I ended up going to Microcenter yesterday and picking up an Intel i3-3225, a Gigabyte GA-Z77M-D3H-MVP mATX motherboard, 8GB (2 stick) Corsair XMS DDR3 RAM, and a Seasonic 400w fanless PS.
I took out the guts of my old HTPC in my Silverstone GD05b. Same HDs/DVD and tuner cards. Using the built-in HDMI on the motherboard. Windows 7 ultimate 64 bit. Loaded all the newest bios and drivers.
Seems to be working almost great......
I noticed that if I have any amount of static on my finger and touch the Silverstone case, the Display on my TV starts going wacky (Whole screen starts cycling through RGBW, or turns black). This happens while in BIOS or in the OS. Not that I should be trying to shock the case, but I can see someone dusting or touching it while loading a DVD. Anyone had this happen before? If I was going to guess I would say this is a Power Supply or MB issue. Probably more motherboard, but just wanted to see what people thought. I could try replacing the Seasonic with my old Silverstone 400w PS I guess and see. oh.. I also have one of the case fans wired to 12v/5v=7v so it will run slower. Maybe this could be causing something? Also, this didn't happen with my old MB, PS...same case..
For the HD4000 video, is there a recommended setting for using it with WMC? In Bios I have it using 1024MB ram, and Max on the other setting (can't remember the setting). I turned off dynamic contrast. I left skin tone and film detection on.
A couple of things I noticed so far.. I am bitstreaming audio. I noticed that in Windows a lot of the system sounds don't play through the HDMI. This used to happen on my ATI 5570, but seems to be more prevalent on the HD4000. I'm assuming ATI had something that kept the audio to my stereo receiver open for a longer period even when it wasn't being used? or something?
Also, when watching programs, the video seems slightly more fuzzy on the HD4000. Could be my imagination though, since I was just sitting a lot closer when I was configuring the HTPC when using the HD4000.
Any help would be greatly appreciated.