Which flashes better, Sapphire 4870 Silent Efficiency or BFG 8800GT OC?

Hi guys,

I've the chance to buy one of these cards to use on my Mac Pro 8core (2008 model). I searched some info about how to flash them but im a bit confused... which one flashes and works better on a Mac Pro?

FYI, the 8800GT costs me 30€ (it's from a friend) and the 4870 about 40-45€ including shipping (it's 2nd hand too).



Kind regards,
Daniel.

 

How can I confirm that?, the only thing that I know a part from the model, is that the bios is 62.92.16.00.21