Reaper - Can't get 200Kh/s+ with 5770

[_Crash_]

Hi

I've tried running reaper with my 5770 graphics card which is dedicated towards mining and I can't get over 170Kh/s+ when scrypt mining. When I read the hardware comparison for the 5770 HIS which is what I have, I attempted the clock settings which are supposedly meant to get 213Kh/s but I only ever get 160Kh/s, even with the command line arguments. I've tried using cgminer but it keeps crashing for some reason. I'm not using the beta driver, I'm using the latest AMD Catalyst available. My main PC which has a 6870 and that's got the latest driver too, and that runs CGMiner fine.

Any ideas?

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[grad]

Try this:

worksize 128 (or 256)
aggression 17 (may be 19 - often DEATH)
sharethreads 8
threads_per_gpu 1
lookup_gap 2
gpu_thread_concurrency 3200 (or 3100)

And gpu core overclock to 910-960
my 5770 (910 ) give at 207-210 khs per sec.
Edit: need more than 1-2 gigabytes of RAM computer

[_Crash_]

910Mhz GPU Clock Speed
1200Mhz Memory Clock Speed

Reaper:
worksize 256
aggression 17
sharethreads 8
threads_per_gpu 1
lookup_gap 2
gpu_thread_concurrency 3200

I get around 170Kh/s+. I have 1.50GB of DDR2 RAM in the computer.

[_Crash_]

Anybody? 

I managed to get it to stabalize at 195Kh/s using these settings for Reaper:

Code:

worksize 256
aggression 19
sharethreads 8
threads_per_gpu 1
lookup_gap 2
gpu_thread_concurrency 3200

Then for Catalyst, I had 930Mhz Core Clock / 1300Mhz Memory Clock.

Is there anything else I can tweak so it'll hit 200Kh/s? When I start up Reaper, it goes straight up to 200Kh/s then falls back to 195Kh/s and hovers around there.