OCZ SLI-Ready Edition 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400)
Rosewill R379-SM Black/ Silver 0.8mm SGCC Steel MicroATX Slim Case Computer Case PSU ATX12V Flex 300W Power Supply
SAMSUNG Spinpoint F1 HD103UJ 1TB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive
my own cd rom
my budget is around 400$
will only be watch 1080 hd movies on it and sometimes when friends come over play some low ended games like warcraft 3 ft
the price is about the same, which build will do the job better?
I agree with those above but I think you should be looking at a different CPU. The black edition processors are nice if your going to overclock but what you want for a HTPC is something that's not going to create a lot of heat. Most of the encoding/decoding duties are handled be the GPU so you don't really need a ultra fast CPU. I might suggest something like the X2 5050e with it's Thermal rating of 45w and 2.6GHz speed.
To the OP:
I would just go with a micro 780g board instead of the 790gx and save a ton of cash. the 790gx is meant for gamers, not HTPC's. The 780g has almost as good integrated graphics and is much cheaper, and it means you can build in a SFF case as well, I think there is only like 2 790gx boards in a mATX FF. I mean unless you think you actually need 7 expansion slots for your HTPC... http://www.newegg.com/Product/Product.aspx?Item=N82E168...
xthekidx is right. I'm not sure if it was toms hardware that did the review but the 780g paired with a bottom sucking sempron was able to decode blu-ray just fine. Also i've seen a few nice low profile 9500gt and 9800gt if money wasn't to big of a concern...just in case you wanted to game in your home theater.
I am pricing out a similar build myself. I like the 790gx. As others have said, go with a low power CPU. My build is almost identical to batuchka's above. I am going to go with the same mobo/CPU combo, hdd, and PSU.
As some have said, you can also save some money with the 780g chipset. I considered 780g as well, but I want the ability to set up a raid 5 array. However, if you are not interested in raid 5, there isn't really a good reason to go with the 790gx over the 780g.