Why is my 3200+ so warm?

EricStevenHolt

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Aug 17, 2004
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Hello everyone. This is my first post (I think) the the Toms forums. I tried to post this earlier, and I thought I did...but I cant seem to find it, so I must have not posted it. Anyway, heres my problem:

I built a machine to be used as a server for a buddy of mine. The specs of this machine are:
Case: Antec PerformancePlus 1080AMG
Mobo: Gigabyte GA-7N400 Pro2
CPU:: AMD Athlon XP 3200+ (Barton, 400mhz FSB)
HSF:: Gigabyte Cooler-PRO (PCU21-VG)
VID:: Gigabyte card with 128mb GForce Chip

I started out using the heatsink/fan that came with the CPU, but my temperatures were way too warm... around 65C for the CPU. So, I put the case away for a little while and ordered some extra case fans and a new HSF...the one I mentioned above, and some Artic Silver 5 thermal grease.

The case now has 5 case fans in it, two in the bottom-front blowing in, two in the top-rear (just below the PSU) blowing out, and one on the side panel blowing in.

Right now, my system temperature is 31C, and my CPU temperature in 61C. The current ambient temperature in the room the machine is in is about 25C. When the room cools down, the case temperature will cool down a little bit, and the CPU temperature follows... they stay pretty much 30C apart. The lowest I've seen the combo is 25C and 55C. BTW all of these temperatures are IDLE. The machine is running linux, its going to be used as a LTSP server hosting a bunch of thin clients...and I havnt gotten the sensors module to work correctly to read the temps under load, yet.

Now, I'm starting to get close to my time limit on returning the CPU (30 days) back to NewEgg... so if I need to do that I need to do so by the end of the week. I'd rather not, though... but these temperatures concern me. Since the machine is going to be used pretty hard, at the times its accessed, I'm afraid at load I'll be maxing it out too much and taking years off the CPUs life.

Please help! Thanks,
........................Eric Holt
 

Johanthegnarler

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First things first. Check the internet to make sure there isn't a known problem for the motherboard temp sensor to be off. Lately that has been a biggy, and then you will need to update the bios if needed.

Another could be poor ventilation in the case, wires hanging or anything that may be in the way of the airflow.
Sometimes more fans isn't always the best thing. They might be creating a stale spot over the cpu. Try turning certain fans off in different combinations to see if that helps at all.

*one of the first things i'd do is try turning the side fan off that's over the cpu. In my case it screws with the airflow too much and for some reason makes it around 8c hotter than if i just have the front sucking in and the back blowing out.

Then the last thing i would check before getting flustered would be to remove the hsf and clean/re-apply AS and make sure it's fitted properly.

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The GA-7n400Pro2 (I've personally had three) has some wierd temperature quirks. First which BIOS are you using? And which version, becuase there are two 7n400Pro2s one has F-(a number) and Rev2 which is F-(a letter)

The non Rev2 7n400Pro2 had a temperature reading problem that was corrected in a BIOS update, but in general this increased the temps, as they were reporting to low.

I recently picked up the Rev2 board and have noticed it reads my CPU temps considerably lower. Therefore I do not fully trust the temp readings on these boards.

I have the same exact cooler as you, same board, on a 2800+ XP Chip, my machine still runs warm, but still stays below 60° C even at 100% load.

<b>What RPM are you running your fan at? Are you sure you properly applied thermal grease?</b>

At this point I don't think you got a bad chip, the 2800-3200 do run pretty warm.

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EricStevenHolt

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Aug 17, 2004
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Hey guys, thanks to the both of you for your ideas. Lemme answer a few questions for ya. I have a rev2 version of this board, with the FF bios. I saw there is a newer one on Gigabytes site, but it doesnt say anything about temperature issues. I'm going to install it, however, when I get a floppy drive picke up for this machine, later this week.

My CPU fan is running at 4000 RPM, full speed. Noise isnt an issue to me, since this is a server and is gonna be locked away in a separate area with noone having to be right around it. (It IS a noisey machine, now!) The PSU fan is only running at 1100rpm, but thats what the specs say it should run at, so I guess I shouldnt be too concerned. The backside out of the case is quite warm, but inside the case around the PSU is *not* warm at all.

So, first thing I tried was turning off the side fan, to see if that made any difference... the only difference it made was that over an hour, my case temp rose 2 degrees, so I plugged it back in.

After that, I did a little bit of research, and did find a thread on a board with some people owning this same board saying they thought their CPUs were misreporting too high on the temperatures. SO maybe thats the case.

Next I wanted to see what sort of temp the CPU got up to at full 100% utilization...so I spent all afternoon getting "lbsensors" working under Linux so I can read the temps. THIS is where it gets interesting.

lbsensors is reporting three temperatures back to me. Motherboard (thermistor sensors) at 29C, CPU (thermistor) at 26C and "temp3" (diode) at 53C.

My guess is that the 53C "temp3" reading is actually my CPU, and that lbsensors is just confused...but I could be wrong. Where is it getting that third reading from?! I have NO idea whatsoever.

Anyway, even at 100% CPU utilization for like 7 minutes (compiling a new linux kernel), the hottest the "temp3" reading got was 60C, and dropped very quickly back to 53C when it went to 0% utilization. The one that is labeled "CPU", however, went up to about 35C, and then went back down to 26C. The one reporting as "Motherboard" only went up like 2 or 3 degrees C.

