I have an Asus P5K Pro mobo with an E2160 (oc'd to 2.93) cpu along with a radeon 4850 hd card. I'm looking at upgrading to a radeon 4870 card. Can I use the two in crossfire because they are so similar? or is that not possible. If it is, what PSU would be needed?
But i dont recommend it :
A note about Motherboards:
The last one is 16x 4x, this one is the weakest and doesn't perform very good compared to dual 8x or dual 16x,so i won't recommend it for Multi-GPU configuration. Intel P35 and P965 chipsets support Multi-GPU at 16x 4x mode.