1) So do you plan to build a fanless Silent HTPC?
2) Do you plan to put this HTPC in your stereo cabinet or near the TV?
If you are building an HTPC, then you want it is as silent as possible. Hard drives are noisy, but if you chose thunderbolt motherboard then you can put the hard drives away from the HTPC.
Here is some specs of a company that makes them now. You can just use their specs and build your own for less cost.
http://www.endpcnoise.com/cgi-bin/e/std/sku=hfx_classic_fanless_pc.htmlAsus Thunderbolt Pro or the Premium doesn't have 1394 (firewire), so substitute it for this Thunderbolt motherboard.
Gigabyte GA-Z77X-UP5-TH (Intel certified for Dual thunderbolt ports. Allows up to 12 thunderbolt devices to be attached to those ports)
The case endless is only available from them in the USA. The hfx case is from Austria.
http://www.hfx.at/All their cooling has to be bought at endpcnoise.com, because they are the only distributor in the USA for Hfx.
If you plan on a passive power supply then you need to change the video card.
1) Your video card requires 400 watts, so you have to change that.
a) Passive Power supply from Silverstone only has 2 different watts available 400 or 500 watts
http://www.endpcnoise.com/cgi-bin/e/more_info/1106387.html Kingwin has a silent power supply that is 500 watts at endpcnoise.
b) Endpcnoise offers some other options for more watts.
http://www.endpcnoise.com/cgi-bin/e/std/category=Quiet_Power_Supplies.html2) SSD or Hard drives. SSD drives only use 3 watts, while hard drives use 30 watts.
a) Areca has nice Thunderbolt case, if you need lot of drives.
http://www.areca.com.tw/products/thunderbolt.htm b) Sans Digital and Promise also offer similar cases like this for Thunderbolt.
c) Sumitomo Electric Optical Thunderbolt cables
http://www.reuters.com/article/2012/04/17/idUS10018+17-Apr-2012+BW20120417 1) Possible suppliers will be Belkin or Amazon in the USA.
3) Cpu Choice depends on your needs. Here is the one that I bought and it fits your 65 watt requirement.
a) Intel Core i7-3770S Ivy Bridge 3.1GHz (3.9GHz Turbo) LGA 1155 65W (Actually, I am using the Intel 4000 for video at the moment, but I will eventualyl get a new video card in the future.)
J river Media Center 18 is going to Mac OS X, but if you plan to do that. Then you might want to follow this guide on your hardware.
http://tonymacx86.blogspot.com/search/label/CustoMac Currently only USB audio is working on Mountain Lion, but I know they done firewire devices in the past. That is if you are interested in going to Mac OS X. You can have both Windows and Mac OS X.
P.S. There is several options regarding the HTPC cases. I have used Lian Li HTPC cases in the past, but I do like the Hfx case. There is several options on the
market. The intel hd4000 cpu works great for now, but I will be upgrading to 4k video. So, I will be going to a new video card. So, your choice of the HTPC case needs to accommodate a full length video card, if you plan for that in the future. There is other options if you don't want a video card that takes up dual slots like most consumer cards. The other option is the Professional cards like firepro. These cards do more Hz for 3d in 4k, and at less watts.