Alphacool
Alphacool Core Geforce RTX 4090 GameRock + Phantom with backplate
Best custom loop upgrade for high-performance graphics card enthusiasts.
Experience superior cooling with the Alphacool Core Geforce RTX 4090 GameRock + Phantom water block. Crafted with a single-piece copper cooler and terminal, it features a hard, chrome-plated finish for durability and aesthetics. Integrated digitally addressable RGB lighting enhances your build's visual appeal. The redesigned jet plate, optimized fin structure, and improved water flow ensure maximum heat dissipation. High-performance thermal pads provide excellent contact, while the matching aluminum backplate adds a clean, cohesive look. This water block is designed for custom loop cooling setups.
$183.95
Owner Satisfaction
4.6
/ 5
Category Rank
632
/ 3605
#632 in Computer System Cooling Parts
Price vs Category Average
+22%
Above average
Model Number
13474
/ AC-
Who it's for
- Overclockers seeking maximum performance and lower operating temperatures
- System builders prioritizing premium aesthetics and structural integrity
- Compact PC enthusiasts needing to reclaim valuable internal space
Who should skip it
- Users uncomfortable with voiding warranties or risking hardware damage
- Budget-conscious builders avoiding expensive custom liquid cooling loops
- Owners of RTX 4090 cards from other manufacturers
Performance breakdown
Thermal Dissipation Efficiency
Optimized fin structure ensures peak heat transfer for high-wattage GPU loads.
Build Material Quality
Solid copper construction with chrome plating offers exceptional durability and longevity.
Flow Rate Optimization
Redesigned jet plate minimizes resistance for consistent, high-volume coolant circulation.
Aesthetic Integration
Addressable RGB and sleek backplate provide a clean, professional visual finish.
Installation Complexity
Requires custom loop expertise but rewards users with superior thermal headroom.
Thermal Interface Contact
High-performance pads ensure reliable heat transfer across critical board components.
Key Specs
Model Number
AC-13474
Material
Copper
Cooling Type
Custom Loop Component
Cooling Method
Water Cooling
Compatibility
Gainward GeForce RTX 4090 Phantom GS, Gainward GeForce RTX 4090 Phantom, Palit
Thermal Pad Performance
Up to 7 W/mK
Lighting
Digitally addressable RGB LEDs
Features
- Single-piece copper cooler and terminal
- Durable chrome plating
- Addressable RGB lighting
- Optimized cooling performance
- Enhanced water flow design
- Includes aluminum backplate
- High-performance thermal pads
- Designed for RTX 4090 GameRock/Phantom
What customers say
Enthusiasts overwhelmingly praise the Alphacool Core RTX 4090 water block for its exceptional thermal performance and superior design. Users report significant temperature drops, enabling the GPU to sustain higher boost clocks while operating quietly. The full-cover engineering effectively cools the core, VRMs, and VRAM, reflecting high quality. Aesthetically, the robust acrylic construction and integrated RGB lighting greatly enhance the visual appeal of custom builds. While installation is involved, the resulting thermal headroom and premium build quality justify the investment for high-end cooling solutions. The consensus is that this block delivers excellent value within the enthusiast market.
Know before you buy
This block is specifically engineered for the Gainward GeForce RTX 4090 Phantom and Phantom GS, as well as the Palit GeForce RTX 4090 GameRock series. It will not fit reference designs or other custom PCB layouts, so please verify your card's model number before purchasing.
Yes, the package includes the water block, the matching aluminum backplate, and high-performance thermal pads. You will need to provide your own custom loop components, such as fittings, tubing, a pump, and a radiator, to complete the cooling system.
The chrome plating provides a durable, corrosion-resistant finish that protects the copper from oxidation. While it is highly resilient, you should still use a high-quality coolant with anti-corrosive properties to ensure the longevity of your entire custom loop.
Yes, the block features digitally addressable RGB LEDs that use a standard 3-pin 5V header. This allows you to sync the lighting effects directly with your motherboard’s software, such as ASUS Aura Sync, MSI Mystic Light, or Gigabyte RGB Fusion.
The redesigned internal layout optimizes water flow directly over the GPU core and critical components. This increased surface area and improved flow path significantly enhance heat dissipation compared to stock air cooling, allowing for more stable performance under heavy loads.
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$184