Author Topic: P4 2.8 C temp seems pretty high... (Read 1261 times)

osage · « **on:** June 29, 2003, 12:12:11 PM »

I just got a P4 2.8C, Abit IC7-G 800 FSB system in a Lian-Li 6089A case and I am a little concerned at the temperatures the CPU is hitting when it is cranking at 100%.

It's hitting 72 degrees C, and the system temp is around 40.

Is this anything I should worry about?

I had to notch up the Windbond System Doctor monitoring software 3 degrees from a default high CPU temperature of 70.

I've also got a radeon 9700 in there, 2 HDs, a CD burner, an Audigy 2, and a DVD player.

Will the chip automatically throttle back if it gets too hot?

How hot is too hot?

214thCavalier · « **Reply #1 on:** June 29, 2003, 01:11:33 PM »

The IC7G is reporting high cpu temps. The cpu will throttle back on its own if needed but it will have to get a lot hotter than that to require it.

http://forum.abit-usa.com/showthread.php?s=&threadid=11496

Also be sure to get the latest bios update it allows you to set the cpu warning temp higher than the original.

osage · « **Reply #2 on:** June 29, 2003, 02:09:12 PM »

Thanks much Cav!

JustJim · « **Reply #3 on:** June 29, 2003, 10:05:44 PM »

Wow 72 C is 161.6 F seems quite high I dont think I'd let mine run that hot.

then again Pentiums dont seem to be effected by heat as much as AMD's, but still thats a tad high IMHO.

mars01 · « **Reply #4 on:** June 30, 2003, 01:07:42 AM »

I built a 2.53 a while back - thought it was alarming to see 40 - 50 C so I called Intel. They said my temps were normal and that they started seeing problems in the 70 to 80 degree C ranges. But if it runs ok it may be ok. I would watch it on hot days though. What are the RPMs on your case fans and on CPU fan?

214thCavalier · « **Reply #5 on:** June 30, 2003, 04:21:26 AM »

He does not have a problem, as i stated already the IC7 and IC7G are reporting high cpu temps. Or should i say higher than people are used to seeing.

Abit are aware of it, dunno if they gonna do much about it tho.

Quote

Is the CPU temperature too high? Why is the CPU temperature of my ABIT motherboard higher than some other motherboard with the same chipset? (ABIT P4 mainboards)

The way CPU temperature measured in the BIOS or in the hardware monitor is through an I/O chip on the motherboard. That I/O chip probes a voltage given by the CPU thermal diode, and then BIOS / hardware monitor reads this value and uses some mathematical way to calculate the approximate temperature. According to Intel, there is another temperature sensing diode, which is responsible for the CPU overheating protection. When the CPU junction temperature reaches approximately 135 degrees Celsius (275 degrees F), the processor will turn down itself. That is, we can say the CPU is quite safe if it is less then 135 degrees Celsius (275 degrees F).

Since the temperature is “calculated”, not “measured”, the formula which the BIOS uses will make the outcome different. There is a parameter that is provided by the I/O chip vender, which we expect it to be the standard, so we use this parameter to calculate the temperature of the processor. Once this parameter in the BIOS is changed, the temperature shown in the BIOS PC health or in the hardware monitor tool will be altered. But, in the mean time, the actual temperature of the CPU is still the same. So the temperature you saw might be higher comparing to other motherboard with the same chipset, it is because we use the different parameter to calculate the temperature. We cannot say that we are more accurate, but we sure follow the standard provided by the I/O chip vender, and we believe it should be the proper one.

Based on the test in our lab with following conditions, the average CPU temperature in idle state is below 50 degrees C (122 degrees F); meanwhile; it is below 75 degrees C (167 degrees F) while heavy loading. The CPU temperature is affected by room temperature, chassis temperature, CPU fan and other heat source inside the chassis. If the reading is higher than our data, please consider doing some improvement for heat dissipation.

