My sapphire 7950 on a computer with 4gb ddr2 cannot go past -i 13 without getting hardware errors, I've tried thread-concurrencies for hours. Currently it's only doing 160kh/s
Yes! Same problem here, what the hell is this.. Anything over 13 gives me loads of HW errors on Sapphire 7950 Boost.
need 8G ram
You are wrong. I have another rig with 4x 280X, 4 GB RAM, and it works fine. This one was just 2x 7950 and 4 GB RAM, and had the issue.
The solution is to run these cards with gpu-threads 2 and intensity 13. Getting stable 300 KH/s per card and no errors.
He's not wrong, 7950's need high TCC's to perform well. High TCC's need more RAM. 8GB recommended. You can't compare to 280x's because they work on 2 threads with low TCC's.