV-R795WF3-3GD)
3x powered risers x1 x16, all in slots x16
SDK 2.9
Catalyst 13.12
CGMINER: I've tried 3.1.0, 3.3.1, 3.6.0, 3.7.2

With 2 gpu's in any configuration its working just fine
Every time I'm trying to use 3 gpu's i'm getting such an error:

Error -4: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)
GPU 0 failure, disabling!
GPU 1 failure, disabling!
GPU 2 failure, disabling!

Please help!

[dzejmsdin]

bump, anybody have a clue? khashes are slipping through my fingers right now ;-)

Ok, found thos thread: https://bitcointalk.org/index.php?topic=421184.0

will check tomorrow and let u know