new system temperature / noise, please help!

J

james1

n00b
Joined
Apr 1, 2005
Messages
7
Hi,

I have put together a new pc and I'm concerned about the temperatures and noise - can anyone help ? I'm also wondering what the normal idle/load temps for this cpu is ? - difficult to find on the intel site.

specs:

intel 650 3.4 LGA775 2MB cache
asus p5ad2-e motherboard
1GB corsair xms2 pro ddr2-533
xfx geforce 6800gt 256MB pci-e
antec truepower 480W
antec p160 aluminium case


Ok this case has a temp. display, when i switch on the case temp is 28 deg. C

After left on for about 3 mins, the temp. gradually rises by 1 degree every minute.
It has reached 38 C , before i switch off - the pc becomes * very noisey *. :confused:
The temp of the cpu in the bios reads a constant 50C and the cpu fan speed increases.

I may also buy a new ATX2 power supply as the one i have is not recommended (ATX1).

The heatsink is the stock intel one that came with the cpu.

I'm really not sure what the problem is, something is producing too much heat and i think it's causing the cpu heatsink to go crazy trying to cool the cpu.

I'm new to building pcs, so any help would be greatly appreciated :)


thanks,

James
 
Well do you have intake and exhaust fans? (A fan blowing air in the front or side of the case and a fan blowing air out the back or top of the case.)
 
hi, the case only came with one fan at the back,(only got it this weekend) which must be exhaust. i guess i need another one - will it make enough difference do you think ? The temperature just keeps rising higher the longer it is left on.

I let it cool back down and it started from these temps: case 21 C , cpu 40C. The temps kept rising till i switch it off (makes me nervous with all the noise :eek: ) at about 50C (idle temp) the cpu fan speed reaches up to about 4500revs ,keeps rising and makes the whole case vibrate.

the psu has a fan on outside and one that blows down towards the cpu, probly doesnt help. the exhaust fan has no wires to connect to the motherboard :confused: ? only a power wire. so it cant regulate its speed.

any ideas?

thanks :)
 
Yes you definitely need an intake fan. The reason your temperature keeps on rising is because no cool air is being sucked in. You don't need to regulate the speed at all you should be totally fine if you add an intake fan blowing air in.

Make sure that your existing case fan is blowing air out and the new case fan is blowing air in. An easy way of doing this is hloding a small piece of paper behind the fan and watching if it gets sucked towards the fan or pushed away. You could also look for arrows on the side of the fan pointing in the direction the air is pushing but those are often a pain to find.
 
did you try running your compu without the side panel? also consider getting a better heatsink - Thermalright XP-120... I don't know how are the LGA CPUs but a friend of mine has a 3.2 Prescot and he was having some really high temps (like 70C) - it appeared that the heatspreader wasn't flat - it had a dent in the middle and the HS was only making contact with the edges of the heatspreader.. lapping the CPU did the trick ;)
 
To find out if your case could use better air flow, run it with the side pannel off and a room fan blowing cold air in.
This will give your CPU the max amout of cold air possible and give you the lowest temps.
With a stock heatsink & fan I would expect you to run around about 25C above air temps.
If your lower good, If very much higher then check the heatsink is on right.

Luck......... :D
 
hey thanks for all the replies :)

I've bought an intake fan which is 120mm, you were right it definately needed one!

It's a noiseblocker, which is supposed to be quiet and is a nice blue colour (though u can't see it inside the case)

I also sent back the power supply and got a new enermaxx 485W 12v ver.2. The ATX2 specification is recommended for this motherboard apparently - you get extra power dedicated to each component (also is fairly quiet)

here are the rough start temps:

CPU 43 deg. C
MB 28 deg. C
CASE 25 deg. C

after 15 minutes (idle) :

CPU 46.5
MB 33
CASE 27

i left it looking at the bios for an hour and the temps stayed much the same :)

will have to test it for high load when i get windows working.

PolishTwin: funny you should mention the Thermalright XP-120 - i was just thinking about buying one, was checking it out on silentpcreview.com. so i think i will get it :) i already have the arctic silver 5 thermal paste, so better make use of it. Cpu lapping - just googled that, looks great if it works, but i'm not sure about sanding down my heatsink yet.



I have an entirely new problem with my pc now, with installing windows 2000 and the motherboard recognising the IDE hard drive... think i better put it in a new thread though (i thought the install would be easy... now i feel like a proper newbie :) )

thanks,

James
 
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