The point of this thread is more of a general discussion as opposed to "what do you recommend?" because I'm really looking at a 4890 for my new system but I can't help but notice something which, to me, seems odd...
Currently, in Australia, a 4870X2 (HIS for example) is $721. That's an el'stocko 750MHz model. At the same store I can buy a HIS 4870 Turbo (780MHz) with their fancy IceQ4 cooling system for $317. So that's a total of $634 for the pair of factory overclocked 4870s and a saving of close to $100 over the X2... Does it make sense? I understand the X2s generally out perform the CF pairs due to less latency between GPUs or whatever, but which option would you go for? I'll asume PSU requirements is about the same? The obvious advantage with the X2 is the fact that it only takes up 1x PCIe slot.
Any other major advantages paying so much more for the X2? Thoughts? Opinions?
I think that the only advantage of using a 4870x2 is that it only takes one slot.
Latency and all that other garbage do not make much of a difference. If you search benchmarks you will see that some places 2 4870 boards in crossfire perform better than one 4870x2 and somewhere is the other way around, but the difference is 1-3FPS which doesnt mean anything, so it's up to you pretty much.
I have two HD4870 1GB in crossfire and they work great.