Anyone experiences hash rate halving with newer drivers?

Was playing with 13.10 beta and it's great for games, but makes my 7970 hash at 370kh/s with my known good settings (600kh/s).

My card sucks btw, I can't get it over 625kh/s...tried bios flashing, different driver versions, added system ram.
Any thoughts?

System specs:

Gigabyte 7970 Windforce OC rev 1.0
i7 3820
2x2gb ddr3
Corsair tx750 psu

Win 7 64 bit pro
Catalyst 12.8 (tried a bunch)
Stock gpu bios...tried sapphire, other giga models.