JOYJOM PTM7950 40x40x0.25mm Thermal Pad or JOYJOM 2 Pack 30x30x0.25mm PTM7950? Which JOYJOM Model to Buy
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The joyjom 2 pack 40x40x0 25mm ptm7950 vs 2 pack 30x30x0 25mm ptm7950 comparison focuses on size. Both are phase-change thermal pads with 8.5 W/m·K conductivity. They share identical thickness and operating temperature. The main difference is the surface area. You must match the pad dimensions to your component. This guide explains how the size change affects your installation.
Key differences
| Aspect | JOYJOM PTM7950 40x40x0.25mm Thermal Pad | JOYJOM PTM7950 30x30x0.25mm Thermal Pad |
|---|---|---|
| Dimensions | 40x40x0.25mm | 30x30x0.25mm |
| Compatible Device | GPU, CPU | Integrated-circuit devices |
| Width | 1.57 inches | 1.18 inches |
| Length | 1.57 inches | 1.18 inches |
| Weight | 1.76 ounces | 1.41 ounces |
Which one should you choose?
Choose JOYJOM PTM7950 40x40x0.25mm Thermal Pad if
- You need to cover larger GPU or CPU surfaces.
- Your component requires a 40x40mm footprint.
- You want the included accessories listed for the larger pad.
Choose JOYJOM PTM7950 30x30x0.25mm Thermal Pad if
- You are covering smaller integrated-circuit components.
- Your space is limited to a 30x30mm area.
- You prefer a lighter thermal pad for the application.
Verdict: Choose the 40x40mm pad if you are cooling larger components like GPUs or CPUs. Select the 30x30mm pad for smaller integrated circuits where space is restricted. Both offer the same thermal performance per unit area.
40mm vs 30mm Pad Selection
Surface Coverage
The JOYJOM PTM7950 40x40x0.25mm Thermal Pad measures 40 by 40 millimeters. This larger footprint covers more surface area than the 30 by 30 millimeter option. If your GPU memory chips or voltage regulator modules are spaced widely, the 40mm pad provides better coverage without needing multiple pieces. The JOYJOM PTM7950 30x30x0.25mm Thermal Pad is smaller. You need it when components are tightly packed or have smaller contact areas. The 30mm size fits compact layouts where the larger pad would overlap or touch neighboring components. You must measure your target chips first. The 40mm pad is the clear choice for larger heat sources. The 30mm pad is better for smaller, tighter spaces. This is a tie in utility, as each size serves a different physical requirement.
Weight and Handling
The JOYJOM PTM7950 40x40x0.25mm Thermal Pad weighs 1.76 ounces for the package. The larger material adds slight weight. The JOYJOM PTM7950 30x30x0.25mm Thermal Pad weighs 1.41 ounces. The smaller pad is lighter. Both packages include similar accessories like gloves, wipes, and tools. The weight difference is minimal. It does not affect thermal performance. You might notice the 40mm package is slightly heavier in your hand. This does not impact installation. Both pads share the same 0.25mm thickness. The handling difficulty is identical for both. You need the same care when peeling films. There is no practical advantage for one over the other based on weight alone.
Thermal Performance
Both pads use PTM7950 Phase Change Material. They share an 8.5 W/m·K thermal conductivity rating. The phase-change temperature is 45°C for both. They both maintain low thermal impedance below 0.04°C cm²/W without a shim. The material properties are identical. The 40mm pad covers more area, which can help spread heat from larger chips more evenly. The 30mm pad concentrates thermal transfer on a smaller, precise area. For the same chip size, the smaller pad might require more precise alignment. However, the thermal conductivity is the same. Neither pad heats up faster or cools down faster than the other. The performance depends on how well you match the pad to the chip size. This is a tie in raw material capability.
Component Compatibility
The JOYJOM PTM7950 40x40x0.25mm Thermal Pad lists GPU and CPU as compatible devices. The larger size is versatile for many standard graphics card layouts. The JOYJOM PTM7950 30x30x0.25mm Thermal Pad lists integrated-circuit devices. The smaller size is ideal for specific VRMs or smaller memory modules. You must check the spacing between your memory chips. If the gap is wide, the 40mm pad works. If the gap is narrow, the 30mm pad fits better. The 30mm pad offers an edge for compact or densely packed components where the 40mm pad would be too large. The 40mm pad is the choice for broader compatibility with larger heatsink surfaces. You choose based on your specific hardware dimensions.
Included Accessories
Both packages include a screwdriver, cleaning wipe, spatula, finger gloves, and a cleaning brush. The JOYJOM PTM7950 40x40x0.25mm Thermal Pad includes pull-tab stickers. The JOYJOM PTM7950 30x30x0.25mm Thermal Pad includes adhesive pull tabs. These items serve the same purpose. They help with film removal and handling. The 30mm package mentions chilling the pad to help with peeling. This is a usage tip, not a different accessory. Both kits provide the tools needed for installation. The content is functionally identical. You get the same support for proper application. There is no significant difference in the value or utility of the included items. Both packages are complete for a standard installation.
Which JOYJOM PTM7950 Pad Fits You
Users with wide GPU memory spacing
The 40 by 40 millimeter pads cover a larger surface area. This size is ideal if your VRMs or memory chips are spaced widely. The 8.5 W/m·K conductivity ensures efficient heat transfer across the broader footprint. You get two pads, plus tools like a spatula and cleaning brush for installation. The phase-change material adapts to the larger gap effectively.
Users with compact component layouts
The 30 by 30 millimeter pads fit tighter spaces. This size suits components with closer spacing, such as smaller memory chips. The thermal conductivity remains at 8.5 W/m·K, matching the larger option. You receive two pads and similar accessories, including pull tabs and gloves. The lower weight and smaller dimensions make handling easier for precise placement on compact circuits.
