Quick Answer

Tune your PWM fan curve by matching the temperature source and RPM targets to the specific workload: gaming PCs need a fast ramp above 70 degrees Celsius, workstations need a sustained mid-range plateau for long renders, and creator builds need a balance between both. All three benefit from a flat, silent low-speed floor below 50 degrees Celsius.

Fan Curve Targets for Gaming PCs 🎮

Gaming PCs experience rapid load spikes when a game launches or enters a GPU-intensive scene, followed by sustained high temperatures during extended sessions. Set the idle floor (below 45 degrees Celsius) at 20 to 30 percent PWM duty cycle (roughly 400 to 650 RPM for most 120mm fans). From 60 to 70 degrees, ramp steeply to 60 to 70 percent (1,200 to 1,500 RPM) to pre-empt the sustained heat from a GPU like an RTX 5070 or RX 9070 XT generating 150W to 200W of heat into the case. At 80 degrees, allow 100 percent. The steep ramp prevents thermal throttling in 4K gaming sessions without running fans at full tilt during browsing or video playback.

Fan Curve Targets for Workstations 🖥️

Workstations running CPU-intensive renders in Blender, DaVinci Resolve, or CAD software sustain high loads for hours. A flat sustained plateau is more effective than a steep ramp. Set a mid-range RPM (50 to 65 percent duty cycle, 1,000 to 1,300 RPM) to activate at 60 degrees Celsius and hold through 75 degrees before ramping further. This avoids constant RPM hunting that workstation users find distracting. SA animators on Ryzen 9 9950X builds in open-plan offices benefit especially from the plateau approach.

Fan Curve Targets for Creator Builds 🎨

Creator builds mix workstation-style rendering with gaming-style GPU load during GPU-accelerated effects and previews in Premiere Pro or After Effects. The practical approach is a hybrid curve: a low floor below 45 degrees, a gentle ramp to 50 percent through 65 degrees, and then a sharp ramp to 80 to 90 percent above 75 degrees. This handles both sustained CPU renders and sudden GPU spikes without compromise. BIOS-level tuning in ASUS AI Suite, MSI Center, or Gigabyte SIV allows separate curves per header, enabling a different profile for CPU-adjacent case fans versus GPU exhaust fans.

TIP

Set CPU and GPU Curves Independently If Your BIOS Allows It ⚡

Modern ASUS, MSI, and Gigabyte motherboards let you assign different fan headers to different temperature sources. Set front intake fans to track CPU temperature and top exhaust fans to track a GPU temperature input if your monitoring supports it. This targeted approach prevents all fans from spinning up during CPU load when the GPU is idle, reducing unnecessary noise during office work on a creator build.

FAQ

Should I use BIOS fan curves or software like Fan Control for tuning?

BIOS curves run at all times and do not depend on an OS or software running. Software tools offer more granular control and graph visualisation but stop working if the monitoring application closes or crashes. For a reliable baseline, set the BIOS curve first; layer software control on top if you want finer tuning.

My CPU hits 90 degrees during gaming even with fans at 100 percent. Is a better fan curve the answer?

At 100 percent fan speed, the fan curve is not the limiting factor. The issue is likely cooling capacity: insufficient case airflow, a clogged CPU cooler heatsink, or degraded thermal paste. Reapply thermal paste and clean the cooler before adjusting the fan curve further.

How do I test my fan curve changes in real-time without running a full game load?

Use a CPU stress test tool (Prime95, Cinebench R24) to force sustained CPU temperatures while watching RPM readings in HWiNFO64. This safely simulates gaming or render thermal conditions within 5 to 10 minutes without launching a full game session.

Upgrading cooling for a gaming PC, workstation, or creator build? Evetech stocks 120mm and 140mm PWM fans compatible with all major SA motherboard brands, with delivery across South Africa.