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Alphacool Subzero vs Phobya Thermal Pad Ultra 5W/mK: Comparison
What is the difference between Alphacool Subzero and Phobya Thermal Pad Ultra 5W/mK?
The first real difference is recommended use: Alphacool Subzero High-end CPU/GPU against Phobya Thermal Pad Ultra 5W/mK Mainstream CPU/GPU; Phobya also markets it for VRAM, VRM,.... Paste segment is not the same on both, Standard Paste on the Alphacool Subzero versus Pad on the Phobya Thermal Pad Ultra 5W/mK.
Alphacool Subzero vs Phobya Thermal Pad Ultra 5W/mK: which one fits your build
Take the Alphacool Subzero for high-end CPU and GPU builds, including overclocking, wanting the highest non-liquid-metal conductivity available. The same goes for builders who want liquid metal-adjacent performance without the electrical conductivity risk. It is not the one for budget builds where Arctic MX-4 or MX-6 deliver adequate performance for less. it is not built for buyers wanting Phobya's higher-conductivity Thermal Pad XT line instead. It also earns its place with VRAM, VRM, and mainboard chipset cooling needing a compressible pad to bridge height differences up to 4mm. Avoid it for CPU IHS-to-cooler contact where a conventional paste offers thinner bond lines. Our rating of the Alphacool Subzero (6.6/10): A high-performance silicone-based compound from Alphacool with a strong published conductivity figure. Our rating of the Phobya Thermal Pad Ultra 5W/mK (5.8/10): A small single-piece pad with modest conductivity, a niche fit for specific gap sizes.
What Alphacool Subzero and Phobya Thermal Pad Ultra 5W/mK have in common
Everything else lines up. Electrical conductivity read the same on both, so those are not worth weighing.
Specs and benchmarks
Brand
- Alphacool Subzero
- Alphacool
- Phobya Thermal Pad Ultra 5W/mK
- Phobya
Model
- Alphacool Subzero
- Alphacool Subzero , Subzero
- Phobya Thermal Pad Ultra 5W/mK
- Phobya Thermal Pad Ultra 5W/mk
Electrical Conductivity
- Alphacool Subzero
- Insulating
- Phobya Thermal Pad Ultra 5W/mK
- Insulating
Package Size
- Alphacool Subzero
- 1g / 3.5g / 20g tubes
- Phobya Thermal Pad Ultra 5W/mK
- 15 x 15 x 4mm, sold as a single piece; also available in other sizes up to 120x20mm strips
Recommended Use
- Alphacool Subzero
- High-end CPU/GPU (including overclocking)
- Phobya Thermal Pad Ultra 5W/mK
- Mainstream CPU/GPU; Phobya also markets it for VRAM, VRM, and North/Southbridge cooling
Paste Segment
- Alphacool Subzero
- Standard Paste
- Phobya Thermal Pad Ultra 5W/mK
- Pad
Which one should you pick?
Choose Alphacool Subzero if you already have it on hand or find it at a lower price.
Choose Phobya Thermal Pad Ultra 5W/mK if you already have it on hand or find it at a lower price.
Price comparison
| Retailer | Alphacool Subzero | Phobya Thermal Pad Ultra 5W/mK |
|---|---|---|
| Newegg | View on Newegg | View on Newegg |
| Amazon | View on Amazon | |
| Performance-PCs | View on Performance-PCs |
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Verdict
Alphacool Subzero
6.6 / 10 Expert Rating
A high-performance silicone-based compound from Alphacool with a strong published conductivity figure.
Phobya Thermal Pad Ultra 5W/mK
5.8 / 10 Expert Rating
A small single-piece pad with modest conductivity, a niche fit for specific gap sizes.