i'm tending to agree with you...i don't think that's the whole answer to it.... the heatsink over the cpu 2 chipset is also hotter.
i don't think that's the whole answer... because:Pretty much all dual socket systems the second CPU will run warmer due to being further inside the case, further from the air intake etc.
Yeah, i kinda wonder why for a long time but haven't gotten a good answer. didn't know if this is also the same with epyc, and xeon gold platinium...i'm tending to agree with you...
i don't think that's the whole answer... because:
1) on HP Z820 systems where they have air ducts to keep the "air channel" for each CPU separated, i've seen the same thing.
2) on my daughter's computer with Supermicro X9DAi motherboard, which is installed in a full tower gaming case, I configured the CPU coolers to blow up, instead of out the back; exactly to avoid blowing hot air from CPU1 to CPU2. The top of the case has several large fans exhausting the hot air out the top. And yet, same issue... one CPU is always hotter...
not a gaming rig... just a gaming tower case. it's got 2x E5-2670v2 and 1080TI in it too... but it's more of a machine for her to learn. I've got VMs setup for various OSes for her to experience, though the host/base OS is Fedora Linux. I'm teaching her to program on it too... once she gets fluent in some languages, I'll teach her about algorithms and performance optimization, which is where I think that machine will shine. Although, I have wondered if there's any value in her experiencing working on a large C project that takes days to compile... LOL.yr daughter got a dual cpu game rig? lol... lucky for her..... isn't that a little too many cores for a game rig?
I've seen this phenomenon on rack mount systems where the CPUs are side by side.Pretty much all dual socket systems the second CPU will run warmer due to being further inside the case, further from the air intake etc.
That all depends on how the OS schedules the work; it may be that I/O-intensive processes (which spend much of their time waiting) get scheduled on the CPU with the I/O, while CPU-intensive processes get scheduled on the other CPU.That’s what I am trying to say, logic says if any cpu is hotter it would be the 1st one as all the PCI lanes used to drive on board network and storage etc would be on that one.
as was stated, even when the fans are not facing in serial, it still shows cpu 2 hotter consistently.Why do we have to devise a test? Nobody knows what kind of workload you run when you observe this behavior on your systems. Or which kind of add-in cards you use in which slot.
On all the dual-socket systems I have at hand, CPU2 runs hotter than CPU1 if it sits in the hot exhaust air of CPU1. Same for idle and CPU-intensive applications. This remains my #1 hypothesis.