A GPU running too hot throttles itself to avoid permanent damage - that means lower FPS, stuttering, and in extreme cases, system shutdowns. In South Africa's warm climate, particularly during summer months, proper GPU thermal management is even more important. Here's how to diagnose and fix GPU overheating.

Quick Answer

How do I fix a GPU that's overheating? Clean the GPU fans and heatsink, improve case airflow, check that thermal paste hasn't dried out, and adjust fan curves in MSI Afterburner to be more aggressive at lower temperatures. Most overheating issues are resolved by cleaning and improving airflow.

🔧 Diagnosing GPU Overheating

Before fixing anything, confirm that overheating is actually the problem. Use MSI Afterburner or GPU-Z to monitor:

  • GPU Temperature - concerning above 85°C under gaming load, critical above 95°C
  • GPU Hotspot Temperature - should be no more than 20°C above GPU core temp. If hotspot hits 110°C+, there's a thermal interface issue
  • Fan Speed % - if fans aren't spinning up to 80%+ at high temps, your fan curve is too passive
  • GPU Clock Speed - sudden drops mid-game indicate thermal throttling

SA-specific note: ambient room temperature significantly affects GPU temps. A GPU running at 80°C in a 20°C room will push 88°C+ in a room at 30°C. Ensure your gaming space is reasonably cool during summer.

📊 Step-by-Step Fixes

Step 1: Clean the GPU Dust buildup on heatsink fins and fan blades is the most common cause of overheating. Remove the GPU from the case, use compressed air to blow out dust, and clean fan blades with a soft brush. Do this every 6–12 months.

Step 2: Set an Aggressive Fan Curve In MSI Afterburner, open the fan curve editor and set fans to ramp to 70% at 70°C and 100% at 85°C. Many stock fan curves are too conservative and prioritise quietness over cooling.

Step 3: Improve Case Airflow Ensure your case has positive airflow: more intake fans (front/bottom) than exhaust fans (rear/top). Check that intake fans are not blocked by dust filters and that cables aren't obstructing airflow paths inside the case.

Step 4: Repaste the GPU If your GPU is more than 3–4 years old and temperatures are still high after cleaning and fan curve adjustment, the thermal paste between the GPU die and heatsink may have dried out. Repasting with a quality thermal compound (Thermal Grizzly Kryonaut or Arctic MX-6) can drop temperatures by 10–20°C.

Step 5: Undervolt the GPU Undervolting reduces power consumption and heat output without significantly affecting gaming performance. Use MSI Afterburner's voltage/frequency curve editor to find a stable lower voltage at your target clock speed.

❓ Frequently Asked Questions

What temperature is too hot for a GPU? Above 85°C under sustained gaming load is worth investigating. Above 95°C is a problem that requires immediate attention. Most modern GPUs thermal throttle between 83–90°C depending on the model.

Can I repaste my GPU myself without voiding the warranty? Opening a GPU to repaste it typically voids the manufacturer warranty. If your GPU is still under warranty and overheating, contact Evetech support first to explore warranty repair options.

Does undervolting a GPU damage it? No. Undervolting reduces voltage and heat, which is gentler on the hardware than running at stock or overclocked voltages. It's a safe and widely recommended practice.

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