Only getting ~640 on sapphire 7970 dual-x OC Boost

[microzee]

Hello, as the title states no matter what I do, I cannot get past 640. First off, some info with my card:

http://www.techpowerup.com/vgabios/129658/sapphire-hd7970-3072-120926.html

That is my exact card. My card also has the same bios: 015.025.000.099.000000

After extensive testing, and overclocking, my best settings are

Code:

--scrypt -o stratum+tcp://ftc.give-me-coins.com:3336 -u microzee.ftc -p 7623 --thread-concurrency 8192 -I 13 -g 2 -w 256 --shaders 2048 --lookup-gap 2

And you guessed it. The default values.

I have done overclocking, which reduces my values to around 630 or less. I can run a stable memclock at 1700, and I have tried various gpu clocks, all of which do not help that much I also never see a significant drop, so I can never find the "sweet spot." Also, I thought you were supposed to run the highest thread-concurrency your gpu can take, but that also lowers my values. I found that I can run up to 20480. What can I do?

Please don't just post your settings and ask me to try them out especially if they have gpu-engine and memclock settings because that all depends on your certain card. Instead have me run tests or something.

[SpeedDemon13]

Only use shader or tc, not both, it will override with the shader count. I run 1080core/1500mem at 1.1 volts with 20% power tune and get ~750 kh/s.

[microzee]

Only use shader or tc, not both, it will override with the shader count. I run 1080core/1500mem at 1.1 volts with 20% power tune and get ~750 kh/s.

Do you recommend shaders or thread-concurrency? I'm getting ~660 right now, but I would still like to get into the 700 range. Any other advice?

[SpeedDemon13]

Only use shader or tc, not both, it will override with the shader count. I run 1080core/1500mem at 1.1 volts with 20% power tune and get ~750 kh/s.

Do you recommend shaders or thread-concurrency? I'm getting ~660 right now, but I would still like to get into the 700 range. Any other advice?

tc

I've tried shaders before and it would only do 640~680 for me.

[amacar]

Try using this configuration. I get 744khash with kalroth cgminer from here: http://k-dev.net/cgminer/

Code:

setx GPU_MAX_HEAP_SIZE 100
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
color 0F
cgminer --scrypt -o stratum+tcp://eu.wafflepool.com:3333 -u 1PdHRDrRxBsohPRJMxTa5cVLNriEbJUhdP -p x --thread-concurrency 11200 -I 13 --gpu-engine 1055 --gpu-memclock 1500 -w 256 -g 2 --no-submit-stale --lookup-gap 2 --failover-only -o stratum+tcp://backupPool -u user -p pass

[microzee]

Try using this configuration. I get 744khash with kalroth cgminer from here: http://k-dev.net/cgminer/

Code:

setx GPU_MAX_HEAP_SIZE 100
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
color 0F
cgminer --scrypt -o stratum+tcp://eu.wafflepool.com:3333 -u 1PdHRDrRxBsohPRJMxTa5cVLNriEbJUhdP -p x --thread-concurrency 11200 -I 13 --gpu-engine 1055 --gpu-memclock 1500 -w 256 -g 2 --no-submit-stale --lookup-gap 2 --failover-only -o stratum+tcp://backupPool -u user -p pass

I got it up to 670 now, getting better, using optimized cgminer. I am not using your settings though because your tc, gpu-engine, and memclock all take it down to 620.

How do I use optimized scrypt binaries? there weren't any instructions that I could find in the thread.