Mouse over Mate preview extremely slow.

Hi Everyone,

So I've recently installed two AMD FirePro V5900's running CrossFire'd on this machine and they work fantastic. There is a very noticible difference between this and my previous setups.
There is however one draw back that I have found. Whenever I select a mate in the feature tree the highlighted preview of the mated entities takes forever (In comparison to anything else, and compared to running a 6870) to show. It will often freeze solidworks for a second or two before showing. Which is annoying considering they often show on a mouse over as well. So moving the mouse over the feature tree can cause SW to freeze for a second or two.
The same goes for when you slect a part and it high lights it.

Is there a possible reason for this?

If it is it just a card/non-work-aroundable problem, is there any way to turn off these previews?

Other info:
Win7-x64
AMD FX-8120
AMD FirePro V5900(x2) in CrossFire Driver Version 8.911.3.1-120116a-132089C
AMD Vision Engine Control version 12.8

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