Is disabling crossfire as important as disabling SLI?

[Ragnarokdel]

I have a 7990,

I cant seem to disable crossfire on it. this is the stats I'm getting. http://grab.by/q120

and the rate of shares seems off compared to 470 SLIs which gave me about 250 kh/s

I should be getting 4 times that according to cgminer but it feels off.

[pontiacg5]

Where did you hear 4 times as much? CGminer gives no estimates, far as I know.

7970's are good for ~650-750Khash if you know how to work them. With that dual card I wouldn't expect the same as two 7970's. I think you've got a bit left in that card, but not 4x as much