GPU Repair in Hong Kong: Thermal Pads & Paste Guide for 2026
Introduction
Graphics card running hot? Don't panic. In my 15+ years repairing GPUs in Hong Kong, overheating is the number one issue I see—and most of the time, it's a simple fix. A GPU that's hitting 90°C under load isn't just noisy; it's throttling performance and shortening its lifespan. The good news? Replacing thermal pads and paste can drop temperatures by 10–20°C. Here's everything you need to know, from identifying the problem to doing the repair yourself—or knowing when to call in the pros.
Why do GPUs overheat so often in Hong Kong?
Hong Kong's subtropical climate is a silent killer for graphics cards. With average humidity hitting 80% year-round, thermal paste degrades faster than in drier regions. I've seen cards just 2 years old with paste that's turned to chalk. Add to that the fact that many Hong Kong apartments lack proper ventilation, and your GPU is basically cooking itself. In my experience, about 70% of the overheating GPUs I repair have original thermal paste that's dried out or cracked. It's not a matter of if you'll need to replace it—it's when.
How do thermal pads and paste work?
Thermal pads and thermal paste are both thermal interface materials (TIMs)—they fill microscopic gaps between the GPU chip or memory modules and the heatsink. Thermal paste is a viscous compound used on the GPU die itself, while thermal pads are thicker, pliable sheets used on VRAM and VRM components. They conduct heat far better than air, so without them, your GPU would overheat in seconds. The key difference is that paste is for direct chip contact, while pads accommodate height differences and uneven surfaces.
When should you replace thermal pads and paste?
If your GPU is hitting 85°C or higher under load, or if you're seeing thermal throttling (clock speeds dropping), it's time to check. Other signs include fans running at max speed constantly and increased noise. For most cards, replacing thermal paste every 3–4 years is a good rule of thumb. Thermal pads last longer—usually 5–6 years—but they can dry out too, especially in humid conditions. I recommend inspecting them whenever you have the cooler off, even if you're just cleaning dust out of the heatsink.
What tools and materials do you need?
Here's the thing: you don't need fancy equipment. For a basic thermal pad and paste replacement, you'll need:
- Phillips-head screwdriver (usually #00 or #0)
- Isopropyl alcohol (90% or higher) and coffee filters or lint-free cloth
- New thermal paste (I recommend a high-quality one like Noctua NT-H1 or Thermal Grizzly Kryonaut)
- Thermal pads of the correct thickness (1.0mm and 1.5mm are most common, but check your card's spec)
- Anti-static wrist strap (optional but recommended)
You can buy a complete thermal pad kit for around HK$150–300, depending on the brand and size. For a single card, you'll spend less than HK$100 on materials.
Step-by-step: How to replace thermal pads and paste
Here's the process I use in my workshop every day. Take your time—this isn't a race.
- Power down and unplug the computer, then remove the graphics card from the PCIe slot.
- Remove the cooler: Unscrew the screws on the back of the card, and gently lift the cooler off. Be careful not to pull any fan cables.
- Clean the old TIM: Use the isopropyl alcohol and coffee filters to wipe the old paste from the GPU die and the heatsink. For thermal pads, peel them off and clean any residue.
- Apply new thermal paste: Place a small dot (about the size of a grain of rice) in the center of the GPU die. Don't spread it—the pressure from the heatsink will do that.
- Cut and place thermal pads: Measure the thickness needed for each component (use the old pads as a guide). Cut the new pads to size and place them on the VRAM and VRM modules.
- Reassemble: Put the cooler back on, tighten the screws in a diagonal pattern, and reconnect fan cables.
- Test: Boot up and run a stress test like FurMark or Unigine Heaven for 15 minutes. Monitor temperatures with MSI Afterburner.
What are common mistakes to avoid?
