remember you need to delete .bin files create by the reaper compilation, after any change made on the .conf files, otherwise it will not apply the changes.
reaper v13b4 creates a new bin for concurrency and share threads, no need to worry about deleting 
Topic: [Need] Reaper v13 config for successful LTC mining with Radeon 7970 (Read 7748 times)
July 11, 2012, 12:09:09 AM
remember you need to delete .bin files create by the reaper compilation, after any change made on the .conf files, otherwise it will not apply the changes.
July 10, 2012, 10:01:58 PM
I also got about 530kh with more severe overclocks but the extra 75 watts or so was too much for me
July 10, 2012, 09:59:15 PM
Here is the best I could get
at 975 core
1375 mem
1.034 v
set with afterburner
litecoin.conf
worksize 256
aggression 13
threads_per_gpu 4
sharethreads 18
lookup_gap 2
gpu_thread_concurrency 8192
Anything over 13 aggression causes nothing but stales for me
475 k/h
about 125w with undervolt per card
at 975 core
1375 mem
1.034 v
set with afterburner
litecoin.conf
worksize 256
aggression 13
threads_per_gpu 4
sharethreads 18
lookup_gap 2
gpu_thread_concurrency 8192
Anything over 13 aggression causes nothing but stales for me
475 k/h
about 125w with undervolt per card
July 09, 2012, 01:24:55 AM
try
aggression 17
gpu_thread_concurrency 8192 ((note: GCN has 64 threads per CU, and 7970 has 32 CU so 64 threads * 32 CU = 8192))
sharethreads 8
lookup_gap 2
I've seen a few people also recommend gpu_thread_concurrency be 32768 (4*64 work items per CU), so try that too
aggression 17
gpu_thread_concurrency 8192 ((note: GCN has 64 threads per CU, and 7970 has 32 CU so 64 threads * 32 CU = 8192))
sharethreads 8
lookup_gap 2
I've seen a few people also recommend gpu_thread_concurrency be 32768 (4*64 work items per CU), so try that too
July 09, 2012, 01:14:20 AM
I am getting like 90% GPU errors with Reaper v13 and default litecoin.conf parameters. Lowering aggression to 12 reduces hashing speed to 250kh/s.
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