refillable :
where do you find it saying it's possible???
Hybrid CrossfireX :
Boosted Performance with onboard GPU and discrete graphics card
ATI Hybrid CrossFireX™ technology is a unique hybrid multi-GPU technology. It takes your gaming experience to the next level boosting PC performance by enabling the chipset’s integrated graphics processor and a discrete GPU to operate simultaneously with combined output for blisteringly-fast frame rates unleashing the graphics performance (For Windows Vista or later versions)
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The official slogan for Hybrid CFX is : Boosted Performance with onboard GPU and discrete graphics card, it does not say that only ONE graphics card can be used, namely the AMD/ATI Radeon HD3450, this is the only card that can 'unleash' the Hybrid CFX on this board, so the Hybrid CrossfireX on this board is 'pretty useless'.