Thermal Grizzly Carbonaut 31x25mm Thermal Pad Alternatives: 6 Similar Picks Compared

How these alternatives compare

Noctua Chromax Dual Tower Heatsink Covers

The Noctua Chromax Dual Tower Heatsink Cover is a cosmetic accessory, not a thermal pad. It measures 6.5 inches wide and weighs 12.3 ounces. This item changes the look of your cooler to black. It does not fill gaps or transfer heat like the Carbonaut. You should pick this if you want to match your chromax fans. It offers no thermal conductivity. The Carbonaut provides 62.5 W/m·K performance. This cover provides visual consistency. Choose this for style, not for cooling VRAM on an RTX 2080 Ti. It is purely an aesthetic upgrade for dual tower coolers.

Noctua Dual-Tower Heatsink Covers, Black

This Noctua heatsink cover is another cosmetic option, not a thermal interface material. It has a black finish and weighs 12.3 ounces. Its dimensions are 2.56 inches wide. It does not conduct heat. It cannot replace the Carbonaut for gap filling. The Carbonaut handles high temperatures up to 150°C. This cover only changes appearance. You should choose this if you want a black look for your dual-tower cooler. It does not help with GPU VRAM cooling. The Carbonaut is functional. This item is decorative. It fits the same coolers but serves a different purpose entirely. Do not expect thermal performance from this plastic or metal cover.

Noctua Dual-Tower White Heatsink Covers

The Noctua NA-HC4 White Heatsink Cover is a cosmetic upgrade, not a thermal pad. It weighs 13.4 ounces and is white. It does not provide thermal conductivity. It cannot fill the 0.2 mm gap like the Carbonaut. The Carbonaut has 62.5 W/m·K conductivity. This cover only changes the color of your cooler. You should pick this if you want a white aesthetic. It does not cool components. The Carbonaut cools VRAM on an RTX 2080 Ti. This item is for looks only. It fits dual-tower coolers but offers no heat transfer. Choose the Carbonaut for performance. Choose this cover for matching your white theme. They are not interchangeable.

Alphacool 14 x 14mm Copper Heatsinks 10-Pack

The Alphacool 14mm Copper Heatsinks are passive cooling blocks, not thermal pads. They are made of copper and weigh 3.84 ounces. They are small blocks for VRAM. They do not fill gaps like the Carbonaut. The Carbonaut is a 0.2 mm thick pad. These are solid copper blocks. They require forced air to work well. The Carbonaut works passively in gaps. You should pick these if you have good case airflow. They do not conduct heat across gaps like the pad. The Carbonaut is for specific gap filling. These are for attaching to chips. They serve different roles. One fills space, the other adds surface area. Do not use them interchangeably.

Awxlumv 300mm Aluminum Passive Heatsink

The Awxlumv 300mm Aluminum Heatsink is a large passive cooler, not a thermal pad. It weighs 1.63 pounds and is silver. It is for power electronics. It does not fill small gaps like the Carbonaut. The Carbonaut is 31 x 25 mm. This heatsink is 300 mm long. It is for transistors and ICs. It needs good airflow. The Carbonaut works in tight spaces on GPUs. This item is for larger components. You should pick this for power supply cooling. It does not fit GPU VRAM gaps. The Carbonaut is for high conductivity in small spaces. This is for large surface area cooling. They are not alternatives for the same application.

ASHATA 1U Passive LGA 2011 Server Heatsink

The ASHATA 1U Passive Heatsink is for server CPUs, not GPU VRAM. It is for LGA 2011 sockets in 1U servers. It does not fill gaps like the Carbonaut. The Carbonaut is for Nvidia RTX 2080 Ti. This heatsink is for Supermicro servers. It weighs 7.69 ounces. It is a passive CPU cooler. The Carbonaut is a thermal pad. They serve different devices. You should pick this only for specific server builds. It does not help with GPU cooling. The Carbonaut fits specific GPU gaps. This heatsink fits server motherboards. They are not comparable. One is a pad, the other is a heatsink. Do not confuse their purposes.

Quick picks

Our 7 picks

1 Best overall

Thermal Grizzly Carbonaut 31x25mm Thermal Pad

Best for: High conductivity gap filling on GPUs

Compatible Device

Nvidia RTX 2080 Ti

Dimensions

31 x 25 x 0.2 mm

Length

1.22 inches

Width

0.98 inches

View on Amazon: Thermal Grizzly Carbonaut 31x25mm Thermal Pad Affiliate link

This is a genuine Thermal Grizzly Carbonaut thermal pad sized at 31 x 25 x 0.2 mm. It offers a high thermal conductivity of 62.5 W/mK. The pad works within a temperature range of -250°C to 150°C. It is designed for components like the Nvidia RTX 2080 Ti. You should use it to bridge gaps between heat sources and sinks. Be careful to avoid short circuits on terminals.

