2 x 7970 problem, need help

[merred]

So i build a rig with 2 x 7970

Card one: MSI 7970 Lightning Boost Edition
Settings: 1080/1500 1138mV

Card two: ASUS 7970 DC2 TOP
Settings: Default



The MSI is giving around 650 khs
The asus is only giving 60 khs.


Catalyst 13.11 SDK 2.9
Win7 64 bit
Cgminer 3.7.2.
Installed MSI Afterburner
Asus GPUTweak


setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer --scrypt -I 13 --thread-concurrency 16320 -g 2 -w 512 --gpu-fan 50 -o x -u x -p x

[JCviggen]

Seems like the ASUS card is idling. I have a 7970 DCII from Asus and I remember it's finicky with regards to the slot it's in and the other cards it is with. Run the ASUS card in the first PCIe slot and the MSI in another.

Also, for settings

--gpu-engine 1000 --gpu-memclock 1725 --intensity 13 -g 2 --gpu-powertune 20 --thread-concurrency 8192

If your memory can do the clocks, that should give you 700 kh/s. If not, you'll crash. My asus card does about 1750 on the memory, no experience with MSI cards.

[merred]

Okay i'll try disabling ULPS first.

[merred]

However I don't understand your settings;

This is default:



The switch is possible on 1.

[TribalBob]

However I don't understand your settings;

This is default:



The switch is possible on 1.

WTF, 5600 Memclock!?!?!? That CAN'T be right...

[merred]

Maybe it's for 3GB? /3... = 1866 which is still a lot :/

[TribalBob]

Maybe it's for 3GB? /3... = 1866 which is still a lot :/

No, I realize now, it's because it's 1375 memclock x GDDR5 memory which equals to 5.5Gbps

[merred]

Have tried different things...but no luck.

[merred]

Or worse..

[merred]

Maybe it's for 3GB? /3... = 1866 which is still a lot :/

No, I realize now, it's because it's 1375 memclock x GDDR5 memory which equals to 5.5Gbps

Still dont get it..

[Wipeout2097]

Increase the intensity on the 1st card, 1 step at a time while it doesn't give HW errors.

If it does, use a lower thread-concurrency and try again.
If there are still problems, use now a higher thread-concurrency and -g 1

[jomay]

Maybe it's for 3GB? /3... = 1866 which is still a lot :/

No, I realize now, it's because it's 1375 memclock x GDDR5 memory which equals to 5.5Gbps

Still dont get it..

AFAIK GDDR5 mem => 4 transfers per clock => real 1400MHz clock is "effectively" like 4x1400MHz = 5600MHz if there was one transfer per clock.
https://en.wikipedia.org/wiki/GDDR5

[jomay]

Or worse..

why don't you post the graphics card setup screen (whatever you get if you press 'G'). That would be way more informative.
Also, you may consider mining a "slower" coin such as litecoin for testing your HW setup. If the pool is too slow to supply work etc.  you can also get low utilization IRRESPECTIVE of your HW setup.