Bazzite 43
Original framework 16 with and without rx7700S
240W charger
Doing any heavy work seems to make the fans go straight into full speed and I’ve found that it’s specifically the APU going straight into 100. Pretty sure I am already well past warranty at this point so it’s either figure out what is wrong with my motherboard or move on to a different laptop.
You probably haven’t replaced the liquid metal with PTM yet.
oh! I say the messages about that but I thought it was only a minor improvement not an overheating issue.
looking at the installation, nobody mentions what size of PTM7950 to buy though and the dimensions don’t seem to be listed anywhere
FW16 AMD 7840HS, no dGPU. Just APU.
Mine settles at 83.8 C in performance mode, with amdgpu_top showing 45W.
I had an older mainboard, with PTM (I replaced the LM), that would sit at 100 C, but it was replaced with a more recent one that sits at 83.8 C. The PTM made the temp range between cores improve. I.e. with LM the range was 20 C +, with PTM is was 10C range or less. But it still got Tctl 100 C with the PTM.
So, there might be something else at play to cause 100 C.
With the replaced mainboard, I suspect the (2) and (3), but I have no way to test.
As the PTM made the core temp range less (10 C or less), I think the PTM was working. But maybe the heat sink itself was faulty also.
So, I am just saying that PTM might fix the problem, but there are other causes.
In summary, it is possible to get a mainboard that does not hit 100 C.
Running with:
stress-ng --cpu 0
After a few minutes it is steady at:
sensors output:
cros_ec-isa-0000
Adapter: ISA adapter
fan1: 3343 RPM
fan2: 3101 RPM
ambient_f75303@4d: +48.9°C
charger_f75303@4d: +50.9°C
apu_f75303@4d: +58.9°C
cpu@4c: +83.8°C
gpu_amb_f75303@4d: -0.1°C
gpu_vr_f75303@4d: -0.1°C
gpu_vram_f75303@4d: -0.1°C
gpu_amdr23m@40: -0.1°C
Technically, if I really try, I can get Tctl up to 100 C if I really try. But in normal operation, it stays below 90 C.
This thread shows where the heatsink solder can sometimes be bad:
The whole uneven-cpu-thermals thread is a really good read, if you have the time.
Sadly I already ordered some a few weeks ago for a different project. so I need to cut it into shape. So an mm dimensions would be great but it’s all codes
I also bought the PTM from somewhere else, I measured the CPU size and cut the PTM after the removal of heat sink
Update since the PTM will take some time to arrive. I replaced the liquid metal with some old cooler master gel I had around and immediately see a much better performance on load down to 70 celsius.
The only problem now is I am still getting display failure after a few minutes of sustained load. Not entirely sure what is causing it now. If anyone can point me in what I should check out next that would be great.
Visually inspect the mainboard very carefully, there might be some tiny bits of residue liquid metal lingering somewhere and causing failures when melt under load. It could also be the display cable, reconnect it if that’s the case