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EyeOfTheLiger

HWMonitor Temps

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Posted · Original PosterOP

Lately whenever I open up HWMonitor it shows a higher temperature at first (ex:44c) then quickly drops to a lower temp (ex: 30c) in the span of like 3 seconds and stays stable there.  If I close and re-open it, it still shows the low temp, but if I open it like 10-15 mins later it shows a higher temp at first then quickly drops in the span of like 3 seconds again to the lower temp and stays stable.  (just mostly idle browsing the internet, nothing that uses the cpu much in between).  Is that normal for HWMonitor and I just never really paid attn to it before?

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It's most likely caused by the CPU spiking in usage as it loads the program off the SSD/HDD. When you close and reopen it immediately, the program hasn't left the RAM yet, so the CPU doesn't need to do much work to reload it. And when you wait awhile, the program has left memory, so the CPU has to drag files of the storage drive again, which temporarily spikes the CPU usage. Most other temperature monitoring programs do similar things.


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1 minute ago, EyeOfTheLiger said:

Oh, is that also why task manager shows high cpu usage right when you open it but instantly drops down?

Yep. Whenever the CPU loads things off the RAM, the RAM is physically closer (so less travel time for electrons) and the RAM is faster, so the CPU hardly has to do anything for the program to open. 

When the CPU loads a program that isn't in the RAM, it has to contact the disk, which then has to locate the files, then read them, and wait for the files to move to the memory. It requires more CPU cycles to retrieve data off a disk than to retrieve straight from memory.


Primary PC: - https://pcpartpicker.com/list/8G3tXv (Windows 10 Home)

HTPC: - https://pcpartpicker.com/list/KdBb4n (Windows 10 Home)
Server: Dell Precision T7500 - Dual Xeon X5660's, 44GB ECC DDR3, Dell Nvidia GTX 645 (Windows Server 2019 Standard)      

*SLI Rig* - i7-920, MSI-X58 Platinum SLI, 12GB DDR3, Dual EVGA GTX 260 Core 216 in SLI - https://pcpartpicker.com/list/GHw6vW (Windows 7 Pro)

HP DC7900 - Core 2 Duo E8400, 4GB DDR2, Nvidia GeForce 8600 GT (Windows Vista)

Compaq Presario 5000 - Pentium 4 1.7Ghz, 1.7GB SDR, PowerColor Radeon 9600 Pro (Windows XP x86 Pro)
Compaq Presario 8772 - Pentium MMX 200Mhz, 48MB PC66, 6GB Quantum HDD, "8GB" HP SATA SSD adapted to IDE (Windows 98 SE)

Asus M32AD - Intel i3-4170, 8GB DDR3, 250GB Seagate 2.5" HDD (converting to SSD soon), EVGA GeForce GTS 250, OEM 350W PSU (Windows 10 Core)

*Haswell Tower* https://pcpartpicker.com/list/3vw6vW (Windows 10 Home)

*ITX Box* - https://pcpartpicker.com/list/r36s6R (Windows 10 Education)

Dell Dimension XPS B800 - Pentium 3 800Mhz, RDRAM

In progress projects:

*Skylake Tower* - Pentium G4400, Asus H110

*Trash Can* - AMD A4-6300

*GPU Test Bench*

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