ATI HD 5770 why so cheap? and better then gtx275 and hd 4890?

I found ATI radeon HD 5770 at a very low price, no more than 150€, http://www.eprice.it/Schede-Video/ [...] 9-1999894/ , but why so cheap?? and it really better than 4890(175€)?? and what about gtx275?? please help me to solve this mistake.

The HD 5770 is about the same as the 4870 and GTX 260 when it comes to raw processing power. But compared to them it offers DirectX 11 support, low power consumption, low operating temperatures, & quiet operation.

yeah, but why so cheap?? this thing bring me some worries... it about 100$ of difference

Because it is less than 1/2 the cost of the 4890 to make and probably closer to 1/3rd the cost of the 275 to make (per chip).

If the HD5770 is cheaper get that. If the same price get the HD4890 it is close to 20% more powerful but does not have DX11 support like the HD5770 which matters for Win Vista and 7

Yes what are the prices ?
Also Rolli59,isn't DX11 just important for 7 ?

Windows Vista SP2 with the Platform Update has DirectX 11. So it's important for both Vista and 7.

Thanks ,i forgot DX11 was available for Vista SP2

Go for HD 5770 and save some bucks,it can handle games fine at that resolution plus you get newer techs too

+1