I can't seem to find any benchmarks with them both compared side by side. There are multiple benchmarks on the cards separately that compare it with the same cards 4870x2, gtx 285 and 295’s but they’re never on the same chart with the same settings and same system set up. I know these cards are very similar performance wise, but I’d like to see the crossfire similarities since I hear that the 5770’s scale very well.
the 4890s in crossfire will have more power than the 5770 in crossfire but they 5770 will also produce considerable less heat and need a lot less power to run them... i would go with the newer 5770 because you also get dx 11 support. 4890 is old.
get a single 5870... the dual 5770's are weak considering what you will spend, hence the fact that they are 128bit cards....
both 5770's will cost you around 350.00$ , a single 5870 will cost you around 380/390.00$ and it will blow away the 5770's ....
+1 Crossfire can be a pain sometimes because of heat and such. I had (2) 4870's and ran into heat issues. Sold them both for a 5870 and never looked back. Idles at 35C, Loads around 73C. OH SO FAST... And I can either crossfire THAT or just sell it down the road and get the next best thing.... 6870?
I've seen that benchmark already, and it doesn't pit the 5770 crossfire with the 4890 crossfire directly, it has the single 4890 and single and double 5770
Use common sense, the 4870x2 is a bit slower than the 5870. So dual 4890's are quite a bit more powerfull than a single 5870 but of course they are not as future-proof. At this point it would be a waste of money if you buy any card/cards other than the 5 series. Dual 5770's are waste of cash IMO cause once you need more firepower you are stuck with both of those cards. On the other hand if you get a 5870 you won't have to worry about upgrading in the future since all you have to do is add another 5850 or 5870. The only cards worth x-firing are 5850's and 5870's IMO... Unless you are the kind that upgrades every 5-6 years.....
My point is that if you have a budget of around 350.00$+ try and get one powerfull card instead of 2 weak cards. This way it will be easier to upgrade in the future without the hassle of selling an outdated GPU/GPU's.
Except the 5770's in CF more times than not, surpass the 5870. And who said you can't sell one or both or add another 5770 later on. Two 5770's are cheaper than one 5870 and thats badass! Instead of basing the future of the cards on early beta drivers, you should wait before talking poo poo. I wouldnt still be waiting to get a second 5770 today if it was a fail option.
I agree, 2 5770's in crossfire beat 5870 in most benchies with same drivers. Specs wise, 5770 is half 5870 but overclock better. with the market flooded with 5770's I took the plunge & picked up 2 5770's for $256 new. Haven't been happier, DX11 support & 5870 speeds for half the cost? no brainer. 4890 is old tech & old news, doesn't even compare.