Powercolor HD 5850 343 MHash/s @ 900/401 wont do 400 EDIT: will do 300 and 350

[sanchaz]

Powercolor HD 5850 343 MHash/s @ 900/401 wont do 400
Using afterburner.

So i managed to get my 5850 to 900 with mems at 1000 stock voltage.
Then when i went to lower my mem clock i put it at 400Mhz and it gets all weird with funny colors and distorting the image, if i put it at 401Mhz everything is ok.

Any ideas?

EDIT: so i just went ahead and said what the hell 400 doesnt do it lets try 300. it works. so does 350 but 399 simply doesnt as 400 also doesnt. 401 is ok. 375 small glitches are visible. look like 370 is ok. so it looks like it doesnt like range from 370-400. :S wtf.

[sanchaz]

and these values ok?