Deepcool G40
- Material:
- Silicone-Based
- Thermal Conductivity:
- 5.2 W/mK
- Electrical Conductivity:
- Non-Conductive
- Recommended Use:
- High-end CPU/GPU
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Manufacturer: Deepcool Last updated: 2026-09-15
Deepcool G40 (Silicone-Based/Non-Conductive/5.2 W/mK/Overclocking-Focused Paste) Review
Deepcool G40 is the larger 4g sibling to G15, an identical silicone-based, nanotechnology-processed thermal paste officially rated at 5.2 W/mK and marketed at the overclocking community.
G40 and G15 share the same formula and the same 5.2 W/mK rating, the only real difference is grease weight: 4g here versus 1.5g for G15. If you're maintaining multiple systems, doing repeat reapplications, or just don't want to run out mid-build on a dual-GPU or CPU-plus-GPU repaste, G40 is the more practical buy for essentially the same per-gram formula.
Thermal Performance and Conductivity
Officially rated at 5.2 W/(m·K), identical to G15, positioning it as a mid-tier overclocking compound above Deepcool's Z-series but below the DS7/DS9 lines.
Compound Type and Composition
Same organosilicon, nanotechnology-processed formula as G15.
Application and Consistency
Syringe packaging, same stable and non-volatile nanotech formula as G15, just more of it.
Electrical Safety
Non-conductive and corrosion resistant, per Deepcool.
Comparison to Sibling Products
Identical conductivity to G15; the deciding factor between the two is simply how much paste you need per purchase.
Specifications
Quantity, volume versus weight
| Density | 2.6 g/cm3 |
|---|
| Thermal Conductivity | 5.2 W/mK |
|---|---|
| Electrical Conductivity | Insulating |
| Package Size | 4 g grease weight (16 g net weight incl. syringe) |
| Recommended Use | High-end CPU/GPU (marketed for the overclocking community and extreme gamers) |
| Material | Silicone-Based (Deepcool describes it as an "organosilicon material" using nanotechnology) |
| Operating Temperature | -50°C to +240°C |
| Paste Segment | Standard Paste |
| Min Operating Temp | -50 C |
| Max Operating Temp | 240 C |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Multiple installs, dual-GPU setups, or repeat reapplications from one tube
- Overclockers who want the G-series conductivity in a larger package
Not for
- Single-install buyers who don't need 4g of paste (G15's 1.5g is cheaper and sufficient)
- Buyers who need DS7/DS9-tier top-end conductivity
FAQs
What are the key specifications of the Deepcool G40 (Silicone-Based/Non-Conductive/5.2 W/mK/Overclocking-Focused Paste)?
The Deepcool G40 (Silicone-Based/Non-Conductive/5.2 W/mK/Overclocking-Focused Paste) is a thermal paste from Deepcool. Key specs: Form Paste, Material Silicone-Based (Deepcool describes it as an "organosilicon material" using nanotechnology), Thermal Conductivity 5.2, Electrical Conductivity Non-Conductive, Recommended Use High-end CPU/GPU (marketed for the overclocking community and extreme gamers).
Will the Deepcool G40 (Silicone-Based/Non-Conductive/5.2 W/mK/Overclocking-Focused Paste) work with my current setup?
The Deepcool G40 (Silicone-Based/Non-Conductive/5.2 W/mK/Overclocking-Focused Paste) lists Thermal Conductivity is 5.2. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the Deepcool G40 (Silicone-Based/Non-Conductive/5.2 W/mK/Overclocking-Focused Paste) best suited to?
It suits multiple installs, dual-gpu setups, or repeat reapplications from one tube, overclockers who want the g-series conductivity in a larger package.
What are the drawbacks of the Deepcool G40 (Silicone-Based/Non-Conductive/5.2 W/mK/Overclocking-Focused Paste)?
It is a poor fit for single-install buyers who don't need 4g of paste (g15's 1.5g is cheaper and sufficient), buyers who need ds7/ds9-tier top-end conductivity.
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