Why Correct Thermal Pads are Crucial for Your RTX 3070
Thermal pads are a critical interface, transferring heat away from vital components such as VRAM (Video Random Access Memory) modules, VRMs (Voltage Regulator Modules), and other ICs on the PCB to the main heatsink assembly. Efficient heat dissipation is essential for preventing overheating.
Using degraded, old, or incorrectly sized thermal pads can lead to significant issues:
- Increased Operating Temperatures: This can cause thermal throttling, where the GPU reduces its performance to prevent heat damage.
- System Instability: Overheating may result in crashes, screen artifacts, or other frustrating issues during intensive use.
- Reduced GPU Lifespan: Prolonged exposure to high temperatures can accelerate component degradation, shortening your card's life.
Replacing thermal pads with new, high-quality ones of the correct 1mm thickness is an important step to keep your Gainward RTX 3070 Phoenix or PNY RTX 3070 XLR8 running cool and efficiently.
Accurate Thermal Pad Sizes for Gainward GeForce RTX 3070 Phoenix / PNY RTX 3070 XLR8
All thermal pads required for these models are reported to be 1mm thick. Below are the specific dimensions for each pad. Please pay close attention to the notes regarding Pads A (11) and B (10), as there are potential discrepancies in the initially reported sizes versus expected/more common sizes for similar components.
Specific Pad Dimensions (All 1mm Thick):
- Pad A (11): 73.7mm x 5.2mm x 1mm
- Important Note: This dimension is reported as potentially incorrect. It is suggested that the actual size for Pad A (11) should be between 40x15mm – 50x15mm. Users should verify this during disassembly.
- Pad B (10): 82.1mm x 5.2mm x 1mm
- Important Note: Similar to Pad A, this dimension is reported as potentially incorrect. It is suggested that the actual size for Pad B (10) should be between 40x15mm – 50x15mm. Users should verify this during disassembly.
- Pad C (12): 27.1mm x 14.2mm x 1mm
- Pad D (1): 61mm x 5.5mm x 1mm
- Pad D (7): 9.5mm x 9.5mm x 1mm
- Pad D (3, 4, 5, 6): Four (4) pieces, each 7mm x 7mm x 1mm
- Pad D (2): 62mm x 7mm x 1mm
- Pad D (8, 9): Two (2) pieces, each 20mm x 7mm x 1mm

Purchasing Recommendation:
To cover all required parts on the front of the PCB, you will need a good amount of 1mm thick thermal pad material. It's recommended to acquire:
- At least two (2) packages of 85mm x 45mm x 1.0mm thermal pad sheets.
- Alternatively, one (1) package of 100mm x 100mm x 1.0mm thermal pad sheet may also suffice.
This should provide enough material to cut all the individual pieces listed above.
Why Choose Fehonda Thermal Pads?
When replacing thermal pads, the quality of the material is paramount. Fehonda thermal pads are a recommended choice due to several key advantages:
- Premium Quality: Fehonda utilizes high-grade materials, ensuring excellent thermal conductivity and durability for effective, long-lasting cooling.
- Enhanced Cooling: Specifically designed to optimize heat transfer, these 1mm pads help lower the operating temperatures of your GPU's critical components.
- Expertise: Fehonda specializes in thermal interface solutions, bringing dedicated knowledge to their product development.
- Versatile Solutions: Offering thermal pads in various sheet sizes makes it convenient to get the necessary material for custom-cutting all required pieces.
Tips for Replacing Your GPU Thermal Pads
Replacing GPU thermal pads requires precision, patience, and care. If you are unfamiliar with GPU disassembly, it is highly advisable to seek professional assistance or meticulously follow detailed video guides specific to the Gainward RTX 3070 Phoenix or PNY RTX 3070 XLR8.
- Preparation: Gather your tools: new Fehonda 1mm thermal pad sheets, a precision screwdriver set, a sharp craft knife or precision scissors, a ruler or digital calipers, non-metallic prying tools (optional), high-purity isopropyl alcohol (90%+), and lint-free cloths. An anti-static wrist strap is crucial.
- Disassembly & Measurement (Crucial for Pads A & B): Carefully disassemble your graphics card. Before removing the old Pads A (11) and B (10), try to measure their existing dimensions if possible, or carefully measure the components they cover. Compare these measurements to both the listed dimensions and the suggested alternative range (40x15mm – 50x15mm) to determine the best fit. For other pads, verify their sizes against the components.
- Remove Old Pads & Clean: Gently remove all old thermal pad material. Thoroughly clean all component surfaces and heatsink contact points with isopropyl alcohol to remove any residue. Ensure surfaces are dry.
- Cut New Pads: Based on your verified measurements (especially for Pads A and B), precisely cut the new 1mm thick Fehonda thermal pads. Aim for clean, straight cuts.
- Apply New Pads: Remove protective film from one side, apply the pad to the component, then remove the other film just before reattaching the heatsink. Ensure good contact.
- Reapply GPU Thermal Paste: Since the heatsink is removed, clean the old thermal paste from the GPU die and apply a fresh layer of new, high-quality thermal paste.
- Reassembly: Carefully reassemble your graphics card, ensuring even pressure on the heatsink. Do not overtighten screws.
- Testing: Install the card and monitor temperatures under load to confirm a successful replacement.
Disclaimer: Disassembling your graphics card may void its warranty and involves a risk of damage. Proceed at your own risk.
Where to Purchase Fehonda Thermal Pads
For reliable, high-quality Fehonda thermal pad sheets suitable for your Gainward GeForce RTX 3070 Phoenix or PNY RTX 3070 XLR8, online marketplaces like AliExpress are a common source.
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Ensure you purchase sufficient 1mm thick thermal pad material (e.g., two 85x45mm sheets or one 100x100mm sheet) from a reputable seller.
Conclusion: Optimize Your RTX 3070's Cooling Performance
Proper thermal pad replacement is key to maintaining the performance and health of your Gainward GeForce RTX 3070 Phoenix or PNY RTX 3070 XLR8. By using high-quality Fehonda 1mm thermal pad sheets and carefully measuring and cutting the individual pieces (paying special attention to verifying the sizes for Pads A and B), you can significantly improve your GPU's thermal performance, leading to a cooler, potentially quieter, and more reliable experience.