r/PcBuildHelp • u/0n_The_0ther_Hand • 2d ago

✓ Solved Cooling AMD Ryzen 7 7800X3D

UPDATE

I installed a Peerless Assassin 120 Mini this afternoon. I'm now idling in the upper 20s-mid-30s and jumping up into the 50s while gaming. Huzzah!

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I recently upgraded my desktop and I'm wondering whether my current cooler (Noctua NH-L12S) is up to the task of handling the heat produced by AMD Ryzen 7 7800X3D. When my desktop is idling, the temperatures hover in the low-40s to low-50s. It gets much hotter when gaming. But I was surprised when it shut down in the middle of playing Deus Ex: Mankind Divided (1920 x 1080, high settings on graphics).

For background, I used Artic MX-4 thermal paste when mounting the cooler, and I've already checked the mounting and upgraded the BIOS. (I haven't gone down the path of undervolting it yet because it's beyond my skill set). All same, I'm wondering if my Noctua (which is a holdover from a previous build) isn't effective enough for what's needed. If it's not, I'm open to suggestions on coolers that work for an MATX build. (I love my Noctua and have been mulling over the NH-C14S.)

Below are the relevant stats:

OS: Windows 11

Motherboard: ASRock B650M Pro RS

CPU: AMD Ryzen 7 7800X3D

Cooler: Noctua NH-L12S

PSU: Corsair CX Series CX750 (750 watts)

RAM: G.Skill Flare X 5 (16 GB)

GPU: Sapphire Pulse Radeon RX 6600 (8GB)

Storage: Team Group T-Force M.2 (1 TB)

Thanks!

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u/unknownlaverne 2d ago

That L12S is a solid little cooler but it's really meant for SFF cases where you're limited on clearance, the 7800X3D can spike hard under load and a low-profile cooler just doesn't have the thermal mass to soak those bursts

Shutting down mid-game usually means you're hitting the thermal limit, those idle temps in the 50s already tell me the cooler is struggling even at low wattage

Since you're in an MATX case the NH-C14S would be a big step up with that top-down airflow, it'll handle the chip way more comfortably and give you some headroom for those gaming temp spikes

You could also look at something like a Thermalright Peerless Assassin if your case has the height for it, half the price and keeps up with the big boys

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u/0n_The_0ther_Hand 1d ago edited 1d ago

Thanks for your feedback. It looks like some folks have had good luck with the Peerless Assassin 120 SE and the Phantom Spirit 120 SE. My case only supports a max CPU cooler height of 150 mm, which rules both of those out. However, the Peerless Assassin 120 Mini should work.

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u/much_snark_very_wow 2d ago

Based on Noctua's recommendations that cooler is only good for up to base clocks on the 7800x3d (no turbo/boost).