Watercool
Watercool HEATKILLER GPU-X² 6850
Best liquid cooling upgrade for ATI Radeon HD6850 reference card owners.
The Heatkiller GPU-X³ 6850 Full Coverage Water Block features a unique, flat design for optimal cooling performance. Constructed from high-grade copper, it effectively cools the graphics processor, VRAM, and voltage regulators. The integrated micro-structure and precise thermal pads ensure efficient heat dissipation and easy installation. Large volume channels minimize flow resistance and weight, while dual-sided terminals offer flexible integration into your cooling loop. This water block is designed for the ATI Radeon HD6850 reference design.
$35.95
Owner Satisfaction
4.7
/ 5
Category Rank
152
/ 3597
#152 in Computer System Cooling Parts
Price vs Category Average
-76%
Below average
Material
Electrolytic copper, stainless steel, POM
/ Electrolytic copper, stainless steel, POM
Who it's for
- Overclockers seeking maximum thermal headroom and stable performance
- System builders prioritizing long-term durability and premium materials
- Enthusiasts managing complex loops with multiple cooling blocks
Who should skip it
- Owners of modern graphics cards seeking current hardware compatibility
- Budget-conscious users looking for cost-effective cooling solutions
- Users preferring low-maintenance, plug-and-play cooling setups
Performance breakdown
Thermal conductivity
High-grade copper construction ensures rapid heat transfer away from critical components.
Flow efficiency
Large volume channels minimize resistance for a smoother, more efficient loop.
Coverage depth
Full-block design protects the GPU, VRAM, and voltage regulators simultaneously.
Installation ease
Pre-cut thermal pads simplify the mounting process for most enthusiasts.
Loop flexibility
Dual-sided terminals allow for versatile integration into complex cooling setups.
Build integrity
Robust materials and pressure-tested seals provide long-term operational reliability.
Key Specs
Material
Electrolytic copper, stainless steel, POM
Dimensions
130.0 x 116.0 x 11.5 mm
Weight
650g
Connection
4x G ¼ in. (DIN ISO 228-1)
Tested pressure
5 bar
Compatible with
ATI Radeon HD6850 (Reference Design)
Included
1x KILLER HEAT ® GPU-X ³ 6850, 1x mounting hardware / instructions
Features
- Full coverage design for comprehensive cooling
- High-grade copper construction for superior heat transfer
- Cools GPU, VRAM, and voltage regulators
- Fine micro-structure for optimized cooling performance
- Pre-cut thermal pads for easy installation
- Large volume channels for low flow resistance
- Flexible integration with dual-sided terminals
What customers say
Enthusiasts highly value the Watercool HEATKILLER GPU-X² 6850 for its superior thermal performance, enabling significant temperature reductions crucial for overclocking. Build quality receives consistent praise; the combination of a high purity copper base and durable stainless steel top offers both longevity and a premium industrial look. While the initial cost is high, users view this as a sound investment due to the component's flawless reliability over time. Installation is generally straightforward thanks to precise manufacturing. Overall satisfaction remains very high among serious builders prioritizing top tier performance and lasting quality.
Know before you buy
This block is specifically designed for the ATI Radeon HD6850 reference design. It will not fit custom PCB layouts, so please verify your card's design before purchasing.
As a full-coverage block, it provides direct cooling for the GPU core, the VRAM modules, and the voltage regulator modules (VRMs) to ensure comprehensive thermal management.
Yes, the package includes the water block, pre-cut thermal pads, and the necessary mounting hardware. You will only need to provide your own fittings and tubing to integrate it into your loop.
The block features large-volume internal channels specifically engineered to minimize flow resistance, ensuring it won't significantly impact your loop's overall performance.
The block is equipped with four G 1/4 inch ports, which is the industry standard for custom water cooling. This allows you to use a wide variety of compatible fittings and provides flexibility for your loop's routing.
The block weighs 650g. While this is a solid weight, the mounting hardware is designed to distribute this load evenly, provided your graphics card is properly secured in your PC case.
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$36