GPU Overheating Fix: Thermal Pads & Paste Guide for Hong Kong
Introduction
Graphics card running hot? Getting sudden shutdowns or performance drops while gaming or rendering? You're likely dealing with GPU overheating. In my 15 years of repairing computers in Hong Kong, I've seen countless GPUs brought in with these exact symptoms. The fix is often simpler than you think: replacing dried-out thermal paste and pads. This guide walks you through the process, what to watch out for, and when to call a pro.
Why do GPUs overheat in Hong Kong's climate?
Hong Kong's high humidity and year-round warmth accelerate the degradation of thermal interface materials. Thermal paste dries out faster, and thermal pads harden and lose their elasticity. Based on our repair data at ComputerKing, over 70% of GPUs brought in for overheating issues are over two years old and have never had their thermal paste replaced. The constant cycle of heating up during gaming and cooling down at night creates micro-cracks in the paste, reducing its ability to transfer heat.
What are the signs of GPU overheating?
Your GPU will tell you when it's struggling. Look for these symptoms:
- Thermal throttling: Your frame rates drop suddenly during intensive tasks, as the GPU lowers its clock speed to protect itself.
- Loud fan noise: Fans spin at maximum speed constantly, trying to cool the card.
- Random crashes or black screens: Especially during games or rendering.
- Artifacting: Strange visual glitches, lines, or flickering on screen.
- High idle temperatures: If your GPU sits at 60°C or above when doing nothing, something's wrong.
In my experience, thermal throttling is the most common complaint we hear. I've seen cards running at 85-90°C under load, which is far too high for modern GPUs.
How to choose the right thermal paste for your GPU?
| Paste Type | Thermal Conductivity | Longevity | Best For |
|---|---|---|---|
| Standard silicone-based | 4-6 W/mK | 1-2 years | Budget builds, older cards |
| Carbon-based | 6-8 W/mK | 2-3 years | Mid-range gaming GPUs |
| Ceramic-based | 7-9 W/mK | 3-4 years | High-end cards, less risk of electrical conductivity |
| Liquid metal | 70-80 W/mK | Permanent | Extreme overclocking, but risky (conductive) |
For Hong Kong's climate, I recommend ceramic-based paste with a thermal conductivity of at least 8 W/mK. It offers excellent performance and lasts longer in humid conditions. Avoid liquid metal unless you're experienced—it's electrically conductive and can short circuit your card if applied incorrectly. At ComputerKing, we use high-quality PTM7950 phase-change thermal pads for many modern GPUs, as they perform well under sustained loads and resist pump-out.
Are thermal pads necessary for GPU repair?
Yes, absolutely. While thermal paste handles the GPU die (the main chip), thermal pads transfer heat from the VRAM (video memory) and VRM (voltage regulator modules) to the heatsink. If these pads are dried out or too thin, your VRAM can overheat, causing crashes and artifacts. Many people only replace the paste and ignore the pads, which is a mistake. I've seen RTX 3080 cards where the VRAM reached 110°C because the pads had turned to dust.
What size thermal pads do I need for my GPU?
This varies by GPU model. Common thicknesses are 1.0mm, 1.5mm, 2.0mm, and 2.5mm. You need to measure the gap between the components and the heatsink. A caliper is the best tool for this. Alternatively, check online forums for your specific card model—many enthusiasts share exact pad dimensions. A good quality pad has a thermal conductivity of 6-12 W/mK. For Hong Kong's heat, I suggest 12 W/mK pads for VRAM.
Step-by-step: How to replace GPU thermal paste and pads
- Prepare your workspace: Work on a clean, anti-static surface. Gather tools: screwdrivers, isopropyl alcohol (90%+), lint-free cloths, thermal paste, thermal pads, and a plastic spudger.
- Remove the GPU from your PC: Unplug power cables, press the PCIe latch, and gently remove the card.
- Disassemble the cooler: Remove all screws on the backplate. Note their positions—some are different lengths. Gently separate the cooler from the PCB. The thermal paste may be sticky, so twist slightly.
- Clean the old paste and pads: Use isopropyl alcohol and a cloth to clean the GPU die and heatsink. Remove all old thermal pads from VRAM and VRM. Use tweezers for stubborn residue.
