Can I Crossfire?

[machinebummer]

Hi guys

Just wondering if I could ever go the Crossfire route with this motherboard:

The Asus P8H67-M PRO

http://www.overclockers.co.uk/showproduct.php?prodid=MB-050-AK

Well I gather I can go Crossfire but would it even be worth it, because I notice the other PCI slot only runs at x4 or 8 or something other than the x16 for the main slot. Would it be a total waste if I ever got another 7950 to slot in there.

Rest of my specs

i7 2600
Asus P8H67-M PRO
16GB RAM
HD7950

Cheers

 

[wazza300]

Expansion Slots: 1 x PCIe 2.0 x16 [blue] (at x16 mode), 1 x PCIe 2.0 x16 [black] (at x4 mode, compatible with PCIe x1, x2 and x4 devices), 2 x PCI

second pci-e runs at 4x when first pci-e is populated

idk if it would hinder that cards performance is its a powerfull card,if it was 8x then id say no,but 4x?

 

[machinebummer]

That's what I was thinking.

It has "ATI Quad-GPU CrossFireX ready" on the box and
"Multi-GPU Support: Supports ATI® Quad-GPU CrossFireX™ Technology"
on the above page, but why if its going to run it so poorly?

Anyone with this board running Xfire ok?

Or is it mainly for lower powered cards like 2 5450's or something?

 

[ALXAndy]

For £89 don't expect miracles.

I wouldn't bother personally.

 

[wazza300]

it will run any cards in xfire but the second card no matter how powerful will run at 4x speed and its this that you need to find out about,how much it will affect that cards performance ect

 

[Surveyor]

This will give you an idea of the difference between x8/x8 and x16/x4:

Does CrossFire Work At x16/x4?

Your additional problem is you have a processor you can't overclock so that may also hinder CrossFire performance.

I think in the test above they use a stock speed i7-2600K but you may need a bit more CPU power for Crossfired HD 7950's.

 

[machinebummer]

Will give that link a read now thanks Surveyor

That was also going to be another question about my CPU.

I know I can't overclock it like the K models but using the Asus Turbo Boost which is all I've tried it goes up to 3.9Ghz, I think. I did a little reading that they could maybe get up to 4.2 or more by changing the BLCK's? if I recall. Anyone know if that's possible/safe?

Sorry that should have probably been in another thread

Thanks Guys

 

[Surveyor]

Changing the Base Clock is not recommended for Sandy Bridge processors.

From OcUK:

- Do not overclock with BCLK, again doing so could limit lifespan of the CPU

 

[machinebummer]

Changing the Base Clock is not recommended for Sandy Bridge processors.

From OcUK:

Aaa ok cheers again Surveyor