Alphacool Aurora Acryl X4 D-RAM Alternatives: 6 Similar Picks Compared

Comparing alternatives to the X4 block

Watercool HEATKILLER IV PRO Acrylic AMD Water Block

The Watercool HEATKILLER IV PRO targets AMD processors instead of RAM modules. It features a high-flow jet design for dedicated CPU cooling rather than memory heat dissipation. The block weighs 10.9 ounces and measures 4.33 by 5.51 inches, making it significantly larger than the compact 5.28-ounce RAM block. It supports AM4 and AM5 sockets and uses an acrylic top with a copper base. You should choose this if you need processor cooling for AMD systems. It does not offer digital RGB lighting like the original. This option suits builders seeking component-level CPU liquid cooling with large fittings rather than direct RAM coverage. It serves a different primary function within the loop.

Alphacool Eisball D5 Reservoir and Pump Top

The Alphacool Eisball D5 Reservoir provides a 700 ml liquid volume for standalone D5 pumps. It features digital RGB illumination similar to the original RAM block but serves as a reservoir solution. The unit weighs 1.42 pounds and measures 5.04 by 4.63 inches, offering a much larger footprint than the small RAM cooler. It uses acrylic and plexi materials. You should pick this if you need a lighted D5 reservoir for custom loops. It does not cool memory chips directly. This component expands your loop capacity and visibility. It matches the lighting style but fulfills a distinct role for pump integration rather than component-specific thermal management.

Alphacool Eisblock Aurora Acryl RTX 4090 GPU Block

The Alphacool Eisblock Aurora RTX 4090 Water Block targets reference GeForce RTX 4090 graphics cards. It uses an acrylic build with a revised jet plate and bundled backplate. The block weighs 2.2 pounds and measures 19.7 inches in width, making it vastly larger than the RAM block. It features ARGB lighting. You should choose this if you need cooling for a high-end graphics card in a custom loop. It does not fit memory modules. This option provides GPU thermal management rather than memory coverage. It suits builders focusing on graphics processor cooling with specific reference board compatibility. The scale and function differ entirely from the compact memory solution.

Alphacool NexXxos 240mm Full Copper Radiator

The Alphacool NexXxos 240mm Full Copper Radiator provides six G1/4-inch ports and an all-copper core. It supports dual 120mm fan mounts for expanded cooling capacity. The unit weighs 1.32 pounds and measures 11 by 4.88 inches. It lacks digital RGB lighting and acrylic tops found in the original. You should pick this if you need a dual-fan radiator for custom loops. It does not cool RAM or CPUs directly. This component dissipates heat from the loop fluid rather than specific components. It offers multiple port options for tubing connections. The copper construction provides broad thermal exchange without the aesthetic lighting features of the memory block.

Alphacool NexXxos UT60 120mm Copper Radiator

The Alphacool NexXxos UT60 120mm Copper Radiator is a compact, copper-core unit for tight space constraints. It fits a single 120mm fan mount with G1/4-inch ports. The block weighs 1.76 pounds and measures 4.72 inches square. It lacks digital RGB lighting and acrylic materials. You should choose this if you need a single-fan radiator for small cases. It does not provide component-specific cooling like the RAM block. This option offers heat dissipation in restricted environments. It suits builders needing basic copper-core radiating capabilities. The design prioritizes space efficiency and thermal exchange over aesthetic integration or direct component contact.

Alphacool NexXxoS ST30 280mm Copper Radiator

The Alphacool NexXxoS ST30 280mm Copper Radiator delivers full copper construction in a low-profile 1.18-inch frame. It provides a broad 280mm cooling area for slim dual-140mm setups. The unit weighs 0.86 kilograms and measures 12.6 inches long. It lacks digital RGB lighting and acrylic tops. You should pick this if you need a slim radiator for compact cases. It does not cool memory modules directly. This component expands loop cooling capacity without causing clearance issues. The copper core offers efficient heat dissipation. It serves as a passive thermal exchange element rather than an active component cooler with lighting features.

Quick picks

Our 7 picks

1 Best overall

Alphacool Aurora Acryl X4 RAM Water Block

Best for: custom loops needing dedicated memory cooling

Lighting

ARGB

Material

Nickel-plated copper

Dimensions

6.3 × 2.76 × 1.57 inches

Weight

5.28 ounces

View on Amazon: Alphacool Aurora Acryl X4 RAM Water Block

This RAM water block cools memory modules inside a custom liquid loop. You get a nickel-plated copper base measuring 4 mm thick, an acrylic top, and embedded digital RGB illumination. The body measures 128 x 45 x 19 mm to fit four memory modules alongside dedicated Alphacool heatsinks. It suits you if you need direct liquid cooling and addressable lighting for your system memory setup.

Pros

• Nickel-plated 4 mm thick copper cold plate
• Flush-mounted addressable digital RGB LED strip
• Compact 128 x 45 x 19 mm acrylic block footprint
• Direct compatibility with Alphacool D-RAM heatsink modules

Cons

• Requires separate Alphacool D-RAM module plates to mount to memory
• Limited to custom loop setups with compatible liquid fittings

Good fit if

• You build an open loop and need targeted memory cooling.
• You use or plan to buy Alphacool D-RAM module plates.
• You want addressable digital RGB lighting embedded in the memory block.

