Pentium D 805 - 52 on idle

M

mut

Geek Trainee
I installed a Pentium D 805 into a complete, new system.

Processor: Pentium D 805
Mobo: P5LD2 Deluxe
RAM: 1024MB DDR2 @ 667MHz
Case: Thermaltake Soprano
Cooling: Two large case fans, one small case fan and stock Intel CPU heatsink+fan.

I noticed today that my CPU's temperature had rocketed to 78*C whilst installing a game and doing other things with it too.

I'm wondering if the thermal paste is the problem, there are some holes in the paste (the heatsink that intel provided had thermal paste already on it).
When I was installing all of the components, I lifted the heatsink as it was loose - the thermal paste half coming with the heatsink, half staying on the processor.

When I look now, it looks evenly spread and I rotated the fan's position several times so that it would spread - the CPU then idling at a lower temperature.

I have not overclocked this system at all, I don't dare to. Are the CPU vcore voltages what could be causing this? I might have a look.
 
Ok, well i would reccommend replacing that thermal paste with somthing better, prefrebly AS5, it's wierd that with my Pentium 4 i had the exact same idle temperature of 52, i even changed the cooler, no change in temperature, it's possible to be a faulty temperature sensor, i dont trust Intel cpu temp readings anymore as when i felt the heatsink it was cold yet reading 52 lol, just feel the heatsink and see if it feels hot.

It's really wierd, i thought Pentium D's were really cool running cpu's, check that the heatsink is on properly, and that the fan is working ok. check your cpu voltage too and post that.
 
CPU Voltage is showing at 1.36 to 1.40 (keeps changing).
When the CPU went up to 78* I instantly shut down and removed the fan.
20-30 seconds after seeing this reading I had touched the processor and found it not to be so hot. It was very warm but nothing like 78*.
 
Yea it does sound like a temperature sensor, i would get a temp sensor and put it on the heatsink, with my AMD system, i have a temp sensor from the case going into the heatsink, then temp difference between the onboard temp sensor and the one on my case is only 2 degrees or so, so try a temp sensor, if nothing is going wrong, it should be ok anyway, unless it shut's down itself.
 
I'm using a 20-pin PSU in a 24-pin supported motherboard.
Could this be a reason why the CPU is "overheating"?
 
Hmmm, i aint sure, but if its got 24 pins, you need to use 24pins, most PSU's have a 20pin then a 4pin on the end of the 20pin that can be used too, you need to use that too i think, maybe consider a new PSU?, Infact what PSU are you using at the moment?
 
Do you not think that the thermal paste is what's causing this overheating?
I bought this CPU so that I could overclock it, but right now I won't even bother. The heatsink is definately hot, I rechecked it all.

The 805 is supposed to be a cool chip, I'm going to get a new fan for it and some new thermal paste. A paper-thin layer, correct?

CPU fan seems very stable on there, doesn't move at all. I can only guess that it's either the thermal paste or a faulty reading.
 
could be a faulty reading, but if your mobo has 24pins on the ATX 12V connector (the one usually at the right side of the ram) then all 12pins should be connected using a PSU with a 24pin connector.
 
Yeah, I thought that could be the problem, the PC runs fine, just hot :(
Im seeing if I can get the PSU replaced.

This system is for my brother (built his first so I could see how it ran - and I'm happy appart from this issue).
I've ordered mine with a better PSU (Antec / OCZ / Enermax - whatever they have in stock with decent ampage where it matters and of course, 24-Pin).
The PSU my brother has is not a recognized brand, like "POWER" with something added on the end (not powermax).
 
The 805's run fairly warm from what I've been reading, but 52*C at idle is still a bit on the hot side. If you're not crashing, then it's a reasonable assumption that the temp sensor is off. I don't know if Asus has a BIOS update to address the issue or not. Also, make sure the heatsink is secure in it's installation.
 
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