I have a 5770, so the hash rate is pretty high right now... about 70 000
Seems awfully low, do you mean a 5570? My 5570 (at 800 MHz) gets about 73 Mhash/s, whereas my 5770 (at 900 MHz) gets 180 Mhash/s.
At the current difficulty, this 5570 takes an average of 63 days between finding blocks. So for your own mental health, it is probably better to join a pool and get a steady trickle of coins.
Well, i am on a mac, using Diablo, and i really have a 5770. I didn't test the others client if there are better one like this on a mac? But you make sense, i saw the comparaison chart, and i am below the usual (https://en.bitcoin.it/wiki/Mining_Hardware_Comparison
)... I think i'll have to check the other client instead of using Diablo, thanks for pointing that out ! But using a pool like deepbit is now a must (even for my 5770 card)
On my console i can see some repetitive error message like "ERROR: Invalid block found on ATI Radeon HD 5770 (#1) possible driver or hardware issue)", weird?
So i have now have to check what is the root cause of this...
EDIT: by default it run at 64, i try to add -w 128, and instead of 70 Mhash/s.i have 99 Mhash/s, but still lower. -w 192 or -w 256 throw an exeption error...