Crossfire Overclocking

[ZainJ51]

So I just put a 7950 in Crossfire with my 7970 and the core clocks stock are at:

 

7970: Core @ 925 mhz --- Memory @ 1375 mhz

7950: Core @ 925 mhz --- Memory @ 1250 mhz

 

How would I go around overclocking the 7950? I can stable at 1100 Core & 1600 Memory on my 7970 and its fine.

 

Do I have to run it at the same speeds or? 

[dragoon20005]

CrossFire will match the speeds of the lowest card

 

the HD7970 will downclock to the HD7950 speeds

[ZainJ51]

CrossFire will match the speeds of the lowest card

 

the HD7970 will downclock to the HD7950 speeds

So the max overclock I can get on the 7950, the 7970 will run at that?

[RevoltTrain]

CrossFire will match the speeds of the lowest card

 

the HD7970 will downclock to the HD7950 speeds

This

[dragoon20005]

So the max overclock I can get on the 7950, the 7970 will run at that?

yea that how it works

[ZainJ51]

yea that how it works

Oh okay, and I get the two same cards (7970 and 7970) the clock speeds should be the same if i OC them the same

[Sauron]

So the max overclock I can get on the 7950, the 7970 will run at that?

 

Yes, and only a part of the gpu will run - it will be the same as having two 7950s at the lowest clock of the two. Try reaching the highest stable overclock that both cards cn handle and call it a day.

[dragoon20005]

Oh okay, and I get the two same cards (7970 and 7970) the clock speeds should be the same if i OC them the same

yea it good idea to have the two same GPU series for best performance of CF

[xAcid9]

I suggest overclock the 7950 around +80mhz higher than the 7970.