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AR15.COM
3/14/2010 9:00:38 AM EDT
I'm in the process of building a new PC, the last one I built was about 6 years ago.


Anyways I have a question about ATI's Crossfire system. If I want to run to video cards in Crossfire that are PCI 2.0 X16 my mobo has to have 2 PCI 2.0 X16 slots correct? Only reason I ask was I was given a free ASUS mobo that has two PCI 2.0 slots but one is a x8.
3/14/2010 10:07:29 AM EDT
[#1]
Either it won't work, or both will default to the slower rate.
3/14/2010 10:57:45 AM EDT
[#2]
Looks like i Have to pick up a mobo then,

Thanks
3/14/2010 5:57:46 PM EDT
[#3]
How much are you looking to spend?  Instead of laying out potentially $300-$600 for a pair of Radeons AND a new motherboard just to run Crossfire, you can pick up a single card for under $200 that will run almost anything under the sun as fast as you'll need it to go (unless you're trying to play Crysis on a 30" panel).
3/15/2010 3:12:58 AM EDT
[#4]
i ran an sli (nVidia) rig that run at 8x and it was an asus board, it did alright with some tweaking. sli/crossfire to me is just a waste of money, that was the first and last multi gpu system i will build. next gaming pc i build will be a good high end single video card.
3/15/2010 3:08:18 PM EDT
[#5]
I want to do some gaming with it and my wife will be doing video and photo editing on it. Also want to build something I won't have to upgrade for a few years/
3/16/2010 3:48:35 PM EDT
[#6]
Drop $150 on an ATI 5770 and you'll be plenty future-proof for a few years.  And, with photo & video editing, your CPU will be the bottleneck there, not the graphics card.
3/17/2010 10:37:42 PM EDT
[#7]
5770 user here. It looks great on my 42 inch flat screen tv.
3/18/2010 2:53:40 PM EDT
[#8]
This is somewhat the setup I have been thinking about building, its been a while since I built a PC.

Antec Three Hundred Black ATX Mid Tower Case
Undetermined Power supply, I need to research
ASUS M4A79XTD EVO AM3 ATX AMD Motherboard
ATI 5770 Video card
AMD Phenom II X4 955 Black Edition Deneb 3.2GHz
8gbs of  DDR3 OCZ AMD Black Edition
A good CPU fan setup
And I still have to figure storage out, don't need more than 500-600gigs but want to run several hard drives to back up files
3/18/2010 3:03:55 PM EDT
[#9]
You should be good if you stick with cards from the HD4xxx family.  PCIE 2.0 x8 has more than enough bandwidth for a single (non X2) card.   In theory full PCIE 2.0 x16 would be better.  But as long as you stick with a single GPU card you should be fine.  I am sure the 5xxx series should be fine as well, but if anything you will take a minimal performance hit.