Does anyone with some knowledge of HPs, and I suppose general power supply knowledge, give me some insight into whether changing the case and power supply would remedy this, and if the form factor of HP's motherboard will fit in a normal case (or if they use some proprietary design)
I have a similar HP i7-920 with the same MB. There were a million problems with the motherboard "truckee" when the system first came out. The solution was (1) a new MB version and (2) a new firmware load. Google to find details. here is MB spec: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01...
I'm assuming you have the correct MB version. Make sure you have the correct BIOS level, mine is dated 10/29/09 at version 5.24. Yours should be the same or later. I stop updating when the system stabilized. I ended up with 3 of these system because their rep got so bad that you could get i7-920 full systems for $500, hundreds less than part cost. All 3 are still running great as gaming systems with original 460w PSUs and upgraded video (HD5850, GTX260, HD5770).
If new BIOS doesn't help, then standard debugging is to pull parts until the system stabilizes then add them back in until it goes bad again. Could be bad video, bad memory, bad disk, MB failing etc.
Re: possible temp problem. My temps are in the 30C-60C range depending on load -- HP used a good aftermarket cooler http://www.avc.com.cn/ediy/news/news-090106.htm works well. Your temps are similar (140F=60C) ... they are not high enough to cause problems. Blow some of the dust out of your heatsink/fan with compressed air. This is not an overheating issue and going to new case won't help. And the original case is not a bad case to work in.
also this thread :...Hi, Big_Dave, I also have an HP lemon, e9180t, fighting with lots of lock-ups and BSODs. After reading your post, I disabled IEEE 1394 and no problems for almost a month now (this is a first for me). I have the 1.04 MB with 5.29 BIOS....: