Question 7950x Prime95 temps

miha2

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Aug 14, 2009
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Hi everyone, I just finished building a new desktop, and running Prime95. When I started Prime95, it was saying Optimizing for new architecture, but I ignored it and just pressed to start the test. I have Package temps 97.1, CCD0 99.1, CCD1 96.8. Cores (max) is 95 degrees.

Is this normal? Cores max temp is fine, I know about that, but CCD0 and 1... Are those fine? First time building the AM5 desktop

These numbers are from HWMonitor
 
Solution
I'd say you're good on temps then. You're never going to see those kinds of temps in real world applications or usage except possibly for games or applications that use AVX instructions and you should be able to configure an offset to reduce AVX operational temps in most BIOS settings. You'll need to be in advanced mode in the BIOS to find such settings.
WHICH Prime95 test are you running? There are five different options available PLUS the ability to disable AVX and AVX2, also AVX512 for systems that support it. So HOW exactly are you testing and with which test?

Also, your first mistake is using HWmonitor. It's a pile of crap. Fully about 50% of the time it misreports sensors or reads the wrong sensor values. In some cases it even reports on PSU thermal readings for power supplies that don't even have the ability to report their thermal values.

I'd HIGHLY recommend you uninstall it and then go download HWinfo, and install that, and then run it making sure to select "Sensors only" and that "Summary" is disabled. HWinfo is far more accurate and is religiously updated and supported on the HWinfo forum.
 
Sorry for a late reply, didn't have connection. The default blend test or whatever its called. Like I said, core temp is "fine", 95 C, but is the CCD0 and 1 normal?

P.S. a sort of important note: some pins on the mobo were bent, and I used the needle to straighten them. I don't think it matters that much as long as the CPU is working fine... Right?
 
Ok, so your temp readings are completely wrong then. Blend is not used for thermal compliance testing. You want to use Small FFT. That is the Gold Standard for testing thermal compliance. Not "Smallest FFT". Not "Large FFT". Not "Blend".

SMALL FFT. Then, disable the option for AVX2 and then AVX after it becomes un-grayed.

Run Small FFT for 10-15 minutes keeping a close eye on temps during this time. This will give you your thermal baseline from which to make configuration or cooling adjustments. For your CPU while running the Small FFT option in Prime 95 you do not want to see any core temperatures exceed 95°C MAXIMUM. Preferably you'd like to see it not exceed 90°C during this test. It is always good to have at least a small buffer between your actual maximum thermal response and what the recommended maximum actually is. Then, if you run applications or games that you know heavily use AVX instructions, you can configure an AVX offset in the BIOS for most motherboards and then if desired you can re-test without disabling the AVX option in the Small FFT thermal test. But for determining your baseline you want AVX disabled and you want Small FFT so that you are testing using a STEADY STATE environment.

Other tests in Prime are not steady state and will offer misleading results as a result of that.

No, that is not right. MANY boards will "work" with a bent pin or two, but it absolutely is not working "right" when that is the case. If the pins are not 100% straight and making proper contact with the correct points on the CPU, and if there is ANYTHING at all which might indicate errors, erratic behavior or other problems, you can be sure it is likely a result of the bent pins on your motherboard. I mean to say the SECOND you see ANYTHING that makes you go "hmm", I'd go straight after the motherboard because it WILL almost certainly be to blame. It is extremely difficult, unless it is only just barely deviant, to straighten even one pin on a motherboard pin bed without breaking it off below the level at which you can see where it actually makes contact with the traces between layers of the motherboard, much less "some" which I assume means "several". It's possible, if you are very careful and if they were only barely bent, but any significant bending is really hard to correct, but again, depending on how badly, it's possible. Maybe you got lucky.

But I assure you, the CPU "seeming" to work fine, is not an indicator of whether or not there is still or was a problem. It matters, MUCH. There is NO scenario where it is ok for pins to be bent. Not even ONE pin. ALL pins must be exactly where they are supposed to be or you WILL encounter problems at some point, or even very often. It could be something like the memory not wanting to run at full XMP speed, or certain DIMM slots won't work, or random errors that you can't figure out, but something will happen. There is zero doubt about that.
 
So when I was inserting the CPU the first time, it was making the cracking sound. I took it out right away and saw some bent pins. I carefully straightened them with the needle, not to break them, and when I looked it with a flashlight from many different angles, all bent pins seemed to be straight. I even tried to carefully listen to any noise when inserting it the second time, not even only the cracking noise, but there was NO any noise at all. And OK, I will run the Small FFT test, not sure when I have time for that yet, though. I will also render a video in Adobe Premiere, because that may help with finding the temps, right?
 
No. Adobe premiere will not help with "finding the temps". The ONLY thing you need to test thermal compliance is Prime95 Small FFT. You can certainly run EXTRA tests if you want, but it's totally not necessary.

Besides which, Adobe premiere and any other rendering utility for video is not going to provide steady state conditions. When rendering video the loads will change and vary, which is not conducive to accurate thermal response testing. Just use Small FFT.
 
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OK, running Small FFTs, Package max 96.3, CCD0 96.6, CCD1 90.1, Cores (max) max 95.0

(Quick update: I didn't disable the AVX, and when I did, the temps were still 95, but the Package max, CCD0, and 1 were a bit lower)
 
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I'd say you're good on temps then. You're never going to see those kinds of temps in real world applications or usage except possibly for games or applications that use AVX instructions and you should be able to configure an offset to reduce AVX operational temps in most BIOS settings. You'll need to be in advanced mode in the BIOS to find such settings.
 
Solution
I'm not sure how to mark the reply as the solution on a smartphone. But thank you everyone, especially Darkbreeze. The CCD0 and 1 temps seemed to be a bit high to me, but as long as they're acceptable, that should be fine. I'll try to get to a computer and mark it as resolved when I have a chance
 
Should be fixed now. Recently they did an update to our forum software Xenforo, and you MUST be sure to choose all selections pertaining to "Question" when you create the thread in order for there to be an option for selecting a best answer. Should be able to see it now.