AMD Ryzen7 9800x3d Overheating

[dasylisa]

My Ryzen 7 9800X3D is hitting high temps under gaming and content work wondering whether it’s a cooler choice, TIM, or BIOS settings. If you run this CPU, what cooler, pump/flow, case airflow, and BIOS offsets made the biggest difference? Share temps, workload, and any undervolt/curve tips that actually helped.

 

[jameswill8520]

Yeah this is normalish for the 9800X3D: it’s an 8 core AM5 chip with a 120W TDP and it can push much higher power under real loads, so temps look higher than older Ryzen parts. If you want practicality: a quality 360 mm AIO (or a very big tower air like a Noctua DH-series / Corsair A115 class) + good TIM + proper mounting usually moves you the most. Aim for idle 40–50°C and gaming mid-50s to mid-70s depending on ambient and game; full all-core content workloads will be higher.

 

[AnnP111966]

Reseat the cooler with fresh high quality TIM (NT H1/NT H2 or Thermal Grizzly), check pump header RPM and set pump to 100% for testing, confirm radiator fans are intake/exhaust in a sane push/pull, and monitor with HWInfo/CPUID HWMonitor. If you still thermal-throttle then consider curve optimizer undervolt (small negative steps per core).

 

[ethanwalker]

Not trying to be dramatic, but I replaced my stock cooler with a CR360 (EK Nucleus/any quality 360) and my gaming temps dropped 10 –15°C in CPU bound titles. Before that I was hitting mid-70s in long sessions; now sitting low-60s. Also run a -20 to -30 on Curve Optimizer (per-core, test stability) undervolt helped more than fiddling with PBO for me. Worth the AIO if you game a lot.

 

[captainghost]

Liquid shills gonna liquid-shill. You absolutely can run this on air big money Noctua or the new Corsair A115 tower will hold the line if your case airflow is excellent. You don’t need to shove a 360 in every build; sometimes a good dual-140 tower + 2 intake/1 exhaust case setup keeps gaming temps comfortable and louder but thermals acceptable. Don’t forget: a 9800X3D will still draw significant power under load; keep expectations realistic.

 

[AnnisHayma]

Practical checklist you can copy/paste into your troubleshooting do each step and report back:

1. Monitor: Run HWInfo64 and log temps/power during idle, gaming, and Cinebench/R15 for a baseline.
2. Cooling check: Confirm cooler mount evenness (no bent bracket), fresh TIM, radiator fans oriented for good airflow.
3. Pump & fans: Ensure pump is on a pump header (100% for testing) and fans on CPU_FAN/CHA headers (set to full curve).
4. BIOS: Update BIOS first. Try a conservative Curve Optimizer -10 to -25 (test stability with Cinebench + a long gaming session). If you use PBO, try setting PPT/TDC/EDC caps lower or temporarily disable PBO to see temp change.
5. Case airflow: Two intakes front/bottom, one exhaust top/rear is the baseline. If your GPU is pushing lots of heat, add more intake.
6. If temps still high: consider larger AIO (360/420) or re-evaluate case (some slim cases kill rad performance).

Small note: undervolting usually reduces temps and improves sustained boost behavior on X3D chips do it gradual.