Author Topic: CPU Temp (Read 358 times)

JimBear · « **on:** April 18, 2003, 02:37:40 PM »

First off, AMD Guys go over to the corner and do your snickering there.

I was running a Intel P4-1.8 (478) and the temperatures reported on the chip averaged 30-45C (45C after a long intense session). Just popped in a 2.4 proc and this thing is hitting 55C in no time while game playing.

Anyone know if this is normal, or should I be concerned?

TIA

bloom25 · « **Reply #1 on:** April 18, 2003, 03:13:04 PM »

That's too high IMO (though not to dangerous levels). Your CPU is probably clock throttling itself as a result and limiting your performance.

You might want to pick up a better heatsink/fan.

qts · « **Reply #2 on:** April 18, 2003, 03:32:42 PM »

I disagree. Go look at Intel's specs. 55C is fine.

Chairboy · « **Reply #3 on:** April 18, 2003, 03:41:11 PM »

You may wish to lap your heatsink.

To test how good the contact between your heatsink and CPU is, take a pencil and make a cross-hatch pattern on the bottom of the heatsink, then rub it back and forth across a piece of paper for a minute and look to see if the pencil marks came off evenly or only around the edges.

I had a temperature problem with my computer and did this. I found that there was no pencil marks rubbed away in the center which meant that there wasn't good contact between the heatsink and CPU. I lapped the heatsink using these instructions:

http://www.broadbandreports.com/faq/5417

My CPU temperature went down 15 degrees celsius!

bloom25 · « **Reply #4 on:** April 18, 2003, 08:14:19 PM »

As I said, 55C is not at dangerous levels, but I still think that is too warm for that CPU.

The last 2.53 GHz ('B') P4 I built (with retail cooler) ran at 39C under full load.

My own Athlon 2400+ (2 GHz) overclocked to 2.2 GHz runs 41C full load.

Just because a CPU can run at up to 85C without damage (the case with most modern CPUs) does not mean that it should. Also, P4 CPUs will reduce their clock frequency if they get to around 60C. It's quite possible that Jimbear's P4 is running that warm under maximum load.

Jimbear, did you put a fresh layer of thermal interface compound between the CPU and heatsink when you changed that CPU?

bloom25 · « **Reply #5 on:** April 18, 2003, 08:38:00 PM »

Ok, I took down my Intel developer's guide off the wall (yes, I do have one... though the ARM manual has received a lot more attention these days) and looked up power consumption specs for all possible P4 2.4 GHz models:

Model: Cache: (typ, max) Voltage: Typical power consumption: Max temp:

P4-2.4G (512KB L2)
1.475V
1.75V
50.7A
59.8W
71° C

P4-2.4G
(512KB L2)
1.5V
1.75V
49.8A
57.8W
70° C

P4-2.4G
(512KB L2)
1.525V
1.75V
50.7A
59.8W
71° C

P4-2.4B
(512KB L2)
1.475V
1.75V
50.7A
59.8W
71° C

P4-2.4B
(512KB L2)
1.5V
1.75V
49.8A
57.8W
70° C

P4-2.4B
(512KB L2)
1.525V
1.75V
50.7A
59.8W
71° C

As you can see, the maximum temperature that P4 could possibly withstand is 71C. If Jimbear's CPU is hitting 55C in "no time at all" it is probably running too hot and could be clock throttling.

JimBear · « **Reply #6 on:** April 19, 2003, 10:50:24 AM »

Thanks for all the info
Bloom, I think the thermal grease could be the culprit. or poor application of it. Bought some new arctic silver and will be applying it according to their destrructions. Hopefully back up in a bit with better temps.

Turns out I had glopped on to much paste last time, cleaned and reapplied and it is sitting at 42C under load, mucho bettero

Thanks again for all the tips, next weekends project will be relapping the heat sink

fffreeze220 · « **Reply #7 on:** April 20, 2003, 10:35:08 AM »

U better go and by an Athlon