Tried the voltage drop myself last night and it made a huge difference. Currently my computer sits at 41C with the 5v fans and running mediaportal/DVDs.
Dropped it straight to 1.125v and seems pretty stable. I'll run prime95 tonight to be sure it can handle things but the system seems pretty stable to me.
Hopefully just need the HD silencer now and I'll be done with hardware changes (just need to get software configured correctly). Pretty happy at the moment with the temperatures in the case :-)
Also just swapped in an 8500GT but getting issues now with overscan (DVI-HDMI) that I wasn't getting with a straight HDMI-HDMI from my onboard radeon 3200.
It seemed to be working perfectly last night (apart from overscan) but this morning I seemed to be getting ghosting and/or pauses (depending on the channel) on DVB-T!?
Need to recheck things, I am not sure hardware acceleration is working correctly *sigh*.
Nety: I did one more drop to and got to the same voltage.
You realise you will have to put the HDD in the centre below the optical drive? Reading yesterday I will look at going the 2.5" drive eventually and using suspension to hold the drive.
As for the overscan are you getting it in media centre as well? I get overscan on the desktop but it is 1:1 pixel mapping but in media centre it allows for the overscan so is correct. But then my TV is a little odd in that it is running true 720p unlike almost all LCD's.
elkano: I thought that picture in your signature looked familiar :-)
Maybe the NZ model is slightly updated compared to the USA, they are quite sure it doesn't support it.
Mind you, I do recall the NZ model had some improvements (PIP for one).
What zoom mode are you using on the TV Nety?