How does VRAM working with APU\Hybrid crossfire?

[wannabedamned]

Question in title really.

The APU obviously uses system memory, When I put in a 6670 is there any benefit of me getting a 2gb version over a 1gb? How does the system handle the VRAM\System RAM combo?

Does the APU have a limit to how much RAM it can use?

*edit eugh "working"

 

[Orcvader]

I believe it may work just like crossfire, the dedicated RAM for the APU and the dedicated VRAM for the discrete will be copied.

You can change the amount of dedicated RAM for the APU in the BIOS if it allows you.

 

[wannabedamned]

Ta for that. I read elsewhere that there's a 1gb limit to the Ram you can share with the APU, which seems a little restrictive. I imagine getting a 2gb card to go along side it wont be slapped down to 1GB in hyrbid crossfire, as that would be stupid