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AMD Radeon HD 6850 X2

AMD Radeon HD 6850 X2 Image AMD Barts Image
The Radeon HD 6850 X2 was a graphics card by AMD, launched in September 2011. Built on the 40 nm process, and based on the Barts graphics processor, in its Barts PRO variant, the card supports DirectX 11.0. The Barts graphics processor is an average sized chip with a die area of 255 mm² and 1,700 million transistors. Unlike the fully unlocked Radeon HD 6870, which uses the same GPU but has all 1120 shaders enabled, AMD has disabled some shading units on the Radeon HD 6850 X2 to reach the product's target shader count. Radeon HD 6850 X2 combines two graphics processors to increase performance. It features 960 shading units, 48 texture mapping units and 32 ROPs per GPU. AMD has placed 4,096 MB GDDR5 memory on the card, which are connected using a 256-bit memory interface per GPU (each GPU manages 2,048 MB). The GPU is operating at a frequency of 800 MHz, memory is running at 1050 MHz.
We recommend the AMD Radeon HD 6850 X2 for gaming with highest details at resolutions up to, and including, 2560x1600.
Being a dual-slot card, the AMD Radeon HD 6850 X2 draws power from 2x 8-pin power connectors, with power draw rated at 254 W maximum. Display outputs include: 2x DVI, 1x HDMI, 1x DisplayPort. Radeon HD 6850 X2 is connected to the rest of the system using a PCIe 2.0 x16 interface.

Graphics Processor

GPU Name: Barts
GPU Variant: Barts PRO
Architecture: TeraScale 2
Process Size: 40 nm
Transistors: 1,700 million
Die Size: 255 mm²

Graphics Card

Released: Sep 19th, 2011
Production Status: End-of-life
Bus Interface: PCIe 2.0 x16

Clock Speeds

GPU Clock: 800 MHz
Memory Clock: 1050 MHz
4200 MHz effective


Memory Size: 2048 MB x2
Memory Type: GDDR5
Memory Bus: 256 bit x2
Bandwidth: 134.4 GB/s x2

Render Config

Shading Units: 960 x2
TMUs: 48 x2
ROPs: 32 x2
Compute Units: 12 x2
Pixel Rate: 25.60 GPixel/s x2
Texture Rate: 38.4 GTexel/s x2
Floating-point performance: 1,536.0 GFLOPS x2

Board Design

Slot Width: Dual-slot
TDP: 254 W
Outputs: 2x DVI
1x DisplayPort
Power Connectors: 2x 8-pin

Graphics Features

DirectX: 11.0
OpenGL: 4.3
OpenCL: 1.2
Shader Model: 5.0


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Our review database contains 105 reviews of the Radeon HD 6850 X2.

Retail boards based on this design

Name GPU Clock Memory Clock Other Changes
ColorFire HD 6850 X2 XStorm 800 MHz 1050 MHz