Hey, I figured I'd just update on my post here. Went with mATX size instead and got rid of that G530. I have a G2120 now.
Angels and Demons bluray, playing it in WinDVD Pro 11 with the acceleration turned on.
GPU load was quite constant at 41%, varying in the 39-41% area depending a bit on chapter.
Here's the CPU load at chapter 13, the explosion scene, stopped playback when the dude finally landed and knocked the few folks over
I've posted more about my setup in the Ivy thread, not gonna ramble about that more here.