HD4870X2 VS 2 HD4870

HD4870X2 VS 2 crossfire HD4870

this 2 graphic cards which 1 will be the best??

i will decide to buy between this 2 type.

on benchmarks x2 does scale better than dual cards and you will save some space

4870X2 is much better!! R700 means one card! And 4870 CF will has some situations. because some games will not be optimize for cross fire

Not quite sure what you mean, but games not optimized for CF will NOT gain much from a 4870x2. The 4870x2 is basically "Crossfire on a card", so there is no magical gain when CF is not supported.

However, I do agree with most when they say the 4870x2 is better than 2 4870 in CF. As it was mentioned, you save space, but mostly you save on the MB price (250$+ for an X48 vs 100$+ for a P45 ...). Moreover, the 4870x2 has an additional "bus" that allows the 2 GPU to communicate with each other, which is why it generally beats the 4870 in CF.

One thing you need to remember about Crossfire is that even if you use two 4870's with 1Gb of memory your total graphics memory will still only be 1Gb, Crossfire uses two GPU's not both cards memory.

And as I said when operating in Crossfire it does not use both GPU's memory, the 4870X2 with 2Gb of memory (1Gb per GPU) is only using a total of 1Gb of memory. I do agree with you because it would be a cheaper setup with two mainstream 4870's then it would with the 4870X2 but more costly with two 4870's with 1Gb of memory each. But I use two 4870's with 512mb and the only game I play that can't be maxed out on settings is Crysis on a 24" monitor playing at 1920X1200 but it sure still looks great and plays smooth.