The problem though is that the time I will need a new card the hd4850 won't be on the market, so I'll have to replace my current card (which I'm trying ot avoid).
Anyway, IF I buy a new card it'll probably be XFX HD4850 xXx Edition, which immediately rises another question.
"Sapphire HD4850x2" and "XFX HD4850 xXx Edition" are both double sized cards
(I don't know the right term, I mean that each one of them takes place for two expansion cards). There is enough space between the two neighbour PCI-E slots to fit the two cards but the fan of the one is kind of bloked by the other, there would be only a narrow gap between the two cards.
will that be a problem for the "blocked" card cooling?