2x R9 290 + AMD Catalyst 14.* Beta - Bad performance + artefacts

[Ponury Typ]

Hi there guys. I just updated to new AMD beta driver to get better crossfire expirence while playing games after work, but i notice really bad performance drop on mine'ing. I did fast roll back to 13.12 and everything went to normal but crossfire start to suck mose balls in games again. So my question is there any way to mine on catalyst 14.* beta without performance drops and artefacts ? And yes, i did clean install of drivers and amd app sdk.


Setup: W7 x64 + i7 4770K + 8gb ram 2133mhz + Asus Z87-Plus + 2x r9 290.

Edit:

Forgot, i use guiminer-scrypt_win32_binaries_v0.04