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Arctic MX-4 vs PrimoChill Ultra Extreme XR-m Thermal Pad: Comparison
Arctic MX-4 and PrimoChill Ultra Extreme XR-m Thermal Pad separate most on thermal conductivity: Arctic MX-4 at 8.5 W/mK, PrimoChill Ultra Extreme XR-m Thermal Pad at 17.0 W/mK, 50% in favour of PrimoChill Ultra Extreme XR-m Thermal Pad. They match on electrical conductivity and safety notes.
Specs
| Specification |  |  |
|---|---|---|
| Compound Type | Carbon-Based | Silicone-Based (Solid Pad) |
| Brand | Arctic | PrimoChill |
| Model | Arctic MX-4 , MX-4 | PrimoChill Ultra Extreme XR-m Thermal Pad |
| Thermal Conductivity | 8.5 W/mK-50% | 17.0 W/mK |
| Electrical Conductivity | Insulating | Insulating |
| Package Size | 4g / 8g / 20g / 45g tubes | 60x50mm sheets, multiple thicknesses |
| Recommended Use | Mainstream CPU/GPU (builds on a tight budget) | GPU VRM/MOSFET Cooling, Case-Mod Builds |
| Reapplication Interval | Up to 8 years | Solid sheet avoids pump-out by design |
| Safety Notes | None | None |
| Pump-Out Resistance | Medium | High |
| Paste Segment | Standard Paste | Pad |
| Spec Score | 6.1 | 6.6 |
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