Radeon hd 6790 vs gtx 550

IMO, never go for any of those if you're going to be gaming, at least get the GTX 560ti or HD 6950 they give great performance with a good price range

well my credits is limited... about $150. have you any sugestion???

For $150 I would suggest going for the 6850.It's faster than both the GTX550ti and 6790 and it O.C.'s nicely.

XFX 6850 $160=$130 after MIR + Free Shipping

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

You also get a free game with that card.

If you can stretch your budget just a little more this card is the best bang for your budget.And it even comes to within your budget after the MIR.You won't be disappointed,I know, I own one.

Sapphire 6870 $170=$150 after MIR + Free Shipping

http://www.newegg.com/Product/Product.aspx?Item=N82E168...