Worth getting another 4870 for Crossfire?

[obiwanquinobi`]

Guys,

I already have a single 4870 1GB and have a Q9550/P5Q Deluxe. I know this board supports Crossfire so is it worth the extra £110 put another one in there? Or should I sell on the single 4870 and get an 4870 X2 (Smaller footprint, less power etc) What would I expect to get for a second hand 4870 1GB?

I do have ample power supply(s) so thats not an issue

 

[obiwanquinobi`]

Hmm. Well, If you do buy a 4870x2, Am I correct in thinking you can crossfire that with another 4870x2? If so, that means you get that option in the future too.

I think you can do that yes. For a single 4870 x2; how much performance gain over a single 4870 1gb?

Imagine the power 2 X2s would draw?

 

[obiwanquinobi`]

Or for around 150 you can buy a 4890 and sell the 4870.

How much better is the 4890 over the 4870? Surely can't be a great deal, non?

 

[obiwanquinobi`]

Just checked and no not that much increase, about 20% speed-wise ..... sorry I remembered the figures wrong

But it might be worth crossfiring 4890s which will last you most till near end of next year.

Hmm...May just wait until the next gen cards come out to be honest. 20% isnt that much of an increase and I'm not sure that Crossfire will give me much more.

I wonder if anyone out there has gone from a single 4870 to Crossfire. Would be good to get some idea of the performance gains?

Cheers for the replies so far.

 

[obiwanquinobi`]

Cheers guys. Think I may go for the second 4870 1GB.

 

[obiwanquinobi`]

Would be tempted to get the 4870x2 2048 if cheap enough and sell your 4870 for a good price since you will have 8x 8x pci-e slots with p45 based board. (Perhaps not that big a deal since its pci-e 2 though!).

What would a second hand 4870 1GB sell for. It's a Powercolor card? Would the 8x PCI-E lanes be a bottleneck when using dual cards?