MY 4x7950 use nearly 1300W...
my 6x7950 are pulling 1050W at the wall (810MHz@0,875V), the price you pay for overvolting/overclocking
Topic: Poor Unbalanced Performance - 7950 x 4 - Litecoin (Read 1475 times)
my 6x7950 are pulling 1050W at the wall (810MHz@0,875V), the price you pay for overvolting/overclocking
MY 4x7950 use nearly 1300W...
Maybe try changing PCI Latency setting in bios. Hope it helps 
Thanks I'll give it a go.
What PSU?
Corsair HX1050
What PSU?
Maybe try changing PCI Latency setting in bios. Hope it helps
Hardware
4x 7950, 8GB of Ram, FX-6100 processor.
Software
Catalyst 12.8
ADL SDK 5.0
APP SDK 2.7
Xubuntu 12.04
CGMiner 2.11.4
What was happening before -
Previously I was running this rig with 3 cards. I was getting ~1.5 Mh/s - 500 Kh/s per card. Not mind blowing, but acceptable. I was using the following command to start.
What is happening now -
So now I've upgraded my rig by adding an extra card. Instead of getting gains it seems my cards are simply running slower apart from GPU0.
It seems even at lower intensities now it's mining unevenly (@ I=13)
Instead of getting 500 Kh/s I'm getting ~ 350 - 400 a card, even though with the same settings before I was getting 500 (same as GPU0). Can anyone suggest trouble shooting methods or ideas as to whats going on?
Help appreciated.
4x 7950, 8GB of Ram, FX-6100 processor.
Software
Catalyst 12.8
ADL SDK 5.0
APP SDK 2.7
Xubuntu 12.04
CGMiner 2.11.4
What was happening before -
Previously I was running this rig with 3 cards. I was getting ~1.5 Mh/s - 500 Kh/s per card. Not mind blowing, but acceptable. I was using the following command to start.
Code:
export DISPLAY=:0
export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
./cgminer --scrypt -o stratum+tcp://stratum.give-me-ltc.com:3333 -u username -p password --thread-concurrency 24000 -I 18 -w 256 -g 1
export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
./cgminer --scrypt -o stratum+tcp://stratum.give-me-ltc.com:3333 -u username -p password --thread-concurrency 24000 -I 18 -w 256 -g 1
What is happening now -
So now I've upgraded my rig by adding an extra card. Instead of getting gains it seems my cards are simply running slower apart from GPU0.
It seems even at lower intensities now it's mining unevenly (@ I=13)
Instead of getting 500 Kh/s I'm getting ~ 350 - 400 a card, even though with the same settings before I was getting 500 (same as GPU0). Can anyone suggest trouble shooting methods or ideas as to whats going on?
Help appreciated.
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