70 max budget (5670 GDDR5 DX11 vs 4850?)

does it have the same price? if they priced the same then you might want to pick 4850. performance wise 4850 will win over 5670 any day. if you really want to play around DX11 stuff 5670 are not going to worth it. the card was too weak to handle DX11. 4850 should do fine up to 1600x900 / 1680x1050 with high mixed with medium/low setting
 

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What about DX stuff? Such as: me purchasing a 4580, and buying a DX11 game.. Will the DX always be 'backwards compatible" for me automatically? Or would the game actually have to be made/support either of the lower DX's (10.1, 10, 9.0C) that the 4850 supports ?
 

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What manufacturer is it though ? It looks "generic" ? like no Sapphire, MSI, XFX, etc?
 


it depends on the game as well. game such as BFBC2 which was coded to work with dx9/10/11 will do as you said. but for a game that only coded with dx9 and 11 only the user with DX10 card will be forced to play the game in DX9. a few good examples for this are Dirt 2 and Dragon Age 2
 

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The 5750 is up around $120+ though. way over a budget for me.
 
I saw a 5750 for $79.99 at Best Buy. They were on clearance.

Anyway, the 5670 is a good card for the price, but the 4850 is faster. Yeah the 5670 has DX11, but it's honestly too slow of a card to try and use it. The only thing it has over the 4850 is to use eyefinity but you certainly wouldn't try to use it for eyefinity gaming unless you liked looking at slide shows.
 



Just a word of warning, the HD 4850 runs hot. So I hope you have air conditioning in the room. According to the following review the HD 48xx cards reached 86°C under load. While they did not state the ambient temperature of the room, I'm guessing it's probably around 70°F.

http://www.xbitlabs.com/articles/graphics/display/ati-radeon-hd4850_14.html#sect0
 
Yeah, forgot about the heat issues with the stock cooler. Of course, they kind of raised the clocks of the 4850 at the last minute to position it against the 9800GTX rather than the 9800GT, so they didn't exactly have time to go back and design a better heatsink for the higher clocks :D
 
86C. That would actually be quite good. I had a stock cooler 4850. I think it idled at 60-70C and reached 80-90 in games. However if you really maxed it I got it up to nearly 110C. That was in Silent Hunter 4, which had glitchy AA. After that though I got an aftermarket cooler, and it dropped load and idle temps quite a bit (40-60C). I still use that 4850 (using it right now actually). I did get a non-reference 4850 (XFX, their first ATI) and it claims to idle and run much lower (30-50C).
 

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I just bought a HIS 6750 instead.