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Phenom II 720 temperature?

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April 23, 2009 11:53:28 PM

I have the Phenom II 720 BE overclocked to 3.2 ghz


I have the XIGMATEK HDT-S963 92mm Rifle CPU Cooler

and this is what the temps are idle from CPUID


CPUTIN: 39C

Core #0: 25C
Core #1: 25C
Core #2: 25C


and Speedan says this

CPU: 39C

Core: 25C

Is this normal? I have the stock thermal paste that came with my heatsinkfan


and do I go by the individual CPU temps or the main one, and why are the individual temps different from the main one?

More about : phenom 720 temperature

a b à CPUs
April 24, 2009 4:19:39 AM

I don't see why they wouldn't be normal. Usual ok ranges for CPU temps are 40-60C right?
April 24, 2009 5:12:45 AM

I read most people are getting 23C with this heatsink fan, so my question is....

is my temperature 25C because that's what all 3 cores read? or is my temperautre 39C because that's what the CPUTIN reads? and speedfan reads CPU 39C and core 25C

So what do I go by?

by the way, I had my case fans set up wrong, now I am getting 36C cpu and 23C individual core.
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a b à CPUs
April 24, 2009 6:22:17 AM

I'm assuming your temperature is what CPUTIN and Speedfan list under "CPU". The whole core thing may just cover the actual cores themselves, while "CPU" covers the whole processor.
a b à CPUs
April 24, 2009 7:14:22 AM

CPU temp=ambient temperature. Thats the temp that the processor says is in the area of the processor. I think of it as the temp of the heatsink, I believe it is measured from a sensor touching the heat spreader of the cpu.

Core temp= core temp. Its the temp that the procesor is reporting for each core, there's a sensor for each core, again this is my understanding.

A high ambient temp would make me suspect the case cooling needs to be looked at. 25C for an idle temp is just dandy and prolly aboout what temp for the room you are in. Most coolers are incapable of cooling below room temperature. 23C=73F.

An ambient temp of 39 is a bit high, I wouldn't try to OC higher until investigating the case cooling.
April 24, 2009 12:50:54 PM

I bought the Phenom II 720 BE, and I wanted to test the stock HSF first to see if it will be able to handle my needs. The only modifications I did was apply Arctic Cooling MX-2 instead of the stock thermal compound, and install another 80mm fan on top of the heatsink's fan.

I am currently idling @ 31 C and the cores idle @ 19C. When I overclock to 3.2 and game, I get a max of 41 C for the CPU and a max of 32 C for the cores. After an 8-hour torture test with Prime95, the highest temp reached was 49 C.

What do you guys think? With a little bit of creativity, you can save on an aftermarket HSF, and use the cash somewhere else.
April 24, 2009 1:21:49 PM

my idle is now 36C, and underload it only reaches 39C, but prime 95 makes to go to like 45C
April 24, 2009 2:11:42 PM

Same here for prime 95. But that's the worst case scenario.

Anyone running with 4 cores?
April 24, 2009 5:01:05 PM

xsever said:
Anyone running with 4 cores?


Yep. 3.32, 29 idle, 48 under load.

April 24, 2009 8:53:50 PM

Same temps MISRy. What OS are you using and which HSF?
April 24, 2009 10:32:08 PM

XP64 and a OCZ HDT tower with a 92mm fan.

Yes, yes I know... I'm holding out for Win7. ;/
April 25, 2009 12:07:38 AM

I am triple booting XP32, XP64, and Win7 64. Holding pretty well.

When I unlock the 4th core in Win7 and restart, the computer does not even POST. I have to clear the CMOS. I am going to try it with XP32, and 64.

Anything else you would like to add regarding this?
a b à CPUs
April 28, 2009 3:39:56 AM

What do you mean clear the CMOS? You have the reset everything? What's happening there?
April 28, 2009 4:01:09 AM

i was oc to 3.2 and average temp was 22c under-load 32 with stock cooler using artic silver 5
April 28, 2009 11:39:14 AM

r_manic said:
What do you mean clear the CMOS? You have the reset everything? What's happening there?


It means his 4th core isn't unlocking under Win7. If you don't have to do that now and then while overclocking you aren't pushing the envelope very hard.

xserver, I run @ 1.4v for the 4th to be stable.
April 28, 2009 1:45:04 PM

Thanks MISRy. I am assuming you are doing all your tweaks from the BIOS, and not AMD overdrive right?