SO, thats where I'm at now. Still fairly confused. Actually, probably more confused now than I was just reading the temps in BIOS.

Any more suggestions at this point, guys???

Thanks much!!!
--Eric Holt
 

P4Man

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I think the answer is still the same; either you messed up the HSF installation, or your motherboard misreads the temps (regardless wether the results are shown in BIOS or Linux). There is just no way a A64 3200+ would run that hot with a properly installed cooler and normal vcore (maybe check that, you're not feeding it 2v or anything ?).

Did you try putting a finger on the heatsink ? Does it feel warm at all ?

= The views stated herein are my personal views, and not necessarily the views of my wife. =
 

EricStevenHolt

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P4man: Thanks for the reply. This is an XP 3200+, btw, not a A64, though I doubt that matters much to your suggestions.

I did just check my voltages, and they all seem very right...but I'm curious as to why lmsensors is reporting a VCore1 and a VCore2 number. Can/are there really two? My 1 is 1.69, and 2 is 2.67. The 1.69 one is, from what I've read, correct... I honestly have no idea about the 2. BIOS reports that Vcore and all voltage readings are Okay.

I'm going to take the HSF off tomorrow, clean it up, reapply my ArcticSilver5 and see if that changes anything, but my guess is going to be No...since I've gone from the original HSF with the pad, to the original HSF with some Ceramique, to this new HSF with AS5. But it wont hurt to try, for sure.
 

P4Man

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> This is an XP 3200+, btw, not a A64, though I doubt that
>matters much to your suggestions.

It sure does matter ! Sorry, I misread, I assumed you had an A64.. world of difference. XP3200+'s run considerably hotter, and therefore your temps could be right.

Applying AS5 will give you better results as the pad, but don't expect more than a couple of degrees.

Anyway, for a barton, those temps are rather high, but not out of the ordinary. Try running some very cpu intensive apps, see if its stable. maybe even disconnect a case fan, and see if it remains stable even then. If so, relax, reconnect the case fan, and let the temps be what they are

= The views stated herein are my personal views, and not necessarily the views of my wife. =
 

endyen

Splendid
At 1.69, you chip is being overvolted by .04. This may not sound like much, but it is all heat. Try to lower your voltages, as much as possible, while staying stable of course.
 
I didn't notice any temperatures differences when I updated the BIOS on my Rev2 board. 3200+ do run really warm, but 61° should normally be a 100% load temp. You heatsink has that little tab on it that goes between the socket and the CPU, are you sure that is seated properly? None of the heat pipes look damaged on your heat sink do they? No twisted, or cracked ones? I'd try an reapply the AS5 one more time, try and spread it over the core before putting the heatsink on, rather than just a dap in the center.

I kind of get the feeling that these Gigabyte boards read a little warm. I had an Abit KV7 (I think KV7) with the same chip and heatsink, and it reported much lower temperatures, in the same case, so either the Abit or Gigabyte wasn't reporting temperatures properly.

With that board, heatsink, and CPU, you should be able to get down around 50°-53° at idle.

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addiarmadar

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Please make sure to ONLY PUT A SMALL DAB of AS5 on the die. Also lap the bottom of the HSF with a litter AS5 and wipe the rest off with a lint-free cloth.

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pat

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How many HDD you got inside? They generate tons of heat too. Having a lot of fan doesnt mean good airflow. Maybe you could improve wiring around the CPU. Download aida32 (google it). It will give you better sensor reading. You could update BIOS too. And, as someone suggested, touch the heatsink with your finger. Normal body temps is 37 celcius. you wont get burnt at 50-55 celcius, but that will be hot. If your skin start to melt, it is definitively too hot :)


-Always put the blame on you first, then on the hardware !!!
 

EricStevenHolt

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Everyone, I want to thank you ALL so much for your suggestions. Tonight, I finally had the time to take off the HSF and clean it up and reapply the AS5. When they say apply a VERY TINY amount of AS5, they really mean it, dont they?

In BIOS, my case is now at 28C, and my CPU is at 47C. A drop of *10* degrees C. For the 3200+, is 47C closer to what it really should be running at?

In linux, with no load, lmsensors is now reporting 29C/25C for the System, and 46C for the CPU.

When compiling the kernel, under 100% cpu utilization for 5 full minutes, the system hit 29C/27C and the CPU got up to 49C, and no more. Within 1 minute it was back down to 46C.

Do these temps sound like they are more in line with where they should be? They seem like it to me. I'm happy now, I can live with these. I really appreciate everyones feedback and suggestions working through this!

Thanks,
Eric Holt
 

endyen

Splendid
Much better. Can you loop a kernel for an hour or so? The temps should stablize after 15 minutes, to show peak, and if it can handle it no problem, for an hour, you should be good to go. Normally you want temps below 55 for a server, but sensors on mobos have been off a lot lately.
 
In BIOS, my case is now at 28C, and my CPU is at 47C. A drop of *10* degrees C. For the 3200+, is 47C closer to what it really should be running at?
That pretty much exactly what you should be running at. With your heat sink you will pretty much find that you will have a maximum temperature. With my 2800+ chip, overclocked to 2500 mhz, running at 100% load for 2.5 hours it never went above 59° C

Endyen has a good point, try and run some benchmarks are something to run your CPU at full load and check to make sure your temps stay under control.

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