Problem 500kh/s with 7970

[Ketill]

Hi everyone, i got a Sapphire 7970 stock (like this one : http://images.anandtech.com/doci/5319/sapphire_7970.jpg )

I try a lot of configuration but she can't get over 500kh/s, my actual .conf :
--intensity 13 --shaders 2048 --thread-concurrency 8192 --worksize 256 -g 2 --gpu-engine 925 --gpu-memclock 1375 --gpu-powertune 20

Can't go higher on TC or HW appears.

I try some flash with other BIOS but when i launch my rig, it say "No AMD driver detected" (or something ike this, if i reboot on normal bios it's ok). Should I uninstall drivers before flashing my GPU ?

I try on BAMT, same hashrate.

So what is the slution for this ? Should I try other BIOS ? Which one ?

Thanks a lot and sorry for my pretty bad english

[JohnDorien]

Is it a vapor-x? Had the same shitty hashrate.

For some strange reason it started hashing at stable 730 when i undervolted... maybe you want to try this

[Ketill]

No it's not a vapor-x see the photo.

I undervolt under AMD Catalyst Control Center ? Which undervolt for your 730kh/s ?

[JuanHungLo]

Been there, done that.

If all else fails I recommend COMPLETELY uninstalling all AMD drivers and SDK.  Use something like tuneup utilities to remove all traces from the registry.  Then reinstall ONLY the drivers from AMD Catalyst™ 13.11 Beta Driver for Windows and then ALL of AMD-APP-SDK-v2.9-Windows-64.exe.

Then use the following settings:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer.exe --scrypt -o stratum+tcp://gigahash.wemineltc.com:3334 -u pool user name.1 -p password --thread-concurrency 8192
 --intensity 13 --queue 0 --worksize 256 --auto-fan --temp-target 80 --temp-overheat 90 --temp-cutoff 95 --gpu-engine 1050 --gpu-memclock 1500 --gpu-vddc 1.2 --no-submit-stale -g 2 --lookup-gap 2

If successful, then start lowering the gpu-vddc a little at a time until you get HW errors.  You should get 730 Kh/s easy.

[Ketill]

Been there, done that.

If all else fails I recommend COMPLETELY uninstalling all AMD drivers and SDK.  Use something like tuneup utilities to remove all traces from the registry.  Then reinstall ONLY the drivers from AMD Catalyst™ 13.11 Beta Driver for Windows and then ALL of AMD-APP-SDK-v2.9-Windows-64.exe.

Then use the following settings:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer.exe --scrypt -o stratum+tcp://gigahash.wemineltc.com:3334 -u pool user name.1 -p password --thread-concurrency 8192
 --intensity 13 --queue 0 --worksize 256 --auto-fan --temp-target 80 --temp-overheat 90 --temp-cutoff 95 --gpu-engine 1050 --gpu-memclock 1500 --gpu-vddc 1.2 --no-submit-stale -g 2 --lookup-gap 2

If successful, then start lowering the gpu-vddc a little at a time until you get HW errors.  You should get 730 Kh/s easy.

400kh/s

:/

[Vivisector999]

Download Trixx  here:  https://www.sapphireselectclub.com/ssc/TriXX/

Trixx has all the controls to change the voltage and clocks on your card. 

Next:
Bump the gpu engine to 1055, bump the memory clock to 1500.  Adjust the voltage until you can run it for hours without hardware errors (Takes a but of playing around to get it perfect).  On my card it is 1.175 V.  Might be different on yours


Here is my .bat after all those changes.

setx GPU_MAX_ALLOC_PERCENT 100
cgminer.exe --scrypt -o netcodepool.org:3333 -u user.name -p password --thread-concurrency 16320 --gpu-engine 1055 --gpu-memclock 1500 --no-submit-stale --intensity 13 --worksize 256 -g 2


My card with those settings usually gets around 720-730.   When I first started before Trixx, I was getting around 500 as well.