Radeon HD 3850 vs Radeon HD 3870 X2

Radeon HD 3850
Radeon HD 3870 X2
320 Shaders
512MB GDDR4
668MHz
2x 320 Shaders
2x 512MB GDDR4
825MHz
FP32
0.43 TFLOPS
FP32
1.06 TFLOPS
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Form Factor
PCIe Card
1.0-Slots
Form Factor
PCIe Card
2.0-Slots
TDP
75W
TDP
165W
Power Connectors
1x 6-Pin
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Power Connectors
1x 6-Pin
1x 8-Pin
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GB5 OpenCL - N/A
0%
GB5 OpenCL - N/A
0%
GB5 CUDA - N/A
0%
GB5 CUDA - N/A
0%
GB5 Metal - N/A
0%
GB5 Metal - N/A
0%
GB5 Vulkan - N/A
0%
GB5 Vulkan - N/A
0%
OCT 2020.1 - N/A
0%
OCT 2020.1 - N/A
0%
OCT Metal - N/A
0%
OCT Metal - N/A
0%
Manufacturer
ATI
Manufacturer
ATI
Chip Designer
ATI
Chip Designer
ATI
Architecture
TeraScale 1
Architecture
TeraScale 1
Family
Radeon HD 3000
Family
Radeon HD 3000
Codename
Boom
RV670
Variant
RV670 Pro
Codename
Boom
R680
Variant
R680 XT
Market Segment
Desktop
Market Segment
Desktop
Release Date
11/19/2007
Release Date
1/28/2008
Foundry
TSMC
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Foundry
TSMC
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Fabrication Node
55nm
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Fabrication Node
55nm
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Die Size
192 mm²
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Die Size
2x 192 mm²
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Transistor Count
666 Million
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Transistor Count
2x 666 Million
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Transistor Density
3.47M/mm²
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Transistor Density
3.47M/mm²
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Form
PCIe Card
Form
PCIe Card
Shading Units
320 Shaders
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Shading Units
2x 320 Shaders
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Texture Mapping Units
16 TMUs
Texture Mapping Units
2x 16 TMUs
Render Output Units
16 ROPs
Render Output Units
2x 16 ROPs
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Compute Units
4 CUs
Compute Units
2x 4 CUs
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668MHz
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825MHz
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FP32
0.43 TFLOPS
FP32
1.06 TFLOPS
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FP64
0.09 TFLOPS
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FP64
0.21 TFLOPS
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Pixel Fillrate
10.688 GPixel/s
Pixel Fillrate
13.2 GPixel/s
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Texture Fillrate
10.688 GTexel/s
Texture Fillrate
13.2 GTexel/s
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L1
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Unknown
L1
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Unknown
L2
256KB Shared
L2
256KB Shared
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512MB
GDDR4
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2x 512MB
GDDR4
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Bus Width
256Bit
Bus Width
256Bit
Clock
900MHz
Transfer Rate
1.8GT/s
Bandwidth
57.6GB/s
Clock
1125MHz
Transfer Rate
2.3GT/s
Bandwidth
72GB/s
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TDP
75W
TDP
165W
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1x S-Video
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2x DVI-I Dual-Link
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1x S-Video
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2x DVI-I Dual-Link
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Max Resolution
2560x1600
Max Resolution
2560x1600
Max Resolution Refresh Rate
60Hz
Max Resolution Refresh Rate
60Hz
Variable Refresh Rate
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Variable Refresh Rate
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Display Stream Compression (DSC)
Not Supported
Display Stream Compression (DSC)
Not Supported
Multi Monitor Support
2
Multi Monitor Support
2
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No Encoders
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No Encoders
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Model
UVD 1.0
Model
UVD 1.0
Codec
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VC-1
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AVC (H.264)
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Codec
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VC-1
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AVC (H.264)
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Direct X
10
Direct 3D
10_1
Direct X
10
Direct 3D
10_1
OpenGL
3.3
OpenCL
1.1
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OpenGL
3.3
OpenCL
1.1
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Shader Model
4.1
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GFX
3
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Shader Model
4.1
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GFX
3
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1x Fan
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1x Fan
Power Connectors
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1x 6-Pin
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Power Connectors
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1x 6-Pin
1x 8-Pin
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Slots Required
1.0
PCIe Version
2.0
PCIe Lanes
16
Slots Required
2.0
PCIe Version
2.0
PCIe Lanes
16
Multi GPU Support
Supported
Type
4-way CrossFireX
Multi GPU Support
Supported
Type
2-way CrossFireX
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Change Results