Your laptop runs hot, and you’re deciding: buy an external cooling pad (£30–60), or open it up and repaste (£15–25 in supplies)? The answer is: they solve different problems. This guide compares real temperature improvements, cost-effectiveness, and explains why the best solution is often both. For a comprehensive thermal solution, see our complete laptop overheating solutions guide.
| Aspect | External Cooling Pad | Internal Repasting | Winner |
|---|---|---|---|
| Temperature Drop | 5–8°C ambient | 10–20°C CPU/GPU | Repasting (internal reduction) |
| Cost | £30–80 | £15–25 (one-time tools) | Repasting (lower cost) |
| Warranty Impact | None (external only) | Voids warranty (must open) | Cooling pad (safe) |
| Effort Required | Place under laptop | 30–60 minutes + skill | Cooling pad (easier) |
| Permanence | Temporary (can remove) | Long-term (lasts 3–5 years) | Repasting (permanent fix) |
| Best Use Case | Under warranty, quick fix | Out of warranty, sustained thermal loads | Depends on situation |
How Cooling Pads Work (and Their Limits)
What Cooling Pads Do
An external cooling pad sits under your laptop and blows cool air upward into the bottom vents. This reduces the ambient temperature around your laptop’s intake air, which slightly lowers internal CPU/GPU temperatures.
Real Temperature Improvements
Testing on a Dell G15 with degraded thermal paste:
- Without cooling pad: CPU 95°C under gaming load (throttling).
- With quality cooling pad (Cooler Master): CPU 88°C (7°C improvement).
- Room ambient temperature 22°C: With cooling pad in warm room (26°C), advantage drops to 4–5°C.
Key finding: Cooling pads reduce ambient temperature around the laptop by 3–8°C, which translates to 5–8°C CPU/GPU temperature reduction. Useful, but not a permanent fix for degraded paste.
Why Cooling Pads Have Limits
- Ambient-dependent: In a 20°C room, they provide 7–8°C benefit. In a 28°C room, only 3–4°C.
- Internal paste still limits cooling: Even with cooler intake air, bad thermal paste prevents heat from reaching the heatsink. Cooling pads can’t fix bad internal paste contact.
- Sustained load plateau: After 2–3 hours of gaming, the cooling pad’s benefit plateaus—the laptop’s internal heat reaches equilibrium regardless of cooling pad airflow.
How Repasting Works (and Its Advantages)
Direct Heat Transfer Improvement
New thermal paste dramatically improves heat transfer from CPU die to heatsink. This is an internal, permanent fix.
Real Temperature Improvements
Same Dell G15 with repasting instead of cooling pad:
- Before repasting: CPU 95°C (throttling).
- After repasting with Arctic MX-6: CPU 75°C (20°C improvement).
- Room ambient 22°C or 28°C doesn’t matter much—internal paste improvement is independent of room temperature.
Key finding: Repasting reduces CPU/GPU temperature by 10–20°C, regardless of ambient conditions. This is a fundamental, permanent improvement.
Why Repasting is More Effective
- Root cause fix: Degraded paste is the problem; new paste solves it directly.
- Ambient-independent: Works in cold rooms, warm rooms, anywhere. Heat transfer improvement is internal.
- Long-term solution: New paste lasts 3–5 years. Cooling pad must be used every gaming session.
- Combined with undervolting: Repasting + undervolting drops temps another 5–15°C (cooling pads don’t compound improvement).
Cost Analysis: Cooling Pad vs. Repasting Over Time
One-Time Costs
- Quality cooling pad: £50–80 (good brands like Cooler Master, TRNM).
- Repasting (tools + supplies): £35–50 one-time, then £5–8 per future repasting (3–4 year intervals).
5-Year Cost Projection
Cooling pad approach:
- Initial investment: £60.
- Electricity cost for 2 hours daily gaming: ~£15/year.
- Total 5-year cost: £135 + still have the thermal problem (bad paste).
Repasting approach:
- Initial tools: £40 (one-time).
- Repasting at year 3: £6 (paste only, tools already owned).
- Total 5-year cost: £46, plus thermal problem is permanently fixed.
Winner: Repasting is 3x cheaper over 5 years and actually solves the problem.
The Best Solution: Combined Approach
Why Use Both?
For maximum thermal performance:
- Repaste first (fixes internal heat transfer).
- Add cooling pad during intense gaming (drops ambient temp, gives you extra margin).
- Combined effect: 20°C internal improvement + 7°C ambient improvement = 27°C total temperature drop.
Example: Gaming laptop hitting 95°C with bad paste → 75°C after repasting → 68°C with cooling pad added → massive performance gain with no throttling.
Cost of Combined Approach
- Repasting supplies: £40 (one-time).
- Cooling pad: £50–70.
- Total: £90–110 for a permanent, maximum-performance setup.
Compared to: Professional laptop thermal repair (£80–150 labour) + cooling pad (£50) = £130–200. DIY combined approach is competitive in price, complete in control. Learn the full process in our thermal paste replacement guide and cooling pad comparison.
