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are crossfire and sli the same?

The hint is in the name ;)

No they aren't the same, as you elude to anyway xfire is for 2 ATI cards, SLI is for 2 Nvidia cards

Under full specification of your mobo it says "Crossfire Support Only"

You can get mobo's that support both and I think I have seen things about hacks to force a mobo to support the other format, but I don't know much about that personally.
 
According to the webpage for your mobo on the Asus website:

http://www.asus.com/Motherboards/Intel_Socket_1155/P8P67_PRO/

Quad-GPU SLI and Quad-GPU CrossFireX Support!

[ATI crossFireX] [NVIDIA SLI Ready] Flexible Multi-GPU solutions, Your Weapon of Choice!
P8P67 PRO brings multi-GPU configurations through both SLI™ and CrossFireX.
Click to expand...

edit: I think I have the wrong mobo actually... yours doesn't have 'pro' in the name.
 
DrewBrees said:
No, mines the LE version unfortunately. a multi gpu setup could be quite expensive for me then, less i change me mobo. thanks.
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Plus this current mobo has 1x pci-ex16 and a 1x pci-ex4 slot, now I know x8 slots have very little drop off in performance from a x16 / x16 , but not sure how a x4 slot would impact performance.

Your best bet if you want to get a 2nd card would be sell that mobo and get another.

Oh I see its sandybridge, so you would mainly get one with x8/x8 SLI anyway
 
DrewBrees said:
so i need a new mobo with at least 2x8 pci express slots?
Click to expand...

What you will find is the mobo will have 2 x16 pci-e slots - so when you use 1 of them the card will be at the full x16

*but* when you use both slots they will then only both run at x8

Like this one http://www.overclockers.co.uk/showproduct.php?prodid=MB-170-MS&groupid=701&catid=5&subcat=1906

Its something specific to the new sandybridge mobo's at the moment that they cant do full x16 / x16 in SLI - but i guess later revisions / newer boards will address this.

But as said before, the performance drop in having x8 is very small, 1-2%

Oh, and check the mobo says Nvidia SLI capable as well
 
DrewBrees said:
I still dont see how sli and crossfire are different. i have 1xpci16 and 1xpci4x slots and dont see how two cards wont fit in the same slot.
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They're different because the technology belongs to 2 different companies.

The cards will physically fit but unless the board has been certified by Nvidia, and a licence fee paid by the manufacturer, they won't run in SLI.
 
The ability of a motherboard to run SLI or Xfire is software driven not hardware afaik

So its not about the card not physically fitting into the board, its about the software not there to run it
 
billysielu said:
They're not the same, but they are both unstable.

So there's no real benefit to supporting them.
Click to expand...

Trolling?

My GTX 460's are perfectly stable in SLI thanks very much :p

As above, it's not a hardware thing whether SLI will work or not, it's
whether the motherboard manufacturer has paid Nvidia for the license to do it on that particular board. There are hacks to get around it, but you can then have problems updating graphics drivers
 
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