Pros

• High thermal conductivity of 62.5 W/mK
• Specific 31 x 25 x 0.2 mm dimensions
• Wide usable temperature range from -250°C to 150°C
• Compatible with Nvidia RTX 2080 Ti

Cons

• Risk of short-circuiting if attached to terminals
• Single unit size limits multi-component coverage
• No included adhesive or mounting hardware listed

Good fit if

• You need a high-conductivity pad for the Nvidia RTX 2080 Ti
• You require a 31 x 25 mm gap filler
• You need a pad that withstands high heat

Skip if

• You need a larger pad for multiple chips
• You are concerned about terminal short-circuit risks
• You require a pre-adhesive backing

Verdict: Thermal Grizzly Carbonaut 31x25mm Thermal Pad provides high conductivity for specific gaps. It fits users needing precise 31 x 25 mm coverage for high-end GPUs like the RTX 2080 Ti.

2 Also great

Noctua Chromax Dual Tower Heatsink Covers

Best for: Noctua dual tower cooler customization

Material

powder-coated aluminium

Compatible Device

Noctua NH-D15, NH-D15S CPU coolers

Color

Black

Dimensions

24.5 × 6.5 × 21.5 inches

Weight

12.3 ounces

View on Amazon: Noctua Chromax Dual Tower Heatsink Covers Affiliate link

This is an aesthetic add-on heatsink cover for Noctua NH-D15 and NH-D15S dual tower coolers. It is made from powder-coated aluminium and features swappable inlays in six colors. The set includes two covers for both fin-stacks. It measures 24.5 inches in length and weighs 12.3 ounces. You should use it if you want to match your cooler with Noctua’s chromax line fans and anti-vibration pads.

Pros

• Made from high-quality powder-coated aluminium
• Includes swappable inlays in six colors
• Compatible with NH-D15 and NH-D15S dual tower heatsinks
• Easy installation process

Cons

• Only fits Noctua dual tower coolers
• Does not improve cooling performance
• Requires separate purchase of swappable inlays

Good fit if

• You own a Noctua NH-D15 or NH-D15S cooler
• You want to customize your build's color scheme
• You prefer a powder-coated aluminium finish

Skip if

• You have a single tower cooler
• You need a cooler for non-Noctua brands
• You want to improve thermal performance

Verdict: Noctua NA-HC3 chromax Black Swap Heatsink Cover is a cosmetic upgrade for Noctua dual tower coolers. It fits users who want to match their cooler with chromax fans and anti-vibration pads.

3 Also great

Noctua Dual-Tower Heatsink Covers, Black

Best for: Noctua dual-tower cooler aesthetics

Material

powder-coated aluminium

Compatible Device

Noctua NH-D15, NH-D15S CPU coolers

Color

Black

Dimensions

9.65 × 2.56 × 8.46 inches

Weight

12.3 ounces

View on Amazon: Noctua Dual-Tower Heatsink Covers, Black Affiliate link

This aesthetic cover transforms Noctua dual-tower coolers into a sleek, black stealth look. It is made from powder-coated aluminium and fits NH-D15, NH-D15S, and NH-D15S SE-AM4 models. The set includes two covers for both fin-stacks. It measures 9.65 inches long and weighs 12.3 ounces. You should choose this if you want to match your cooler with Noctua’s chromax line fans.

Pros

• Made from powder-coated aluminium for a sleek finish
• Compatible with NH-D15, NH-D15S, and NH-D15S SE-AM4 coolers
• Includes two covers for both fin-stacks
• Easy installation process

Cons

• Does not improve thermal performance
• Only fits specific Noctua dual-tower models
• Adds 12.3 ounces of weight

Good fit if

• You own a Noctua NH-D15 or NH-D15S cooler
• You want a black stealth look for your build
• You want to match your cooler with chromax fans

Skip if

• You need thermal performance improvements
• You have a single-tower cooler
• You use a cooler brand other than Noctua

Verdict: Noctua chromax Black Heatsink Cover is a cosmetic upgrade for Noctua dual-tower coolers. It suits you if you want a black finish that matches your chromax fans.

4 Best premium

Noctua Dual-Tower White Heatsink Covers

Best for: White aesthetic upgrades for Noctua dual-tower coolers

Material

powder-coated aluminium

Compatible Device

Noctua NH-D15, NH-D15S CPU coolers

Color

White

Dimensions

8.46 × 9.65 × 2.56 inches

Weight

13.4 ounces

View on Amazon: Noctua Dual-Tower White Heatsink Covers Affiliate link

This is a Noctua NA-HC4 chromax.White aesthetic add-on for dual-tower CPU coolers. It is made from powder-coated aluminum and comes in a white finish. The set includes two covers for both fin-stacks. It fits NH-D15, NH-D15S, and NH-D15S SE-AM4 models. You get a sleek look that matches other chromax components. It weighs 13.4 ounces and offers a 6-year warranty.

