If you're worried about pump-out on that i9, Id definitely go with Thermalright TFX Thermal Paste 2g. Its super thick so it doesnt migrate under heat cycles, which is a common issue with thinner pastes on high-end chips. Another pro tip is Thermal Grizzly Kryonaut Extreme 2g tho, specifically cuz it handles high TDP spikes way better than the standard version. Both are non-conductive and easy to apply...

Honestly, save your cash and just get Noctua NT-H1 3.5g Thermal Paste... you wont notice a real-world difference over the pricier stuff and it lasts forever without drying out, ngl.

Honestly, you dont need to spend a ton on fancy boutique pastes for that i9. I went with Arctic MX-6 Thermal Paste 4g for my build because its super cheap and holds up really well over time without drying out... Its basically the gold standard for value while still giving you top performance. Youll save a few bucks compared to premium brands and wont notice much difference in temps tbh.

I'm going to offer a different perspective here. In my experience, even the highest quality traditional pastes can't fully escape the pump-out effect on a 14900K over time. These chips just cycle through heat too aggressively for most liquids to stay put, and I've tried many over the years. If you want true reliability without maintenance, Honeywell PTM7950 Phase Change Thermal Pad 40x40mm is the superior choice. It performs like high-end paste but since it's a phase-change material, it won't pump out. A few reasons why I prefer it:

• It melts and fills gaps better than thick paste under heat
• It cannot dry out over time
• Zero risk of electrical shorts It's a bit more work to apply since you have to cut it to size, but thats basically a one-time thing. You won't have to pull that cramped build apart again for a long time. TL;DR: Skip the liquid pastes and use a phase-change pad. It handles those TDP spikes while providing much better long-term stability than standard paste.

Just saw this thread and if you want something that rivals the high-end pads without being a pad, you gotta look at Gelid Solutions GC-Extreme 3.5g Thermal Grease! I love it because it really beats out the cheaper stuff for raw thermal transfer during those crazy 14900K spikes. Its amazing how stable it keeps things! Tho if you want the absolute top tier, Kingpin Cooling KPx High Performance Thermal Compound 3g is fantastic and super easy to spread compared to those super thick pastes. Both are way better for your chip than the older versions people usually recommend. Let me know if you need help with the application process or anything, I've done it a million times! Actually, building in cramped cases is such a nightmare lol. Reminds me of when I tried to cram a custom loop into an ITX build last summer. I spent three hours just trying to route one tube behind the PSU and ended up scratching my knuckle so bad there was blood on the motherboard... had to clean it off with 99% isopropyl before I could even boot. My cat was just watching me struggle from the desk, probably judging my life choices. Anyway, both those pastes will definitely handle that heat without pumping out too fast, but yeah.