What I've noticed, is that for my 7950 cards best H/s are attained when I set GPU_MAX_ALLOC_PERCENT 80 for all cards (7870,7950,290). Otherwise there is too much video memory allocated for 7950 (some 2.6GB), which results in decreased performance. Optimal value seems to be 1797MB for 7950. Cannot check the values for 7970 as I don't have one.
Confirming this.7950@1200/1500, windows 8.1, 14.6 drivers and opencl dll's from 13.12
Max percent at 100, around 310h/s
Max percent at 80, around 335h/s
Good find Aney!
