Upgrading my Ati Hd 6790, help!

[newjubs]

Hi, I'm planning on upgrading my ati hd 6790 to a better gpu, I have some cards in mind, hoping they'll go on sale on cyber so I could buy one, I was wondering if any of these cards won't work with my computer set up. I have a 500w psu and I was wondering if these cards will fit/work with my computer/psu. I think i have enough space for these cards as well but assuming I could get something a little bit larger or same size/smaller, which wouldn't fit?
Also my budget would be $180 max, not looking for anything special.
Thanks!

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127884&ignorebbr=1

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127784&ignorebbr=1

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150735&ignorebbr=1

http://www.newegg.com/Product/Product.aspx?Item=N82E16814487091&cm_re=GeForce_GTX_960-_-14-487-091-_-Product

 

[renz496]

Gtx750ti is not any faster tyan your 6790. The only advantage was power consumption which is around 60w vs 250w. Performance wise they go like this:

960 > 370 > 750ti.

Another card you can probably consider was 380 (non X). They compete more with 960 but in general a bit better than 960 in performance.