05/03/2026 8:35 am
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So ive been building rigs for like ten years now and usually i just slap some mx-4 on and call it a day but this new i9 14900k is a totally different beast. im running a 360mm AIO and the idle temps are fine but as soon as i start rendering these 4k files for a wedding video im editing for a client next friday the thing just spikes straight to 100c and starts throttling like crazy. ive reseated the block twice now and even tried some old noctua stuff i had lying around but nothing is keeping it under 95c under load. i even checked the mounting pressure and its solid so i think i just need something with way higher thermal conductivity than the basic stuff i usually use. budget isnt really an issue i just need this stable before i lose my mind and miss my deadline lol. i heard some people talking about kryonaut or the kingpin stuff but i dont want to go liquid metal if i can avoid it since i move my tower around a lot. honestly just looking for the absolute best non-conductive paste that can actually handle these insane intel spikes. what are you guys actually seeing the best results with for these high tdp chips specifically?
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05/03/2026 9:00 am
> the thing just spikes straight to 100c and starts throttling like crazy To add to the point above: honestly, i had similar issues with the 14th gen chips and its super frustrating. Unfortunately, those thinner pastes like the old stuff we used to use just cant handle the thermal expansion cycles on these high-power i9s. They end up suffering from the pump-out effect where the constant heat literally pushes the paste out from the center of the die over time. Not as good as expected for professional work, tbh. If you want reliability without the risk of liquid metal, i usually stick to thicker, high-viscosity options. Thermal Grizzly Kryonaut Extreme 2g is basically the top tier here because it doesnt dry out as fast under those insane load spikes. Another solid choice if you want something safer that lasts a long time is Noctua NT-H2 3.5g Thermal Paste. It has better stability than the original H1 and wont degrade as quickly when you are rendering for hours on end. Just make sure your mounting pressure is totally even... you got this!
12
05/03/2026 9:20 am
Saw this earlier but just getting around to this now. Unfortunately, even the best grease usually fails on these i9s after a few weeks of heavy use because of the pump-out effect. To add to the point above: i had issues with high-end pastes being not as good as expected because the lga1700 socket actually bends the cpu ihs. It's super frustrating and definitely feels like a design flaw. I was pretty let down until i tried the Thermalright LGA1700-BCF Anti-Bending Contact Frame which finally leveled things out so the cooler actually touched the chip properly. If you want a real solution for those 4k renders, look into Honeywell PTM7950 Phase Change Thermal Pad. Its basically a solid sheet that turns into a liquid when hot. It fills the gaps better than paste and wont degrade when the chip hits 100c. It costs more than a tube of mx4 but honestly its the only thing that kept my rig from throttling.
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05/03/2026 8:36 am
Honestly, the basic stuff was a huge letdown for me. I had issues with cheaper pastes drying out way too fast under that heat, which was really disappointing. Since im also too nervous to try liquid metal, these worked much better for my rig:
- Thermalright TF8 2g 13.8 W/mK Thermal Paste
- Kingpin Cooling KPx 3g High Performance Good luck with that deadline, those i9 spikes are just scary...
