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The likelihood of the euro zone even still being around in 2014 isn't all that high at this point, I wouldn't worry too much.
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oh wow what did I tell you tacotime can't get 700kh on a 7970 after all. If it was really possible to get an extra 20% from a 7970 why wouldn't a 7970 run much cooler when running at 550kh it does bitcoin mining at the same clock speeds? Surely enough to make up for a little bit of heat caused by extra ram usage. People still don't believe me on calling out bfl's lies but I did pretty good job here.
I was going by what other people told me. I'm sure we'll get some extra kh/s out of it when the kernel gets ironed out. |
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@tacotime,
how much system RAM is occupied for these reaper settings?
~1.3 GB I'm in the same boat as you guys, I can not get 700 kh/s out of a 7970. i'll have to experiment when i get more time |
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^^ yup.
the weird thing is that works for some cards and not others. i have an xfx 7950 that works fine on, but my gigabyte 7950 will only go down to 650mhz alone. if i put both cards in a system i can use that trick to underclock the memory of the xfx card and then check off the box that says "use the same settings for similar cards" to get the gigabyte card's memory down, but otherwise i can't.
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that's really weird. try reaper with thread_concurrency 5632 and aggression 18.
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Current code ./cgminer --scrypt -o http://ltc.kattare.com:9332 -u jasinlee.1 -p 1 -g 1 --thread-concurrency 8000 -I 18 -w 256 --auto-fan I Assume this probably has to do something with it. [2012-10-14 21:35:49] Failed to init GPU thread 0, disabling device 0
[2012-10-14 21:35:49] Restarting the GPU from the menu will not fix this.
[2012-10-14 21:35:49] Try restarting cgminer.
Press enter to continue:
[2012-10-14 21:36:09] Your scrypt settings come to 524288000
[2012-10-14 21:36:09] Error -61: clCreateBuffer (padbuffer8), decrease CT or i
ncrease LG
[2012-10-14 21:36:09] Failed to init GPU thread 7, disabling device 7
Oh, use --thread-concurrency 7168 or 5632. that's cgminer sucking because of ocl memory consumption problems. |
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remove --shaders
Same error again, tried a few different -I Tried 15-18 all same issue. Weird, try ./cgminer --scrypt -o http://ltc.kattare.com:9332 -u jasinlee.1 -p 1 -g 1 --thread-concurrency 8000 -I 18 -w 256 --auto-fan edit: for the mem/core speeds as you suggested: ./cgminer --scrypt -o http://ltc.kattare.com:9332 -u jasinlee.1 -p 1 -g 1 --thread-concurrency 8000 -I 18 -w 256 --auto-fan --gpu-engine 750,750,750,750 --gpu-memclock 1300,1300,1300,1300 |
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try -w 256 and --thread-concurrency 8000,8000,8000,8000
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what are your core/memory clocks?
For bitcoin I was using 165/775. Litecoin requires memory speeds to be at or above the core speeds |
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if you can mine at aggression 20 you should be able also to mine at aggression 16. but i guess if that's not the case that's not the case. you could try, worksize 256
vectors 1
aggression 16
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 34816 If the thread concurrency is within the correct range and threads_per_gpu set to 1 you should not get stales with high aggressions. But these cards act really weird and it's hard to tell why they do the things they do sometimes. |
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what are your core/memory clocks?
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The best config for 7970 is (565khash\s): worksize 256
vectors 1
aggression 13
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 34816
Maybe I will continue experiments to find the better config. But it seems that 7970 is better for BTC mining because it is not hard to get ~700mhash\s Maybe a stupid question, but have you tried aggression 16? This is about 30% faster than aggression 13 on my 7770. |
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try these thread concurrencies with aggression 20 and worksize 64, threads_per_gpu 1
16384
17408
18432
19456
20480
21504
22528
23552
24576
25600
26624
27648
28672
29696
30720
31744
32768
33792
34816
at some point on the low end you'll get lots of HW errors and at some point on the high end you'll get a really slow speed. at some point in between you'll find your optimum thread_concurrency. unfortunately no one can tell you what that is, you need to experiment.
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I dont see any settings for 7970s. I am using these for mines which get around 525-550KHs
worksize 256
aggression 13
threads_per_gpu 5
sharethreads 18
lookup_gap 2
gpu_thread_concurrency 10240
Same as for 7950, you should get 700-800 kh/s |
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