System: E6600 2 gb ram - Gigabyte 7600 GT fanless video card, WD 150 gb raptor, Lian Li aluminum case w/sound dampening material.
I cannot figure out what is up w/my temperature probe. Last week my power supply (an antec semi-fanless model) blew out, perhaps due to a power surge during a reboot - (a bulb on my lamp was fried at the same time). I had the PS replaced with the TriPower Antec 650W PS. I monitor the temperature of my components with PC Probe II (latest version) and Everest Ultimate. I am running Vista. There is an admitted problem w/the airflow in my Lian Li case which I have tried to compensate for.
The problem is instead of a CPU fan, I have a one of those giant heatsinks that is connected by a rubber duct to the 120 mm back case fan which pulls the hot CPU air out of the case. This solution seemed very novel at the time and keep the CPU running at low temperatures for the most part. But that commandered case fan is no longer fulfilling its role in exhausting other hot air from the case.
To aggravate matters, I have one of those Gigabyte silent pipe GPUs and myLian Li case has only one other exhaust fan which is far removed from the mb so the hot air is not exhausted from the case. The result has been very high mb temperatures. Until last week, I just left the case open and had a small 6" table fan blowing air directly into the chassis. This kept temperatures at a reasonable level. After the PC wouldn't turn on, I took it to a repair tech who wired everything back together and put in the new PS. He connected my faux CPU fan and the other case fan to the power leads on the new Antec PS and told me everything would work fine.
With the case closed, the temps skyrocketed. I noticed the mouse cursor bouncing around which I had seen in the past during overheating. When I turned the temp monitors back on, the numbers were alarming. It was a very hot day here as well. The MB temp was 75C, the CPU was 45, the cores were higher, the hard drive was 48 C. As soon as I took the cover off the case and turned my small desk fan on the mb, the temps dropped precipitiously.
I then tried putting the case back together and aiming the fan thru the holes in the 5.25 drive bays. Again, the numbers were OK, very low in fact. However, when I left the fan on at the higher speed, he motherboard numbers went down to 1C. I figured this could not be good. On the other hand, when I left the fan off, the mb numbers climbed within about 10 minutes to over 100C. This just didn't seem right to me and it even occured w/the case open and the room cool. I started doubting the numbers.
The system is stablilized and I am looking next week to mount a special bay fan enclosure that pulls air into the case, but I noticed today that the CPU (not the cores) and MB temp stuck at 24 and 38C respectively. They did not change for hours. When I rebooted (soft reset), the bios showed 24 and 38 even after I had turned off the small fan blowing air into the front of the case.
I then shut down the PC completely. On reboot, the mb temp was 50C, what I would have predicted w/the fan off.
Now I question the reliability of the all the sensors on my system. I think they are generally correct. However, I would be interested in comments about what might be happening here. As I write this message, the temp of the CPU is shown as 66C while core 1 is 32 and core 2 is 31. Is this possible? And all I have been doing is typing.