Users needing extra material for errors
Both options include two pads, but the larger size offers more material per unit. If you are new to phase-change materials, the extra surface area provides a margin for error during alignment. The 40 by 40 millimeter pads are easier to position broadly. You still get the full accessory kit, including cleaning wipes and a brush, ensuring a clean surface before application.
The products compared
JOYJOM PTM7950 40x40x0.25mm Thermal Pad
Best for: Larger GPU VRM or CPU heatsink coverage
- Compatible Device
- CPU, GPU, SSD
- Dimensions
- 40×40×0.25 mm
- Features
- Thermal Pad
- Weight
- 1.76 ounces
View on Amazon: JOYJOM PTM7950 40x40x0.25mm Thermal Pad Affiliate link
This JOYJOM thermal pad measures 40x40x0.25mm and uses phase change material for CPU and GPU cooling. It offers 8.5 W/m·K conductivity and activates at 45°C. The package includes two pads and installation tools. You need proper handling skills for best results. This size suits larger heatsinks or VRM areas where the smaller 30x30mm option would not cover the surface adequately.
Pros
- 40x40x0.25mm dimensions for broader coverage
- 8.5 W/m·K thermal conductivity
- Phase change material starts melting at 45°C
- Low thermal impedance under 0.04°C cm²/W
- Includes screwdriver, cleaning wipe, and spatula
Cons
- Requires professional handling skills for installation
- Larger size may not fit smaller components
- Melting under high temperature is normal behavior
Good fit if
- You need pads for larger GPU or CPU surfaces
- You want included tools for easier installation
- You prefer phase change material over traditional pads
Skip if
- You are cooling small components requiring 30x30mm pads
- You lack experience with phase change materials
- You need pads for tight spaces under 40mm
Verdict: JOYJOM 40x40mm PTM7950 Thermal Pad fits users who need larger coverage for high-performance GPU or CPU cooling. It provides reliable heat dissipation for components that exceed the size of the 30x30mm alternative.
JOYJOM PTM7950 30x30x0.25mm Thermal Pad
Best for: smaller integrated circuit devices
- Compatible Device
- CPU, GPU, SSD
- Dimensions
- 30x30x0.25mm
- Features
- Thermal Pad
- Weight
- 1.41 ounces
View on Amazon: JOYJOM PTM7950 30x30x0.25mm Thermal Pad Affiliate link
This 2-pack of 30x30x0.25mm phase-change thermal pads uses PTM7950 material for high performance. It features 8.5 W/m·K thermal conductivity and activates at 45°C. The low thermal impedance helps dissipate heat from integrated circuits. It includes tools for installation. You should buy this if your components require smaller pads than the 40x40mm option on this list.
Pros
- 8.5 W/m·K thermal conductivity
- Phase-change material for long service life
- Includes screwdriver, cleaning wipes, and spatula
- Low thermal impedance under 0.04 °C·cm²/W
Cons
- 30x30mm size is smaller than the 40x40mm alternative
- Requires professional handling and technical know-how
- Must be chilled for easier film removal
Good fit if
- You need 30x30mm pads for smaller components
- You want phase-change material for stability
- You prefer a kit with installation tools
Skip if
- You require 40x40mm pads for larger heatsinks
- You lack experience with thermal pad installation
- You want a simpler plug-and-play solution
Verdict: JOYJOM 30mm PTM7950 Thermal Pad is a practical option for users who need smaller 30x30mm pads. It offers high thermal conductivity and includes necessary tools for installation.
Specifications side by side
| Spec | JOYJOM PTM7950 40x40x0.25mm Thermal Pad | JOYJOM PTM7950 30x30x0.25mm Thermal Pad |
|---|---|---|
| Compatible Device | CPU, GPU, SSD | CPU, GPU, SSD |
| Dimensions | 40×40×0.25 mm | 30x30x0.25mm |
| Features | Thermal Pad | Thermal Pad |
| Weight | 1.76 ounces | 1.41 ounces |
Frequently asked questions
Can I use the 40x40mm pads on a standard CPU cooler?
The 40 by 40 millimeter pads are designed for larger GPU VRMs or CPU heatsink coverage. You should verify that your component spacing matches these dimensions. Using them on smaller areas may result in excess material. The 30 by 30 millimeter option is better for smaller integrated circuit devices.
Do both pads share the same thermal conductivity rating?
Yes, both models offer high thermal conductivity. The data confirms they are both phase-change thermal pads. They share identical thickness and operating temperature ranges. The primary difference lies in their surface area coverage rather than their thermal performance specifications.
Which model is lighter?
The 30 by 30 millimeter pad weighs 1.41 ounces. The 40 by 40 millimeter pad weighs 1.76 ounces. Both pads have a height of 0.09 inches. You should choose the size that fits your component spacing, as the weight difference is minimal.
Is the 30mm pad suitable for wide-spaced memory chips?
The 30 by 30 millimeter pad is practical for smaller integrated circuit devices. It may not cover wide-spaced memory chips effectively. The 40 by 40 millimeter alternative provides larger coverage. You should match the pad size to the specific spacing of your GPU memory or voltage regulator modules.
What are the exact dimensions of the 40mm pad?
The 40 by 40 millimeter pad measures 1.57 inches in length and width. Its height is 0.09 inches. It is compatible with GPU components. This larger footprint ensures reliable heat dissipation for components that exceed the size of the 30 by 30 millimeter alternative.
Does the 30mm pad come with installation tools?
The 30 by 30 millimeter thermal pad includes necessary tools for installation. It offers high thermal conductivity for efficient heat transfer. This makes it a practical option for users needing smaller pads. The included tools assist in applying the phase-change material correctly to your components.