5850 vs 275

I don't know about the Dark effect...But I would say that HD 5850 is much better performer than GTX 275.

Any of those cards will max out source.
So If you play only 1 game then GTX 275 is the way to go...Otherwise HD 5850 no doubt.

And yea...If you are thinking of saving some money u can get HD 4890 which gives same performance as 275 but cheaper...

A 5850 is slightly better than a GTX285...so it is about 1.5 tiers above a GTX275.

GTX275 ~ 4890 < GTX285 ~/< GTX285

http://www.tomshardware.com/reviews/best-graphics-card,...

But for CS: Source and older games, you really don't need a powerful GPU. The 5850 costs around $290, and GTX275 costs around $260+.

You can just get a 4870 1GB for ~$160 or a 5770 1GB for ~$170.