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Is my unlocked CPU safe?

1143 Views 13 Replies 5 Participants Last post by  Zeifer, 
K
I unlocked the 4th core of my phenom ii x3 720p. As expected, I can no longer monitor my core temperature using Core Temp so that I have to rely on the TMPIN0/1/2 values reported by CPUID HM. I don't know which one is which temperature but I guess the one shows the highest temperature (TMPIN1) is CPU temperature and the one shows the lowest temperature (TMPIN0) is the case temperature and the other (TMPIN2) is north bridge temperature. Am I right? Before I unlocked the 4th core, I found that TMPIN1 is always 10~12 C higher than reported core temperature (surprise because I thought the temperature measured by motherboard sensor should be lower than measured directly by CPU sensor). After unlocking the 4th core, my idle CPU temperature (TMPIN1) is about 42C and when running Prime95 it's about 72C. So based on my formula, I guess my core temperature is ~32C idle and ~62C at 100% load. Is this estimate valid? Should I consider upgrade my heatsink (I'm currently using the stock heatsink and fan)? Many thanks.
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Zeifer
Please fill out your sig rig in the user control panel so we know what we're looking at.

72C is WAY too high for that chip.

Your temps are:

TMPIN0 = Motherboard
TMPIN1 = Northbridge
TMPIN2 = CPU

You need to go by TMPIN2 when it comes to max temperatures. When you unlock a core it disables the individual core temperatures.

That estimate doesn't make any sense, the CPU temp is detected by the motherboard, so whatever temperature it's getting is actually lower than the processor temperature by 1-2C. That chip should be nowhere near 72C.

Check your voltages, set the CPU vcore to like 1.4v or 1.35v if it's higher than that. Something's wrong.
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Strat79
72c could very well be very close to the real core temps man. My 550BE goes from 50c full load as an X2 to 64c full load as an X4(stock voltages and quite low ambient temp, 20c). The stock cooler doesn't do too good with all 4 cores unlocked, at least not the stock 550BE cooler. 720 may be a different one.
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Zeifer
Quote:


Originally Posted by Strat79
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72c could very well be very close to the real core temps man. My 550BE goes from 50c full load as an X2 to 64c full load as an X4(stock voltages). The stock cooler doesn't do too good with all 4 cores unlocked, at least not the stock 550BE cooler. 720 may be a different one.

What I meant when I said it shouldn't be close is that that processor should not be running that hot, and he needs to not stress it until he gets a new cooler or locks it back to a triple core.

The stock HSFs are garbage.
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Chilly
A stock headsink won't do justice for a Quad Core CPU, I think it's pretty clear that you get a good aftermarket heatsink, even if you don't use your CPU at full load.
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Strat79
2
Quote:


Originally Posted by Zeifer
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What I meant when I said it shouldn't be close is that that processor should not be running that hot, and he needs to not stress it until he gets a new cooler or locks it back to a triple core.

The stock HSFs are garbage.

Aye, I was responding to the OP. Had not even read your post yet


Those temps are way too high, even if the motherboard sensor is reading a few degrees higher than the actual core temps. I would go back to 3 cores and re-run your temp tests again and make sure you are reading the right TMPIN's in comparsion to the actual core temp readings. They should be fairly close to each other. My MB CPU sensor is TMPIN2 or under ACPI as THRM, if that helps.
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K
Hi guys, thank you all for the help. I updated my system information and hope you can all see it. The TMPIN0, TMPIN1 and TMPIN2 values after unlocking the 4th core and while stress testing using Prime95 are 43C, 72C, 58C, respectively. I thought the middle one (TMPIN1) was the CPU temperature. But according to you guys it should be TMPIN2. Where exactly I can find the information about which is which temperature? I heard it varies from motherboard to motherboard.
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K
By the way my Vcore is 1.325V. I'm not overclocking yet so everything is the stock setting.
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H-man
If you can, undervolt.
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Strat79
I'd say TMP1 is your CPU for that motherboard then(Pretty sure it does vary from MB to MB). The only other thing that could be going that high is the NB, and only if you have the NB voltage turned way up for some reason. May be worth looking at in the BIOS to make sure it's not set higher than it should be, but I'd say it's just the crappy stock HSF not up to snuff for an X4.

One final and very very important question. What is the ambient temps in the computer room?
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K
My room temperature is ~23C. Now I locked the 4th core again and while running Prime95 the core temperature is 54C and TMPIN0, TMPIN1 and TMPIN2 are 42C, 64C and 56C, respectively. The closest to core temperature is TMPIN2. But I don't understand why at idle my core temperature is 34C and TMPIN0, TMPIN1 and TMPIN2 are 24C, 41C, 41C, respectively. None of them is close to the core temperature.
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Zeifer
The actual CPU temperature is what's more important when it comes to maximum temperatures, not the cores themselves.
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K
Hmm, still not sure which one is cpu temperature. But I think I'll keep it as 3 core until I get my Xigmatek S-1283.
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Zeifer
Try stressing it for a minute or two, and watch the temperatures. The northbridge is likely to jump up by 5C increments or so to reach it's max temp, while the CPU will crawl up much slower. That should help determine the temps.

However, as a fellow Gigabyte owner, I'm guessing your TMPIN2 is the CPU.
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