I currently have a CG5270-BP003 Asus (got it for $186 BNIB) that has a single slot PCI-e 16x in it running an Asus EAH 4850 TOP 512mb that I added.
I am happy, but just got a ridicolous deal on 2 brand new XFX 4850 1GB cards. $85 each =)
I also got an unfinished barebones setup to get rid of this ridiculous case that the BP003 comes with... It came with an Asus P5KC mobo BNIB, Antec 900 BNIB, and a Zalmann cnps cooler BNIB.
My question is this :
Being that the P5KC has 1 PCI-e 16x (blue) and 1 PCI-e 4x (black) and is crossfire certified, will this motherboard run the 2 XFX 4850's in crossfire mode perfectly?
Should I just sell the motherboard and buy a different one that has 2x PCI-e 16x slots with crossfire or will I not notice a difference worthwhile?
I may just sell or return the XFX cards and get a MSI Cyclone 4890 OC and not do anything with the motherboard at all... but I think 2x 4850s will outperform that setup.
Yes you will be able to use CrossFire on it but since it supports crossfire at 16x4x then i don't recommend it because 16x4x doesn't perform as well as dual 8x/16x so if you want to upgrade then get a better single card,here is a good review which compares 16x4x dual 8x and dual 16x: http://www.tomshardware.com/reviews/crossfire-pci-expre...
Sell P5KC and get a new motherboard with dual 8x or 16x support and run dual XFX 1gb 4850's.
Sell P5KC and keep factory motherboard and get MSI Cyclone 4890 OC 1GB
Although getting another 4850 will give you a boost but it costs more so getting a 4890 and keeping your motherboard costs less however if you don't have problems running your games then why do you want to upgrade ?