Pros

• Powder-coated aluminum construction
• White chromax aesthetic finish
• Includes two covers for dual towers
• Fits NH-D15 and NH-D15S models
• 6-year manufacturer warranty

Cons

• Only fits specific Noctua dual-tower coolers
• Does not improve thermal performance
• Adds weight to the cooler

Good fit if

• You own a Noctua NH-D15 or NH-D15S
• You want a white aesthetic for your build
• You prefer matching chromax components

Skip if

• You need thermal performance improvements
• You use a single-tower cooler
• You do not own a compatible Noctua cooler

Verdict: Noctua NA-HC4 White Heatsink Cover is a cosmetic upgrade for compatible Noctua dual-tower coolers. It suits users who prioritize a white aesthetic over thermal gains.

5 Best budget

Alphacool 14 x 14mm Copper Heatsinks 10-Pack

Best for: small passive cooling for GPU VRAM

Material

Solid copper

Cooling Method

Passive

Compatible Device

GPU RAM, VRam, voltage converters

Dimensions

14 x 14 mm

Weight

3.84 ounces

View on Amazon: Alphacool 14 x 14mm Copper Heatsinks 10-Pack Affiliate link

You get ten copper passive heatsinks measuring 14 by 14mm each. This pack targets GPU RAM and Mosfets. The material is pure copper for direct heat transfer. The cooling method relies on passive airflow from your case fans. These small blocks fit tight spaces on graphics cards where larger pads do not work.

Pros

• Copper construction for high thermal conductivity
• Compact 14x14mm footprint for tight spaces
• Pack of ten units for multiple components
• Designed specifically for GPU RAM and Mosfets

Cons

• Passive cooling requires existing airflow
• Small surface area limits heat dissipation
• No adhesive included in specifications

Good fit if

• You need to cool VRAM on a dense GPU
• You have limited space around memory chips
• You want copper for better conductivity than aluminum

Skip if

• You need active cooling with a fan
• You require large surface area for high heat loads
• You want pre-applied adhesive for easy installation

Verdict: Alphacool 14mm Copper GPU Heatsinks fit users who need small, passive copper blocks for VRAM. They work well in cases with decent airflow. They are not suitable for high-heat components without forced air.

6 Also great

Awxlumv 300mm Aluminum Passive Heatsink

Best for: passive cooling of power electronics

Material

anodized aluminum

Cooling Method

passive cooling

Compatible Device

computer, Power Transistor, Fet, IC

Dimensions

300mm x 69mm x 36mm

Weight

1.63 pounds

View on Amazon: Awxlumv 300mm Aluminum Passive Heatsink Affiliate link

This is a large passive aluminum heatsink measuring 300 by 69 by 36 millimeters. It features 27 fins with a height of 31.4 millimeters and a base thickness of 4.6 millimeters. The anodized finish provides a sleek silver look. You can use it for power transistors, FETs, ICs, and voltage regulators. It relies on natural convection for cooling without any fans.

Pros

• Large 300mm length provides extensive surface area
• 27 fins increase heat transfer efficiency
• Premium anodized aluminum construction
• 4.6mm thick base board for stability

Cons

• Passive cooling requires strong airflow
• 300mm size may not fit small cases
• No included mounting hardware listed

Good fit if

• You need a large heatsink for power electronics
• You have a case with good passive airflow
• You are cooling high-power components like MOSFETs

Skip if

• You need active fan cooling
• You have limited space under 300mm
• You are cooling a standard CPU directly

Verdict: Awxlumv 300mm Passive Aluminum Heatsink suits builders needing large passive cooling for power components. It fits well in spacious cases with good airflow for transistors and ICs.

7 Best server

ASHATA 1U Passive LGA 2011 Server Heatsink

Best for: 1U Supermicro servers with LGA 2011 CPUs

Socket Compatibility

LGA 2011 (socket R)

Material

Metal

Server Height

1U

Cooling Method

Passive

Compatible Device

Supermicro X9/X10 1U UP and DP servers

Dimensions

0.39 × 0.39 × 0.39 inches

View on Amazon: ASHATA 1U Passive LGA 2011 Server Heatsink Affiliate link

This ASHATA heatsink is a passive cooling solution designed for 1U server chassis. It uses metal fins to dissipate heat without fans. It supports LGA 2011 sockets and fits Supermicro X9 and X10 generation servers. The unit weighs 7.69 ounces. It provides a simple, durable cooling option for specific server builds that require passive thermal management.

Pros

• Passive cooling method requires no fan power
• Compatible with LGA 2011 processor sockets
• Fits 1U server chassis dimensions
• Metal construction for durability

Cons

• Passive design limits cooling capacity under heavy load
• Only supports LGA 2011 socket type
• No fan included for active airflow

Good fit if

• You need a passive cooler for a 1U Supermicro server
• You use an LGA 2011 processor
• You want a simple metal heatsink without fan noise

Skip if

• You require active cooling with a fan
• You use a socket other than LGA 2011
• You need a cooler for a standard desktop PC

Verdict: ASHATA 1U Passive CPU Heatsink for Supermicro is a specialized component for 1U Supermicro servers using LGA 2011 CPUs. It fits your needs only if you require passive cooling for that specific server platform.

Specifications side by side

Frequently asked questions

See also

• thermal grizzly mycro pro RGB alternatives
• oneplus pad 2 alternatives