In the source engine, the X800 can perform HDR, because it is a SM 2.0 compliant method of HDR.
The X800 is also the fastest card of the three.
Avoid the 6800 XT entirely, it's crippled to 8 pipelines. The 7600 GS is good, but the X800 GTO is probably faster. Yes, fast enough for HDR in the source engine.
If you want HDR then get the 7600gs. DON'T get the 6800XT. It's crap compared to the other two. If you only care about HDR in HL2, check out this link. While the X800XL and X850pro don't have the newer features, they perform a bit better than the 7600gs and x800gto, and are really cheap. http://shop.ati.com/searchresults.asp?dept_id=39
In the source engine, the X800 can perform HDR, because it is a SM 2.0 compliant method of HDR.
The X800 is also the fastest card of the three.
Avoid the 6800 XT entirely, it's crippled to 8 pipelines. The 7600 GS is good, but the X800 GTO is probably faster. Yes, fast enough for HDR in the source engine.
Best out of the 3, and the cheapest i believe too. Try www.newegg.com, or ati.com under the clearance section. Both have great deals on them.
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