I've seen plenty of botched DIY repairs, and most come down to a few avoidable errors. First, using the wrong thickness of thermal pads is a big one—if the pad is too thick, it won't make proper contact with the heatsink; too thin, and it won't fill the gap. Second, applying too much thermal paste can actually insulate the chip. Third, not cleaning the old paste thoroughly leaves air bubbles that trap heat. Finally, overtightening screws can warp the PCB or crack the GPU die. If you're not confident, it's better to seek professional help than risk damaging a card that costs thousands of dollars.
What is the cost of professional GPU thermal repair in Hong Kong?
If DIY isn't your thing, or if your card is still under warranty (note: DIY repair usually voids warranty), professional services are available. In Hong Kong, a basic thermal paste replacement costs around HK$300–500, depending on the shop and the card model. Thermal pad replacement is a bit more, typically HK$500–800, because it requires more labor and materials. At ComputerKing, we offer a comprehensive GPU thermal service that includes cleaning, new paste, and new pads for HK$450 for most cards. We've seen over 10,000 cases, so we know exactly what your GPU needs. Plus, we use high-quality materials that last longer in Hong Kong's humid climate.
How can you tell if your GPU is actually fake or refurbished?
This is a growing problem in Hong Kong, and it's worth mentioning here because fake cards often have poor thermal performance. We've seen RTX 4090s that were actually older, lower-end cards with modified BIOS and shroud. How to spot them? Check the GPU die markings—a real RTX 4090 has an AD102 chip. Run GPU-Z to verify the silicon and memory configuration. Also, compare the card's physical dimensions and weight against official specs; fakes are often lighter. If you bought a card that's suspiciously cheap, it's probably fake. In that case, thermal repair won't help—you'd need a refund, not a fix.
How does humidity affect GPU thermals over time?
Moisture in the air can cause corrosion on the PCB and connector pins, which increases electrical resistance and heat generation. Over time, this can lead to intermittent failures and even short circuits. That's why I always recommend keeping your computer in a well-ventilated area, away from windows where condensation might form. Using a dehumidifier in summer can help too. In my experience, cards that are stored in damp environments need thermal pad replacement more frequently—sometimes every 2–3 years instead of 5–6.
What should you do if your GPU still overheats after new thermal pads?
If you've replaced the thermal pads and paste and temperatures haven't dropped, the problem might be elsewhere. Check that the fans are spinning properly—maybe the fan motor is failing. Also, inspect the heatsink for dust buildup; a clogged heatsink can't dissipate heat even with fresh TIM. In some cases, the GPU chip itself might be failing, which requires more advanced repair like BGA reballing. That's not a DIY job. If you're in Hong Kong, bring it to a professional like ComputerKing—we have the tools and expertise to diagnose and fix deeper issues.
Frequently Asked Questions
Q: How often should I replace thermal paste on my GPU in Hong Kong?
A: In Hong Kong's humid climate, I recommend every 3–4 years. If you notice temperatures rising or fans getting louder, check the paste sooner.
Q: Can I use thick thermal paste instead of thermal pads?
A: No, thermal pads are necessary for components with height differences like VRAM. Paste alone won't fill those gaps effectively.
Q: Does replacing thermal pads void my GPU warranty?
A: In most cases, yes. Check your warranty terms before opening the card. If under warranty, contact the manufacturer or retailer first.
Q: How much does it cost to replace thermal pads at ComputerKing?
A: Our thermal pad and paste service starts at HK$450, including cleaning and high-quality materials. Contact us at WhatsApp 2186 8010 for a quote.
Conclusion
Dealing with GPU overheating is a rite of passage for any PC gamer in Hong Kong. With the right tools and a bit of patience, you can fix it yourself and save money. But if you're unsure or want a guarantee, don't hesitate to reach out to professionals. At ComputerKing, we've been repairing GPUs for over 15 years, handling everything from thermal issues to BGA failures. If you need help, WhatsApp us at 2186 8010 or visit our shop. Your GPU will thank you.
*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: 2026-08-23*