Skip if

• You run standard stock memory spreaders without modular Alphacool heatsinks.
• You use an all-in-one closed liquid cooler without custom tubing.

Verdict: Alphacool Aurora Acryl X4 D-RAM Water Block delivers direct liquid memory cooling using a 4 mm nickel-plated copper base. It provides seamless illumination and fitment for builds using Alphacool RAM module plates.

2 Best premium

Watercool HEATKILLER IV PRO Acrylic AMD Water Block

Best for: AMD CPU loops using large fittings

Material

Copper

Socket Compatibility

AM4, AM5

Dimensions

5.51 × 4.33 × 1.97 inches

Weight

10.9 ounces

View on Amazon: Watercool HEATKILLER IV PRO Acrylic AMD Water Block

The Watercool HEATKILLER IV PRO is an acrylic-top CPU water block built for AMD platforms including socket AM4 and AM5. It features an integrated jet structure rather than a separate jet plate, providing high flow with support for large 16/10 and 19/13 fittings. If you need a dedicated copper-base cooler focused strictly on processor thermal management rather than memory modules, this fits your custom loop.

Pros

• Integrated jet structure eliminates the separate jet plate
• Broad AMD compatibility spanning socket AM4, AM5, and legacy mounts
• Supports large 16/10 and 19/13 liquid cooling fittings
• Constructed with acrylic housing and copper base

Cons

• Cools CPU sockets only with no direct memory block functionality
• Lacks mounting hardware for Intel motherboard sockets

Good fit if

• You are cooling an AMD build on socket AM4 or AM5.
• You run large 16/10 or 19/13 tubing fittings in your loop.

Skip if

• You need a dedicated liquid block for D-RAM modules.
• You are building on an Intel processor platform.

Verdict: Watercool HEATKILLER IV PRO AMD CPU Block delivers dedicated processor liquid cooling with an integrated high-flow jet design. It suits builders seeking component-level CPU cooling rather than direct RAM coverage.

3 Best digital rgb

Alphacool Eisball D5 Reservoir and Pump Top

Best for: custom loops needing a lighted D5 reservoir

Lighting

Digital RGB

Material

Transparent nylon

Reservoir Capacity

700 ml

Pump Compatibility

D5

Dimensions

4.63 × 5.04 × 5.04 inches

Weight

1.42 pounds

View on Amazon: Alphacool Eisball D5 Reservoir and Pump Top

The Alphacool Eisball is a spherical reservoir and integrated D5 pump top made with transparent nylon and an acetal pump holder. It offers a 700 ml fluid capacity and built-in digital RGB lighting. It measures 117.51 by 128 by 128 mm. If you need a combined reservoir and pump housing with addressable lighting to expand your custom loop beyond component blocks, this unit fits your build.

Pros

• 700 ml fluid reservoir capacity
• Integrated digital RGB lighting
• Compatible with D5 pumps
• Constructed from transparent nylon with an acetal base

Cons

• D5 pump is not included
• Spherical 128 mm profile requires significant case clearance

Good fit if

• You want a 700 ml reservoir with built-in digital RGB lighting.
• You already have or plan to purchase a separate D5 pump.

Skip if

• You need an included pump mechanism in the package.
• You need a direct-contact memory cooling block instead of a reservoir.

Verdict: Alphacool Eisball D5 Digital RGB Reservoir provides a 700 ml liquid volume and digital RGB illumination for setups using standalone D5 pumps. It serves as a specialized reservoir solution rather than a direct RAM cooling block.

4 Best budget

Alphacool Eisblock Aurora Acryl RTX 4090 GPU Block

Best for: reference GeForce RTX 4090 custom loops

Lighting

12 digital aRGB LEDs, 5V

Material

Chrome-plated copper, acrylic, aluminum

Thread Size

G1/4

Dimensions

19.7 × 19.7 × 11 inches

Weight

2.2 pounds

View on Amazon: Alphacool Eisblock Aurora Acryl RTX 4090 GPU Block

The Alphacool Eisblock Aurora RTX 4090 Water Block cools reference GeForce RTX 4090 graphics cards using an acrylic housing and included backplate. It features integrated ARGB lighting, a modified jet plate with an improved inflow engine, and an expanded cooling fin structure. Weighing 2.2 pounds, this GPU block fits custom liquid loops targeting GPU core and memory heat rather than system RAM.

Pros

• Includes matching backplate
• Integrated ARGB illumination
• Modified jet plate with improved inflow engine
• Clear acrylic housing

Cons

• Cools reference RTX 4090 GPUs instead of RAM modules
• No compatibility listed for non-reference boards

Good fit if

• You run a reference layout GeForce RTX 4090 graphics card.
• You want a clear acrylic block with built-in ARGB and backplate included.

Skip if

• You specifically require liquid cooling for motherboard memory modules.
• You own a non-reference custom PCB graphics card.

