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Sapphire HD 3870 X2 ATOMIC

Graphics Processor
320 x2
16 x2
16 x2
512 MB x2
Memory Size
Memory Type
256 bit x2
Bus Width
Sapphire HD 3870 X2 ATOMIC Image ATI R680 Image

Graphics Processor

GPU Name: R680
Architecture: TeraScale
Process Size: 55 nm
Transistors: 666 million
Die Size: 192 mm²

Graphics Card

Released: Jan 26th, 2008
Jul 11th, 2008
Production Status: End-of-life
Bus Interface: PCIe 2.0 x16

Clock Speeds

GPU Clock: 825 MHz
860 MHz (+4%)
Memory Clock: 901 MHz
931 MHz (+3%)
1802 MHz effective
1862 MHz effective


Memory Size: 512 MB x2
Memory Type: GDDR3
Memory Bus: 256 bit x2
Bandwidth: 57.7 GB/s x2
59.6 GB/s x2

Render Config

Shading Units: 320 x2
TMUs: 16 x2
ROPs: 16 x2
Compute Units: 4 x2
Pixel Rate: 13.20 GPixel/s x2
13.76 GPixel/s x2
Texture Rate: 13.20 GTexel/s x2
13.76 GTexel/s x2
Floating-point performance: 528.0 GFLOPS x2
550.4 GFLOPS x2

Board Design

Slot Width: Dual-slot
Length: 10.5 inches
10.63 inches
267 mm
270 mm
TDP: 165 W
Outputs: 2x DVI
1x S-Video
Power Connectors: 1x 6-pin + 1x 8-pin
Board Number: B400

Graphics Features

DirectX: 10.1
OpenGL: 3.3
OpenCL: 1.0
Shader Model: 4.1


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Our review database contains 72 reviews of the HD 3870 X2 ATOMIC.

Other retail boards based on this design

Name GPU Clock Memory Clock Other Changes
ASUS ROG HD 3870 X2 TOP 851 MHz 954 MHz 4x DVI 1x S-Video
PowerColor HD 3870 X2 GDDR4 825 MHz 1125 MHz GDDR4, 3x DVI 1x HDMI 1x S-Video
Sapphire HD 3870 X2 ATOMIC 860 MHz 931 MHz 10.63 inches, Single-slot