I got my HD7870 MYST Edition from Newegg today. It took some work, but I finally consistently over 400kH/s using reaper with this card without crashes or high number of invalids.
Using AMD Overdrive section of Catalyst 13.3beta - Set GPU clock to 855MHz, Memory 1500MHz. There may be better values. This worked for my setup.
I also had to edit a couple lines in reaper.conf
Finally, here is my litecoin.conf
I get a steady hash rates >400kH/s. You can increase the aggression to 19 or so to increase the hash rate slightly. For me any other cpu_thread_concurrency value seemed to cause either hardware errors or invalids.
I got similar has rates with cgminer by setting using the following command line arguments, but it wasn't communicating with the pool correctly for some reason. For now, I am sticking with reaper.
If this works for you, great. Feel free to send that 10ltc bounty my way
If anybody finds a better configuration. I'd love to see it.
Using AMD Overdrive section of Catalyst 13.3beta - Set GPU clock to 855MHz, Memory 1500MHz. There may be better values. This worked for my setup.
I also had to edit a couple lines in reaper.conf
Code:
kernel reaper.cl
save_binaries yes
enable_graceful_shutdown no
long_polling yes
platform 0
device 0
mine litecoin
save_binaries yes
enable_graceful_shutdown no
long_polling yes
platform 0
device 0
mine litecoin
Finally, here is my litecoin.conf
Code:
host notroll.in
port 6332
user user.1
pass 12345
protocol litecoin
worksize 256
aggression 18
threads_per_gpu 1
sharethreads 24
lookup_gap 2
gpu_thread_concurrency 16384
port 6332
user user.1
pass 12345
protocol litecoin
worksize 256
aggression 18
threads_per_gpu 1
sharethreads 24
lookup_gap 2
gpu_thread_concurrency 16384
I get a steady hash rates >400kH/s. You can increase the aggression to 19 or so to increase the hash rate slightly. For me any other cpu_thread_concurrency value seemed to cause either hardware errors or invalids.
I got similar has rates with cgminer by setting using the following command line arguments, but it wasn't communicating with the pool correctly for some reason. For now, I am sticking with reaper.
Code:
cgminer --scrypt -o http://notroll.in:6332 -u user.1 -p x --shaders 1536 --intensity 18 --worksize 256 -g 1
If this works for you, great. Feel free to send that 10ltc bounty my way
If anybody finds a better configuration. I'd love to see it.