Room temperature: 25 degrees C (77 degrees F)
Chassis temperature: 35 degrees C (90 degrees F)
A good chassis with two 12 CM system fans; one draws air into the chassis and the other exhausts hot air outside the chassis.
A strong CPU fan
The "CPU Shutdown Temperature" in "PC Health Status" page could be enabled and set to 90 degrees C (194 degrees F). In case there are something wrong with the system like CPU fan stops or drops off from CPU retention unit, the ACPI compatible operation system could shut down itself to prevent the system crash and other damages. But, if the operation system fails to shut down, there still be a final insurance that CPU will turn itself down at 135 degrees C (275 degrees F) and the system will be powered off immediately.

mipoikel · « **Reply #6 on:** June 30, 2003, 08:59:55 AM »

Try this:

Thermalright SLK-900-U

+

PAPST 8412NGML (19db)
or
PAPST 8412NGL (very quiet, only 12 db)

osage · « **Reply #7 on:** June 30, 2003, 09:46:02 AM »

I'm convinced I don't have a problem; Abit is just using a different formula to calculate the chip temp.

And the chip won't even start to throttle back until the temp is almost twice as high as the highest temps I've seen.

I'm really pleased with my new setup so far, AH is running like glass at 2nd highest resolution even in heavy smoke (min frame rates in the high 30s, max around 150).

Ripping CDs and encoding mp3s is a trivial matter now.

My Hitachi CM715 19" monitor is the main FR bottleneck now, it just can't support decent refresh rates at the highest resolution.

But it's great to finally have an almost cutting edge system after all these years of overclocking Celerons (what a great chip that was!)

And Wi-Fi rocks! I set up an ad-hoc peer-to-peer 80211.b network with my laptop to share the cable internet connection and it is simply amazing--reliable, no latency and no issues whatsoever.

LoneStarBuckeye · « **Reply #8 on:** July 01, 2003, 11:36:43 AM »

Osage:

I've got a similar setup, including the same MB and case, except that I've got the 3.06/800 version of the P4. I use an Alpha heatsink and have Vantec Tornado fans on the heatsink and the two case outlets. I replaced the case's two front fans with beefier 80x25mm fans. I use a fan speed controller, and when I crank up all four channels (driving five fans), it sounds like I'm running four hairdryers. If I run the CPU fan at about 4000 rpm and the case fans at 3000 rpm, the sound isn't too bad. Using those fan settings and running the memory bus at 215 MHz (CPU at about 3.2 GHz), I see the following temperatures CPU temperatures under idle and full load, respectively: 42.5/52.0. Using the stock fans and Intel CPU heatsink and fan, the temperatures were about 7-9 degrees higher. My system is completely stable now, and was with the stock setup. I only changed to experiment a bit with overclocking.

I don't know what to make of the IC7-G temperature sensing situation, but it seems that the P4 will run just fine well above the temperatures that you are reporting.

- JNOV

osage · « **Reply #9 on:** July 03, 2003, 11:32:34 PM »

How did the overclocking experiments go?

I would do it if I had a reason (AH is pretty much the only game I play).

Would you overclock using the stock CPU and case fans?

LoneStarBuckeye · « **Reply #10 on:** July 04, 2003, 03:14:15 PM »

The jury's still out on the overclocking. I'm trying to do it without pushing up the voltage, so I'm having only limited success.

If AH is the only game you play, I'd say there is no reason to overclock. I play at 1600x1200x32/4xAA/4xIAF and my framerates never deviate (at least not that I've seen; I only check periodically) from 85 fps, my monitor's refresh rate.

But, yes, I think you can overclock with the stock fans. Just take it slow. In any case, if you don't play with the voltages, you're not likely to break anything. There are plenty of antecdotes on the Web about people using stock cooling and having great success OC'ing the 2.4 and 2.8 GHz Pentium 4's. A lot of it just has to do with the particular piece of silicon you have.