- Apply new thermal pads: Cut pads to match the size of each VRAM module and VRM. Peel one side, place it on the component, then peel the other side. Ensure good contact.
- Apply new thermal paste: Place a pea-sized dot (or an X shape) on the center of the GPU die. Do not spread it—the heatsink will do that when you tighten it.
- Reassemble: Put the cooler back on, tighten screws in a cross pattern (like a car wheel) to ensure even pressure. Reinstall the GPU and test.
What about fake GPUs? How to spot them?
Recently, we've seen a surge in fake GPUs, especially high-end models like the RTX 4090. These scams are prevalent on online marketplaces like Carousell or Facebook Marketplace. I've personally examined four RTX 4090 cards brought to our shop, and three were fake. How to spot them:
- Weight: A real RTX 4090 is heavy (over 2 kg with cooler). Fakes feel light.
- Die size: Real GPUs have a large die. Fakes often use an older, smaller chip.
- BIOS and drivers: Fake cards may show incorrect device IDs or fail to install proper drivers.
- Performance: Real 4090s crush benchmarks. Fakes perform like a GTX 1060.
If a deal seems too good to be true, it probably is. Always buy from reputable sellers. If you're unsure, bring the card to ComputerKing for a quick inspection.
Can you fix a GPU by baking it in the oven?
You might have heard about the "oven trick"—placing a dead GPU in a kitchen oven to reflow solder joints. I strongly advise against it. While some claim temporary success, baking can damage capacitors, warp the PCB, and release toxic fumes. In Hong Kong, where kitchens are already small and humid, it's a fire hazard. We've seen cards that were baked and then brought to us—they were beyond repair. Proper reflow requires controlled temperature and flux, which only professional equipment can provide.
When should you replace vs repair your GPU?
If your GPU is more than 5 years old and has major issues (like artifacts or no display), replacement is often more cost-effective. Repair costs for high-end cards (RTX 3080 and above) can be worth it, as a new card costs thousands of HKD. For example, replacing thermal paste and pads on an RTX 3080 costs around HK$400-600 at ComputerKing, while a new card is HK$5,000+. For older cards like a GTX 1060, buying a used replacement for HK$600 might make more sense.
How to maintain your GPU for longevity in Hong Kong?
- Clean your PC regularly: Dust buildup insulates heat. Use compressed air every 3 months.
- Monitor temperatures: Use software like HWMonitor or MSI Afterburner. Keep GPU under 85°C under load.
- Replace thermal paste every 2-3 years: In Hong Kong, I recommend every 2 years due to humidity.
- Ensure good case airflow: A well-ventilated case with intake and exhaust fans makes a big difference.
- Avoid overclocking in summer: Higher ambient temps mean less headroom.
Frequently Asked Questions
Q: Can I use regular thermal paste meant for CPUs on my GPU?
A: Yes, you can. CPU thermal paste works fine for GPUs. Just ensure it's non-conductive to avoid short circuits.
Q: How often should I replace GPU thermal paste in Hong Kong?
A: Every 2-3 years. The humid climate accelerates drying. If you see high temps or throttling, do it sooner.
Q: Will replacing thermal pads void my warranty?
A: In most cases, yes. Check your manufacturer's policy. Some brands like EVGA allowed it, but others seal the cooler with warranty stickers.
Q: My GPU is still under warranty. Should I repair it myself?
A: No. If under warranty, contact the manufacturer or your retailer. Self-repair can void the warranty.
Q: Is it worth repairing a water-damaged GPU?
A: Possibly, but it depends on the extent. We've successfully repaired many water-damaged cards by cleaning with isopropyl alcohol and replacing corroded components. Bring it in for a free assessment.
Conclusion
GPU overheating is a common issue in Hong Kong, but it's often fixable with a simple thermal paste and pad replacement. Don't fall for the oven trick or fake GPU scams. If you're not comfortable doing it yourself, bring your card to ComputerKing. We've handled over 10,000 repair cases and can diagnose and fix your GPU quickly. For a free checkup or to book a repair, WhatsApp us at +852 2186 8010 or visit our shop in Mong Kok.
*This article was written by the ComputerKing senior repair team, with over 15 years of computer repair experience in Hong Kong and 10,000+ cases handled. Last updated: 2026-07-29*