I have the gigabyte GA-MA790GP-UD4H with the first original BIOS (F1). I cannot access the advanced options in the BIOS by hitting Ctrl + F1. I would like to enable ACC from there. Anyone has any experience with that Mobo?
April 28, 2009 2:49:48 PM

Most definitely BIOS. Sorry can't help on the ACC.
April 28, 2009 5:33:03 PM

I figured it out. You have to get into the normal BIOS first, and then hit Ctrl + F1. Up and running now with 4 cores. They are stable with prime 95 and stock voltage. Why did u go to 1.4V ? Did you see instabilities?
a b à CPUs
April 29, 2009 1:48:59 AM

again, this noob asks: why wouldn't the fourth core of the CPU be enabled by default? To save power? Keep temps down?
April 29, 2009 2:33:58 AM

No, usually the 4th core is disabled because it is faulty.

However, alot of the 4th cores are perfectly fine.
April 30, 2009 10:28:07 PM

r_manic said:
again, this noob asks: why wouldn't the fourth core of the CPU be enabled by default? To save power? Keep temps down?


Because the chip we are discussing, the Phenom II 720 BE is sold as a 3 core unit. The fact that some of the early units are able to have the 4th core activated by changing a setting from 0 to 1, (figuratively), is neater than peanut butter as far as I'm concerned.

xsever, yes, at lower volts the entire chip becomes unstable with the 4th core active. I'm assuming that was why the 4th core was turned off. At 1.4v though I can run OCCT and SuperPi all I want, 4 cores 4 threads and get a peak of 48c. With 4th core off I can run at 3.7G using 1.325v and can boot to 3.9 @ 1.4.
May 3, 2009 3:13:31 AM

The problem I faced is that I unlocked the 4th core, and it was stable, but if I shutdown the computer, and tried turning it back on, the computer won't even POST. I had to reset the CMOS for the computer to boot.

Do you think that I should raise the voltage to 1.4 in order to get the computer to coldly boot with the 4th core enabled?

Please let me know as you expertise with the 4th core seem to be pretty high.

Thanks,
May 4, 2009 11:05:57 PM

Sorry it took so long to get back. It's worth a shot. You can go to 1.425v and stay in the envelope.
July 6, 2009 7:19:24 PM

hi guys. my temperature for my 720 at idle is 24C but under load is 60C + . i dont think this is normal.. is it possible the sensor is faulty?

im using the heatsink that came with my athlon x2 6000. it has a copper base with heatpipes. it works better than the stock one. the heatsink is firmly attached with thermal paste..

maybe the motherboard msi k9a2 cf-f is messed up ?
the heatsink is not burning to the touch

any ideas? should i worry?

Thanks
Juanjo
August 1, 2009 2:10:44 PM

I'm running at 3.5ghz, max 40C for the core with Prime 95 running.

OCZ vendetta 2, Antec 900 case
Anonymous
a b à CPUs
October 21, 2009 11:48:56 PM

xsever said:
The problem I faced is that I unlocked the 4th core, and it was stable, but if I shutdown the computer, and tried turning it back on, the computer won't even POST. I had to reset the CMOS for the computer to boot.

Do you think that I should raise the voltage to 1.4 in order to get the computer to coldly boot with the 4th core enabled?

Please let me know as you expertise with the 4th core seem to be pretty high.

Thanks,


Hi, I have the same problem after i unlock the 4th core, when i get into bios and try to tweak a little, after i save the setting normally it will restart the whole dos, right? but mine , it just black out and nothing happening, and i need to switch off my PC and turn it back on to boot in dos....is this normal?

another problem is, I can't see my temp in any of program on vista? speedfan show o'c, amd's drive also show zero degree... none of the core is showing the correct temperature.. how can i fix this?
now, i switch 4th core off and just OC the tricore to 3.6GHz... well idle on 43c. is it good enough? I am using xigmatec cooler~ cheers~!
October 27, 2009 1:48:51 PM

Exactly what I experienced... I too would like to know how to fix the temperature monitoring problem as well as bios booting problem...
November 1, 2009 8:50:54 AM

I have just installed this chip and the fan that came with it. Bios reads the temp at 51C is there an issue with the heatsink or should I just buy a new cooler or case fan??
November 1, 2009 7:10:37 PM

Calklein said:
I have just installed this chip and the fan that came with it. Bios reads the temp at 51C is there an issue with the heatsink or should I just buy a new cooler or case fan??

not normal.... my idle CPU temp is 33C, and core temp is 10C lower. Check your core temp, CPU temp, MB temp, then you will have an idea what's wrong
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