4 x Gigabyte 7970 problem when detaching monitor

lazydna

full member

Activity: 126

Merit: 100

Quote from: pstudart on June 18, 2013, 08:32:19 AM

Also i am really shocked your able to get 720 for 1 gpu I run at 1200 1400 and only get 640 per gpu.

brand of 7970 matters a lot, also, the higher clock/mem does not translate into higher hash for scrypt. you have to trial and error the right balance with thread concurrency and intensity to get the best settings.

pstudart

newbie

Activity: 33

Merit: 0

Also i am really shocked your able to get 720 for 1 gpu I run at 1200 1400 and only get 640 per gpu.

pstudart

newbie

Activity: 33

Merit: 0

are you running windows 7? i had this problem running windows 8 with the same setup you have except i had 3 gpu's

BitCrawler

newbie

Activity: 30

Merit: 0

Quote

I assume the temperatures and fan speeds disappeared due to a mismatch of OpenCL and ADL devices (according to the following text at cgminer's start):

I have the exact same problem. I'll let you know when I have found a solution. I have no clue about your other problems. My cards are always running at the same speed, with or without monitor. Even remote (ssh) has the same values. I did have some problems when I was running on Windows, but most of the time I could fix that by reinstalling the drivers.

Tornate

full member

Activity: 128

Merit: 100

Guys, I got 2 problems with my 4 x 7970 Gigabyte OC mining rig Huh

The 1st problem is when 4 cards running with attached monitor, the one with monitor cable connected is always 100 Khashes slower than others (at skrypt algorithm). It is always the nearest PCI-E slot to CPU fan on motherboard.

GPU 2 = 1st slot on the mother board (nearest to CPU Fan)

I tried to swap the 1st (the one with monitor cable connected) with 2nd or 3rd cards. Nothing had changed: the card on which I replaced was still slower than 3 others..

Then I detached monitor and a second problem has arisen.
I started remote desktop connection via RAdmin (also tried LogMeIn) to connect to my rig, then launched CGMiner.
Here's what I got:

GPU 2 = 1st slot on the mother board (nearest to CPU Fan)

I assume the temperatures and fan speeds disappeared due to a mismatch of OpenCL and ADL devices (according to the following text at cgminer's start):

Tried to search the forum, but did not find the solution how to "use the gpu map feature".

My .bat script:

Code:

setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt --gpu-fan 80 --gpu-engine 1050 --gpu-memclock 1500 --intensity 13 --shaders 2048 --thread-concurrency 8192 --worksize 256 -g 2 -o XXXX -u Collide.1 -p XXXXXX

//sorry for my English, I would be very grateful, if someone PM'ed me pointing out my grammar/lexical mistakes.

Topic: 4 x Gigabyte 7970 problem when detaching monitor (Read 1330 times)