How cool should the cpu be?

Likuid76

Member
Dec 16, 2001
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Sup all,
well, i am kind of new to the custom comp world. I am just hoping someone could tell me:
What is the max temp. my cpu should reach? how about the motherboard?
What should the cpu/case fan threshold minumum be?

at this moment i am running a
Asus A7V266-e
Athlon 1800xp
Dragon Orb
and two case fans
Win XP

I am monitoring my case with Asus Probe
I am not overclocking yet... hopefully i will once i learn more.

hopefully someone can help.

-=Likuid76=-
 

Egrimm

Golden Member
Jun 26, 2001
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Yes, the max for Athlon XP is 90C from the on-die sensor, but since few mobos use that it doesn't help much.
For mobos using the socket thermistor, very inaccurate as it is, it is a rule of thumb that it should never get near 60C, below 50C is much preferable.
For case temp, a temp of about 30C or below is preferable, based on ambient temp of course.
The difference between the cpu and case depends on how good the hsf is.
 

Kipper

Diamond Member
Feb 18, 2000
7,366
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General pointers -

CPU Should be between 35-50 degrees celsius under load/idle.

Case/Ambient should be around 23-30 (30 degrees celsius is around 85-90 degrees farenheit, so I doubt it will be this warm)

System generally around 10-15 degrees less than the processor, I would say, but this is all relative, as the last poster mentioned, to the heatsink setup you are running.

Oh yes, and a note...ASUS boards, as far as I remember, tend to return very high temperature results.
 

Egrimm

Golden Member
Jun 26, 2001
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madcowdisease, while Asus boards report higher temps than other boards, they are'nt very high, they're just closer to the actual temp of the core. The reason they're high is that Asus just add more the the temp that the socket thermistor sensor gets than other manufacturers. So in a way you could say that Asus mobos are more accurate.
So don't mind that other people get lower temps, temps from an Asus mobo are closer to the actual temp. But until everybodyu uses the on-die temp sensor we cannot really compare temps anyway as socket thermistors are far off and are very different from board to board, even for similar boards.
 

Likuid76

Member
Dec 16, 2001
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How about the speed of the fans? chasis/power/cpu
right now, it seems as though my comp. is running properly even though my MB has reached over 61 degrees.
my prob is i just bought these two fans and they are way to loud already, anyone can recommend cheap, quite fans?
 

Egrimm

Golden Member
Jun 26, 2001
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I'm quite sure that your mobo temp / case temp isn't 61C, must be the cpu temp. What does it say the cpu temp is? For some reason I think they're switched. Anyway, 61C for the cpu is way too hot, the DO should do a better job, epsecially if it's the noisy 7000rpm version.
If you're worried about noise get a better hsf with a slower fan, a hsf with an 80mm fan would be good. I would recommend an Alpha PAL8045 heatsink with a fan with around 40cfm, or a SwiftTech MCX462, but that's more costly. For 60mm hsf's SwiftTech MCXc370 is good.
 

MistaTastyCakes

Golden Member
Oct 11, 2001
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Your problem is lying in the Orb on your CPU. I used to have one on my 1.4 and I ran around the high 50's constantly. I later picked up an Alpha 8045 and wow, the whining sound is gone and with my new case, I'm idling at around 38C, load I'm around 43C, and that's without blowholes, fancy cooling or Arctic Silver, just a stock Antec SX1000 case with the fans included.

I'd recommend ditching the Orb and using it as a fancy pen/pencil holder or paperweight and going for something nicer. There's a ton of heatsinks out there that'll cool nicely, so do some looking and find what seems to be the best for you. I guess I would recommend the Alpha 8045 since it's been so good to me so far, but you just gotta remember it's a little more pricey than most other hs's, and if you mess with processors or heatsinks often, the thing can be a pain to remove and attach again.

Asus does in fact read higher temps than a lot of other mobos, so don't worry if your temps are a little higher than the general consensus, all is fine. But...61C does seem a bit *too* high.
 

Likuid76

Member
Dec 16, 2001
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I just checked my temp for the cpu and it is running at 55 degrees... it has reached 61 degrees before.
I guess i will need to buy a new fan, i thought this was one of the better ones. *sniff* there goes more money.
Oh, my fan is a 4500 rpm dragon orb, not a 7000 rpm, but it still seems noisy =)
thnx for the advise
 

IKeelU

Member
Nov 18, 2001
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According to PC Alert III, my 1800+ (not overclocked) is running @ 55C and my case @ 34C. I am using an antec SX 630 with the single fan that came with it, and on the athlon I have the standard HSF. Strange, because I've read more than once on this forum that the AMD HSF was more than adequate for non-overcockers.:Q
 

Texun

Platinum Member
Oct 21, 2001
2,058
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IKeelU

I installed 80mm intake and exhaust fans and my temps were in the mid to upper 40's under load, but this was with the dreaded Volcano 7. I swapped the PSU for a dual fan 500W job and the temps surprisingly dropped to 41 loaded and about 36 idle with a case temp of 34C. I thought the two 80mm fans were doing a decent job of moving hot air out of the case, but after adding the PSU with dual fans I was surprised to see the difference. So surprised in fact that I checked my settings and even reinstalled my MB monitor to make sure. Even the BIOS temps agree that the extra ventilation helped. Now, if I could just get the damn thing quiet again! You may want to look at your ventilation as a way to improve the temps. Just my .02 worth.

R
 

Jman13

Senior member
Apr 9, 2001
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The spec for AthlonXP chips that are not overclocked is 67C. That's what they're intended to run at. Everyone here loves a cool chip, primarily because most people OC, and without the added cooling, you won't go very far OCing it. Ever felt the inside of a retail computer case? 95% of them run case temps around 45C. I'd imagine the processor is around 60-65C in most retail AXPs. My old Gateway P2-350 used to run amazingly hot. I had only the PSU exhaust fan...and I was running a GF2MX in there...built up a ton of heat. The PSU exhaust was astoundingly hot. However, I never had any problems due to heat in that machine...they're just built to take that kind of heat. Had I been able to OC, though..I likely would not have even made 400MHz, due to heat.

So, conclusion: the retail AXP HSF is plenty good enough if you stay at stock speed. Even in a hot, very poorly ventilated case. Everyone here, myself included, likes a cooler system, though. I am using the stock HSF on my AXP 1700+ (mildly OCed to 1800+ (1540)) and I get temps of about 27-30C case (depending on my apartment temp and whether or not my vid card has been in major use), and processor temps of 45-47C full load, 32C idle.

Jman