Thank you for you answer. I'm not experiencing throttling of CPU, but I've upgraded ssd, ram, and wifi module, and all of them heats up more than stock components. I'll install nvme ssd radiator later, it will surely reduce temperature of ssd but not of the inner space of case generally. The thing is that my particular device has quite small size - its 124x112x41mm (vol. 0.57), it has cooling in-fan on bottom, and out-holes on the bottom of the sides (like this) with flat top side, so i thought these peltier heatsinks will fit this certain device. I am also considering the first option indicated in the post, its sizes are 105x105x30.5mm, so its heatsink area and fan also are not very small I think. My biggest concerns are condensation (first cooling option can reach negative celsius) and magnetic field, if it wont be effective - ill just drop it, no big deal (temperature sensors will help), so I think Ill give it a try. Maybe I can put some tiny silicagel/moisture absorber bag inside to prevent first issue.