CPU possibly fried 6

[BenyG]

This thread refers to the problem that I mentioned towards the end of tihs thread: thread602-665831 Reading it is not required to be able to understand/help with this thread but I've included the link for completeness.

Before anyone decides to flame me I think it is a good idea to make a new thread as my problem has changed somewhat.

I have a AMD 750 Duron system.

I had a cooling problem with my CPU and vacumed clear all the dust between the fan and heatsink etc. as advised.

Before when at load the CPU temp rose to 69C before freezing. This was after 20 mins of running at full load.

However now after cleaning everything out the CPU rises to only 60C before freezing! The cleaning has helped as the fan now runs at 4115 instead of 3750 with all the dirt in it. But I cannot think why the system freezes after ~3 mins of full load now instead of ~20 mins when all the dirt was in there. Here is some data of the temp rise when at full load after the fan being cleared out.

Time Temp/C Time Temp/C
0 52 0 52
00:00:10 57 00:00:12 56
00:00:35 58 00:00:20 57
00:01:10 59 00:01:20 59
00:03:52 60 00:02:36 freeze
00:04:29 freeze

When checking the raised part of the CPU it was still sticky to the touch so I cannot see how that can be the problem.

Is 60C (70C inside) still to high for the CPU?

Why would the CPU now be less 'tolerant' to higher temps now that I've cleaned its fan out?

Is it possible that the decrased tolerance is a symptom of the CPU getting fried? The problem started in September but I have been careful with te CPU since October.

Thanks for any help,

Ben

 

[ski]

Clean off all of the old thermal paste from the CPU and its heatsink with a credit card and then with high purity alcohol(91% pure or higher), apply Arctic Silver 3 or higher, and see if that helps.

If not, then the CPU may have been damaged.

 

[paparazi]

I don't know where you are in the world but for a Duron 750 to be touching these high temps you must have very high ambient (surrounding room) temperatures? or very inefficient heatsink/fan and case cooling.
I am guessing that you are running the original "small" heatsink/fan unit that came with the new system build.
Basically any cheap $5 heatsink/fan unit today (which are far bigger and come with a more powerful fan) will give you drastically improved cooling compared to what you presently have.
Or remove, clean and refit you excisting fan, reapplying a small amount of paste to the raised core of the CPU only and fit one 80mm case fan below your power supply, exhausting warm air from the case.
Even in a warmish climate a Duron 750 shouldn't really be getting any higher that the low 50's C MAX.
Get the temp down first before coming to any conclusions about it being faulty.
Martin


Replying helps further our knowledge, without comment leaves us wondering.

 

[SESaskDFC]

Howdy:

from the amd web site:

Although "normal" operating temperatures are not specified for AMD processors, there are maximum operating temperature ratings that must not be exceeded. The maximum operating temperature of a processor may be determined by the processor's Ordering Part Number (OPN). Refer to the processor's data sheet for additional information (data sheets may be downloaded from the Technical Documents page).
Typically, the maximum operating temperatures for Socket A AMD Athlon™ and AMD Duron™ desktop processors are 90 degrees Celsius for processors operating up to 1GHz, and 95 degrees Celsius for processors operating above 1GHz.

You are well within limits here but, I would take ski's advice..

Murray

 

[BenyG]

I've looked around online and cannot find any high-purity alcohol for sale, do you know of any substitutes or anything else I could clean it with eg vodka?

Thanks,

Ben

 

[SYAR2003]

A pharmacist might have
isopropanyl/isopropanol
destilled petroleum


Or there is designated products like:

http://www.modsynergy.com/Review 3.htm

 

[TheGoatMan]

Ok nevermind the thermal grease or alcohol. First make sure your heatsink is clamped down very tight on your cpu. I mean it better be very difficult to get off. Second check your v.core. If its to high your chip will heat up very quickly. Also the material your heatsink makes a difference. You'll want an aluminum heatsink with a copper core. I recomend a thermaltake volcano 7. Try that out.

 

[BenyG]

paparazi,

I live in England - only a temperate climate here! It rains far too much! Its Winter here atm

Thanks for your help, I built my system myself in Jan 2002 so I am unsure whether its "small" or not. The heatsink height is ~50mm (about the same as the width of the CPU socket, its like a cube.) Would you suggest that it needs upgrading from these specs?


SYAR2003,

Thanks for the link.


Ben

 

[SYAR2003]

Deacent air circulation in the cabinet is also
a must .
Don't help even with a termaltake volcano 10000
if you don't have intake fan end exhaust fans .
Cpu won't be cool with warm air blowing on it.

 

[BenyG]

An update: The crashes seem to result in the powering down of the monitor so that it reads "cable disconnected." Could this mean a different error or just a weird effect of the CPU heating on the gfx card?? Its only started reporting this error recently rather than just a frozen screen.

Thanks for any help,

Ben

 

[SYAR2003]

Well if your cpu is 60C in IDLE i guess your graphics card
is pretty hot to .
Try having taking off the cover/side doors of the PC
to get more fresh air into the cabinet and see if it improves anything.

 

[TheGoatMan]

You aren't running an ASUS board are you?

 

[SYAR2003]

Here we go again...

 

[TheGoatMan]

Just kidding that wouldn't be it. Although I still hate their boards. Looks like its just me.

 

[SYAR2003]

Hehe..
I hear UK is pretty rainy/foggy
maybe the PC is suffering from humidity inside it.

 

[blasted]

When i cleaned the base of my heatsink recently i scraped of the old paste with a stanly blade, then gave it a clean. If when you are applying new paste dont use to much, too much will act in reverse and insulate rather that conduct. One thing i did find useful was buying little squares of compound to put on the heatsink, they come at the right thickness and dont make a mess. they were a damn site cheaper at 80 pence for six.

 

[ski]

Never use a metal object/tool to scrape thermal paste from a heatsink(or a CPU die).
It can scratch the surface, which will greatly reduce the heat transfer efficiency.

 

[SYAR2003]

The bottom of a heatsink shuold look like a mirror .
If it's scratched it greatly reduses it's effect. Then it has to be lapped to get it good again.
As for the arctic silver something like the size of half
of a grain of rise is sufficiant. Covering the cpu in a
thickness of a paper.

 

[Freestone]

I know some of you have seen this link posted by me in another thread, but I think it bears repeating:

AMD has some good video clips regarding processor and heat sink installation, and views regarding thermal paste vs. thermal pads. Worth a view in my opinion. Sorry for the multi-line link, but the carat symbol is not handled well by this site.

http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_3734_4348^6678,00.html

 

[Freestone]

Take Two:

[URL unfurl="true"]http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_3734_4348^6678,00.html[/URL]