crossfire question

karl01 · 18 Nov 2009 at 21:09

Ive got a old motherboard
An asus P5Q PRO (p45) socket 775
Its got 2 PCI Express lanes one i no is definialty 16 lanes but not sure about the other one does the colour of the PCI Express socket tell you how many lanes it is? I want to get 2x5770 in cf can anyone tell me if i can crossfire with this motherboard?.

RJC · 18 Nov 2009 at 21:39

The board supports crossfire at dual 8x, the second slot I think will run at 8x regardless if the slot is in use.

karl01 · 18 Nov 2009 at 22:01

So if they both run at 8x speed is this going to effect the overall performance or i am still going to see a good performance?

RJC · 18 Nov 2009 at 22:24

Compared with dual 16x boards there is a performance drop off I think around 2 -5 %, but you will see a performance boost over a single card.

karl01 · 19 Nov 2009 at 00:00

2-5% i can live with that going to order now cheers pal.