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PowerColor HD 3870 X2 GDDR4

  • AX3870X21GBD4PH
Graphics Processor
R680 x2
Cores
320 x2
TMUs
16 x2
ROPs
16 x2
Memory Size
512 MB x2
Memory Type
GDDR4
Bus Width
256 bit x2

Graphics Processor

GPU Name
R680
GPU Variant
R680 XT
(215-0708017)
Architecture
TeraScale
Foundry
TSMC
Process Size
55 nm
Transistors
666 million
Die Size
192 mm²

Graphics Card

Release Date
Jan 26th, 2008
Generation
Radeon R600
(HD 3800)
Predecessor
Radeon R500 PCIe
Successor
Radeon R700
Production
End-of-life
Bus Interface
PCIe 2.0 x16

Clock Speeds

GPU Clock
825 MHz
Memory Clock
901 MHz
1125 MHz (+25%)
1802 Mbps effective
2.2 Gbps effective

Memory

Memory Size
512 MB
Memory Type
GDDR3
GDDR4
Memory Bus
256 bit
Bandwidth
57.66 GB/s
72.00 GB/s

Render Config

Shading Units
320
TMUs
16
ROPs
16
Compute Units
4
L2 Cache
256 KB

Theoretical Performance

Pixel Rate
13.20 GPixel/s
Texture Rate
13.20 GTexel/s
FP32 (float) performance
528.0 GFLOPS
FP64 (double) performance
105.6 GFLOPS (1:5)

Board Design

Slot Width
Dual-slot
TDP
165 W
Suggested PSU
450 W
Outputs
2x DVI
1x S-Video

3x DVI
1x HDMI
1x S-Video
Power Connectors
1x 6-pin + 1x 8-pin
2x 6-pin
Board Number
B400

Graphics Features

DirectX
10.1 (10_1)
OpenGL
3.3 (full)
4.0 (partial)
OpenCL
N/A
Vulkan
N/A
Shader Model
4.1

R680 GPU Notes

Graphics/Compute: GFX3
Display Core Engine: 2.0
Unified Video Decoder: 1.0

OpenGL 4.0: 23% Support
OpenGL 4.1: 71% Support
OpenGL 4.2: 16% Support

Other retail boards based on this design (3)

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 Single-slot