4850 X2 vs 4890 vs 5770

I think the 4890 it´s better because i´ve read the 5770 it´s a 4770 with directX 11, and there are only a few games that use the directX 11 so i would go with the 4890, in fact i have one and i play really good the only issue is the crysis send 15-30 fps with all setting very high AA8x 1650x1080, but it plays very fine, if you don´t mind the benchmarks

By the way, the 4770 is not even close to the 5770.

Radeon HD 4770

Core Clock 750MHz
Stream Processors 640 Stream Processing Units
Memory Clock 800MHZ (3.2Gbps)
Memory Size 512MB
Memory Interface 128-bit
Memory Type GDDR5
DirectX DirectX 10.1



Radeon HD 5770

Core Clock 850MHz
Stream Processors 800 Stream Processing Units
Memory clock 1200MHz (4.8Gbps)
Memory size 1GB
Memory interface 128-bit
Memory type GDDR5
DirectX DirectX 11

The 5770 is a 4890 w/ Direct x11, a faster core clock speed, memory clock speed, and with a 128bit memory interface instead of 256.
Not to mention is uses something like HALF the power consumption.

Radeon HD 5770

Core Clock 850MHz
Stream Processors 800 Stream Processing Units
Memory clock 1200MHz (4.8Gbps)
Memory size 1GB
Memory interface 128-bit
Memory type GDDR5
DirectX DirectX 11




Radeon HD 4890

Core Clock 800MHz
Stream Processors 800 Stream Processing Units
Memory clock 900MHz (3.6Gbps)
Memory size 1GB
Memory interface 256-bit
Memory type GDDR5
DirectX DirectX 10.1

The 4850X2 will perform the best out of those, however some games stutter/have scaling issues. The 4890 is the 2nd best, and the best single-GPU board of your list. The 5770 is the weakest (less than 4870) but has Eyefinity/DX11.

@Samano, you conveniently forgot to bold that the 4890 has TWICE the bus width of the 5770.

well i don´t really know much about this issue, but i think all the three graphic cards are very good, they run every game who exist right now.

i would go with the 4890 (because i have one, lol), i think if you can get the 4890 X2 it´s much better because the GTA IV needs more than 1Gb of memory to run at max settingsin, but in mexico are discontinued or something like that because you can´t find one

i´ve heard that the 4870 x2 it´s better than the 4890

@sabot00: If you would notice, I did indeed list the memory interface for each card.

I have personally owned BOTH cards.
I bought XFX's 4890 at bestbuy during December and played around with it for a little over a month.

When they got the XFX 5770's in, I took advantage of their extended holiday returns (more than 30 days) and traded it in.

Within the game battle forge, the FPS benchmark which plays a segment of combat meant to stress the system showed that I gained ~25-30% increase in performance.
This may be because it is a Direct X 11 enabled game, however lets just say I'm running alot of other games on MAX settings (minus AA) that I wasn't able to before with the 4890.
And yes...I got the 5770 specifically to take advantage of the fact it has Dx11 and there IS a very noticeable difference in performance.

Alot more games are going to come out with Dx11. I can guarantee you that you WILL get better performance with a Dx11 card than without one.
Especially if you are running Vista or Windows 7.

If for some reason you are still running XP, I would recommend upgrading to 7.
During the period I had the 4890, I went from XP to 7 and I saw ~20% increase by being able to utilize Dx10 in the card.


I'd also like to state that the performance gains are not a mental byproduct of the price difference (buy something and expect it to be better because how much you spent).
#1 There is measurable difference in performance between the 2 that directly state the 5770 is better.
#2 As an employee, the employee discount caused me to only pay $3 for the newer card when I made the exchange.

No, a 5770 performs about equal to a 4870, not a 4770. A 4770 performs between a 4830 and 4850.



No, a 5770 isn't anywhere close to a 4890. A 5770 performs equal to or slightly worse than a 4870. A 4890 is about 20% better than either a 5770 or a 4870. A 4890 has double the memory bus bandwidth and many versions can overclock to 1GHz.



To the OP:
4850x2 -> best performance overall, equal to a $300 ATI 5850 in Xfired enabled games.
4890 -> best single GPU performance in your list
5770 -> dx11, lower power consumption
4870 -> cheapest price

@Samano, I said you forgot to BOLD the bus width. Also if you went from XP -> 7 you won't notice a boost because of the DX10 in the card, using DX10 features often require MORE power.

Just get this
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
New rather than open box and a very nice deal. It's DX11, very power efficient and should be very good for your resolution.

i choose 1. OPEN BOX sapphire 4850 X2 2GB $158.99 because it have double power bit