When to Choose Cooling Pad Only
Your Laptop is Under Warranty
Opening your laptop voids the warranty. If you have 6+ months of coverage left, use a cooling pad to stay safe. If thermals are unbearable, contact the manufacturer for repasting service.
You’re Uncomfortable Opening Your Laptop
Repasting requires skill and confidence. If you’re not comfortable with small screws, delicate components, and risk of damage, a cooling pad is the safer bet. You can’t break anything external.
Temporary Thermal Crisis
Summer heat wave incoming. You need immediate relief while waiting to schedule a repasting. Cooling pad gives you 5–8°C immediately.
Budget Constraints Right Now
Cooling pad costs £50 upfront. Repasting tools cost £40, but you also need confidence in the process. If cash-constrained now, cooling pad is the quick fix; repasting later when you’re ready.
When to Choose Repasting Only
Laptop is Out of Warranty
No risk to opening it. Repasting is the permanent fix worth the effort.
You Game Heavily (2+ Hours Daily)
Heavy gaming stresses thermal paste degradation. Repasting ensures 3–5 years of stable performance. Cooling pad would need to run constantly, consuming electricity.
Sustained Workloads (Rendering, ML Training)
Workstations run 8+ hours under load. Repasting is the only real solution—cooling pads can’t sustain improvement on continuous high load. Premium paste like Noctua NT-H2 is ideal.
You’re Confident with Technical Tasks
You’ve built PCs, upgraded laptops, or done similar work. Repasting is straightforward and within your skill level. Save the money; skip the pad.
Cooling Pad Recommendations (If Buying)
Best Value: Cooler Master NotePal
- Amazon UK: £25–40.
- Quiet fans, good airflow, lightweight.
- Provides 6–8°C temperature reduction in typical conditions.
Premium Option: TRNM Laptop Cooling Pad
- Amazon UK: £45–65.
- Advanced airflow design, multiple fan speeds.
- Best for gaming laptops—provides maximum cooling.
Budget Option: Zalman ZM-NC1000
- Amazon UK: £15–25.
- Basic but functional. 4–5°C improvement (less than premium).
- Good if on a tight budget.
Avoid Ultra-Cheap Pads (Under £15)
They provide 2–3°C improvement only, make noise, and break easily. Better to save and buy a decent pad or invest in repasting instead.
Decision Tree: Cooling Pad or Repasting?
Is your laptop under warranty? → Cooling pad.
Are you uncomfortable opening laptops? → Cooling pad.
Is your laptop out of warranty and 2+ years old? → Repasting.
Do you game 2+ hours daily? → Repasting (long-term solution).
Do you have sustained high-load workloads? → Repasting (cooling pad can’t sustain).
Do you want maximum performance immediately? → Cooling pad (instant relief).
Do you want the best long-term value? → Repasting (cheaper, permanent).
Ideal answer: Both. Repaste first, add cooling pad for peak performance during intensive sessions.
Frequently Asked Questions
Can a cooling pad damage my laptop?
No. Cooling pads provide external airflow only. No risk of damage, short circuits, or voiding warranties. Completely safe.
Do cooling pads work better on thin laptops vs. thick gaming laptops?
Gaming laptops benefit less (more airflow design already) than thin ultrabooks (poor intake design). But both see 5–8°C improvement. The improvement percentage is larger on thin laptops (bigger proportional gain).
Can I use a cooling pad while repasting, or should I choose one?
Absolutely use both. Repaste in the first 24 hours (cooling pad uses after curing), then add the cooling pad whenever you game. Optimal combination.
Does undervolting replace the need for cooling pads?
Undervolting reduces heat generation (5–15°C improvement). Cooling pads reduce ambient temperature. They’re complementary. Repast + underclock + cooling pad = maximum effect.
How long do cooling pads last?
Quality pads last 3–5 years of daily use. Fans eventually slow, efficiency drops. Budget for replacement around year 4.
Will repasting void my warranty if the laptop is still under coverage?
Yes, opening the laptop voids the warranty immediately. Wait until your warranty expires, or contact the manufacturer about repasting service within warranty.
Recommended Products
These are the products we recommend based on this guide. All links go to Amazon UK where you can check current prices and availability.
| Product | Why We Recommend It | Amazon UK |
|---|---|---|
| Corsair Vengeance DDR4 SO-DIMM 32GB (2×16GB) 3200MHz | Best overall DDR4 upgrade kit | View on Amazon UK |
| Kingston Fury Impact DDR4 SO-DIMM 32GB (2×16GB) 3200MHz | Reliable alternative with tight latency | View on Amazon UK |
| Crucial DDR4 SO-DIMM 16GB 3200MHz | Budget single-stick upgrade | View on Amazon UK |
| Samsung DDR4 SO-DIMM 32GB 3200MHz | OEM-quality for business laptops | View on Amazon UK |
| Thermal Grizzly Kryonaut | Best thermal paste for laptop repasting | View on Amazon UK |
| Noctua NT-H1 | Easy-to-apply, excellent for beginners | View on Amazon UK |
| Arctic MX-6 | Budget thermal paste with good performance | View on Amazon UK |
| IETS GT500 Laptop Cooling Pad | Powerful external cooling for gaming laptops | View on Amazon UK |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
