Okay, thanks 
You mentioned, you also used a PTM for the dGPU, which I would really like. Do you think one 40x40mm PTM could be cut in a way to be used for the CPU shim and the dGPU? (I need 2x 20x20 for the CPU, which would leave 40x20mm for the dGPU, right?)
I have no clue about the die size on the dGPU…
Probably applying the PTM to the dGPU is as straightforward as it gets: Remove thermal paste, clean with alcohol, apply PTM, reassemble?
I don’t recall the exact dimensions, but the LTT pad I ordered was definitely enough to do both CPU and GPU.
Regarding the dGPU repaste: be careful. I ended up destroying some of my misc. component thermal pads. Thankfully, I had already been planning to replace them with putty, but I didn’t plan on destroying them by accident.
@PSierra117 I think I figured it out, I had to also change the “system” setting and disable STAPM (which I didn’t want anyways), but I’m now able to sustain 50W+ instead of being locked to 45W. I also got my highest cinebench score of 15.6k! Granted, that was just a single run rather than a 10min burn. I’d still be interested in seeing a pic of your settings if you wouldn’t mind.
You can disable STAPM and safely operate under load? By safely, I more so mean not experience incredible throttling due to high temps creating performance stability issues. I suppose it is more likely when you do the heatsink mod and have more average consistency in temps, but I’d be pretty concerned about doing it personally. I’ve got the 370 and from what I understand, don’t need to do the mod as some folks have stated they slightly redesigned the heatsink from the 7040 series, assuming that statement is accurate.
Not sure what any downsides yet would be, but if I encounter any I’ll be sure to report. So far, seems to just work for me.
I was able to tweak my settings and it looks like i can now get a sustained ~62W, limited by thermals! This doesn’t seem to translate into much of a gain on cinebench… but it’s fun none the less
Yeah thats what i told roundabout 60W is doable. But as you figured, not worth the extra heat.
just curious if anyone has attempted any modification for thermal optimization for the FW Ai 9 HX370 board? I am under the impression that any thermal issues were addressed with the updated design so any further modification perhaps would not yield much gain?
Oh, I should indeed try to avoid that, thank you!
Does this tool allow you to disable hyperthreading? Or have some voltage offset controls?
I’ve heard that (at least for desktop CPUs) HT does nothing for most games, and for some, it actually makes performance worse if the game wasn’t programmed to handle it correctly.
So I’m contemplating testing with HT disabled to see if I can squeeze some more performance out, or at least push the clocks a little higher without the temps going too
Then again, I could be completely wrong and HT is necessary for the AMD 7840 to even function. But if I can set a TDP limit, that’d be cool too.
Disabling HT is a Relic. Yes possibly its increasing fps in some games, but its in the niche margin you dont need to hassle with and the GPU is throttling before that. Even if you play old ganes, its not neccessary.
I never thought about disabling ht so i have no clue if its possible with smokeless umaf
@theNobleOpti You don’t need smokeless to disable hyperthreading, I have a script I’ve used in the past to disable cores on my FW16 (e.g. for testing if it’s more battery efficient to disable unneeded cores [it’s not]). If I can remember, I’ll share that script tonight. Based on the Steam Deck plugin Power Tools, you can disable hyperthreading by disabling all odd-numbered CPU cores.
That said, I’ve tested disabling hyperthreading on many games with my steam deck as I seek to squeeze out every possible frame from the device. I’m not sure I’ve found a single game that benefited from it.
What did you use for the misc. components? Just a generic thermal pad? Or thermal paste?
I used Thermal Grizzly’s thermal putty. Paste would be too thin and not make a good connection, and I didn’t want to worry about getting the right pad thicknesses.
Not sure about hyperthreading but from what I’ve heard in the discord, attempts to set voltage offsets on the 7840hs with smokeless resulted in someone hard bricking their motherboard.. could be user error but pretty risky in general.
As far as I’m aware the 7840hs does not support voltage offsets, only the ryzen 9 series does. I was under the impression that the bios settings wouldn’t show up if they weren’t valid though.
Yes, forgot to mention it does not support voltage offsets, the guy who tried smokeless knew this but I suppose wanted to fully check.
I did the copper shim mod today and can report, that my CPU now sits at ~90°C while under full load instead of ~100°C
I dont have any benchmarks, but it seems like it did help quite a bit!
Hmmmmmm I ran a benchmark thing…and while it’s was doing its thing cpu was 100%ish and yeah temp went to 100c for the duration.
sooo this fix is pretty much mode intensive thing to do on these machines yeah.
Wish there was a way to check if the LM was actually doing what it should or not 
ok maybe I need to read through all the threads and see how people know it’s an issue or not
Easy if your CPU Total Power is below 45w while beeing at 100C on Full Load your LM is Toast. You should be below 100C when sitting at 54w and at max 90C when at 45w all under full load.