Verdict: Alphacool Eisblock Aurora RTX 4090 Water Block targets reference 4090 graphics cards with an acrylic build, revised jet plate, and bundled backplate.

5 Best dual fan

Alphacool NexXxos 240mm Full Copper Radiator

Best for: dual-fan loops needing multiple port options

Radiator Size

240mm

Material

Copper

Thread Size

G1/4"

Fan Mount

Dual Fan

Dimensions

4.88 × 11 × 1.81 inches

Weight

1.32 pounds

View on Amazon: Alphacool NexXxos 240mm Full Copper Radiator

If you need heat dissipation for a custom loop, this 240mm radiator supports two 120mm fans across its 46mm-thick frame. It features all-copper cooling channels, fins, and chambers paired with brass G1/4-inch threads across six ports. This gives you multiple routing options when linking memory or processor blocks. Its 280mm overall length and 46mm thickness make it suitable for cases with medium-depth dual-fan radiator mounts.

Pros

• Six G1/4-inch ports for flexible loop routing
• Copper cooling fins, channels, and water chambers
• Supports two 120mm cooling fans
• Solid steel side panels with brass thread inserts

Cons

• 46mm thickness requires more clearance than slim radiators
• Weighs 1,199g before adding fluid and fans

Good fit if

• You need a 240mm radiator that offers six inlet and outlet port locations.
• You have clearance in your chassis for a 46mm radiator plus standard fan depth.

Skip if

• You require a slim 30mm radiator to fit inside a tight case.
• You build around 140mm fan mounts rather than 120mm configurations.

Verdict: Alphacool NexXxos 240mm Full Copper Radiator provides six G1/4-inch ports and an all-copper core to expand custom loop cooling across two 120mm fan mounts.

6 Best single fan

Alphacool NexXxos UT60 120mm Copper Radiator

Best for: Small cases with one 120mm fan slot

Radiator Size

120mm

Material

Copper, brass, steel

Thread Size

G1/4"

Fan Mount

Single Fan

Dimensions

4.72 × 4.72 × 2.76 inches

Weight

1.76 pounds

View on Amazon: Alphacool NexXxos UT60 120mm Copper Radiator

This is a 120mm single-fan radiator with a black exterior. It features a full copper core with brass G1/4" ports and steel side panels. The dimensions are 157 x 124 x 60mm, and it weighs 1,004g. You need this for tight cases where space is limited. It suits builds that require a compact cooling solution without sacrificing copper construction quality.

Pros

• Full copper core and fins for efficient heat transfer
• Six G1/4" ports for flexible tubing connections
• Compact 120mm size fits small form factor cases
• Black exterior matches modern aesthetic themes

Cons

• Single fan configuration limits total airflow
• Steel side panels may reduce total surface area compared to all-copper designs
• Heavier than plastic alternatives at over 1kg

Good fit if

• You have a small case with only one 120mm fan mount available
• You need G1/4" fittings for custom loop plumbing
• You prefer a black finish for your build

Skip if

• You require dual or triple fan configurations for higher cooling capacity
• You need a 240mm or larger radiator for high-TDP CPUs
• You are building a large tower case with ample space

Verdict: Alphacool NexXxos UT60 120mm Single Fan is a compact, copper-core radiator for users with tight space constraints. It fits builders who need a single 120mm mount with G1/4" ports.

7 Also great

Alphacool NexXxoS ST30 280mm Copper Radiator

Best for: slim dual-140mm liquid cooling setups needing copper

Radiator Size

280mm

Material

Copper

Thread Size

G1/4

Dimensions

12.6 × 5.67 × 1.18 inches

Weight

0.86 kilograms

View on Amazon: Alphacool NexXxoS ST30 280mm Copper Radiator

This component is a 280mm custom loop radiator built with full copper material and finished in black. With a slim 1.18-inch profile and an overall length of 12.6 inches, it offers substantial surface area while remaining easy to clear in tighter chassis. You get dual 140mm fan mounting capability in a 0.86-kilogram package, making it suitable if you need broad cooling capacity without the bulk of thicker radiator designs.

Pros

• Full copper construction
• Slim 1.18-inch profile fits restricted spaces
• 280mm frame supports dual 140mm fan setups
• Lightweight build at 0.86 kilograms

Cons

• Slim 1.18-inch depth holds less fluid volume than 1.57-inch or 1.97-inch versions
• Single black color option with no built-in lighting

Good fit if

• You have chassis mounts sized for a 280mm radiator.
• You need a 1.18-inch profile to clear motherboard heatsinks and memory.
• You want full copper construction in your cooling loop.

Skip if

• You need a thicker 1.57-inch or 1.97-inch core for greater thermal mass.
• You are restricted to cases that only support 120mm-based fan widths.

Verdict: Alphacool NexXxoS Full Copper 280mm Radiator delivers full copper construction in a low-profile 1.18-inch frame. It provides broad 280mm cooling area without causing clearance problems inside compact cases.

Specifications side by side

Frequently asked questions

See also

• orange pi 6 plus 32gb RAM alternatives
• best heatsinks for RAM