ATI Mobility Radeon HD 3870 X2 vs ATI Mobility Radeon HD 3850
ATI Mobility Radeon HD 3870 X2
ATI Mobility Radeon HD 3850
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2x 320 Shaders
1024MB (2x 512MB) GDDR3
660MHz
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320 Shaders
512MB GDDR3
580MHz
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Peak AI Performance
840 GFLOPS
FP32
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Peak AI Performance
370 GFLOPS
FP32
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FP32
840 GFLOPS
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FP32
370 GFLOPS
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Form Factor
MXM-II
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Form Factor
MXM-II
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TDP
110W
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TDP
30W
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Peak AI Performance
|
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Mobility Radeon HD 3870 X2 - 840 GFLOPS FP32
x2.27
Mobility Radeon HD 3850 - 370 GFLOPS FP32
x1
FP32
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Mobility Radeon HD 3870 X2 - 840 GFLOPS FP32
x2.27
Mobility Radeon HD 3850 - 370 GFLOPS FP32
x1
|
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Mobility Radeon HD 3870 X2 - 110W
x3.67
Mobility Radeon HD 3850 - 30W
x1
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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Manufacturer
ATI
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Manufacturer
ATI
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Chip Designer
ATI
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Chip Designer
ATI
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Architecture
TeraScale 1
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Architecture
TeraScale 1
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Family
Radeon HD 3000
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Family
Radeon HD 3000
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Codename
Boom
R680
Variant
M88-LXT
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Codename
Boom
RV670
Variant
M88-L/M88-LP
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Market Segment
Laptop
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Market Segment
Laptop
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Release Date
9/1/2008
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Release Date
6/4/2008
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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
2x 192 mm²
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Die Size
192 mm²
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Transistor Count
2x 666 Million
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Transistor Count
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
MXM-II
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Form
MXM-II
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Shading Units
2x 320 Shaders
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Shading Units
320 Shaders
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Texture Mapping Units
2x 16 TMUs
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Texture Mapping Units
16 TMUs
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Render Output Units
2x 16 ROPs
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Render Output Units
16 ROPs
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-
-
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Compute Units
4 CUs
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660MHz
|
580MHz
|
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Peak AI Performance
840 GFLOPS
FP32
|
Peak AI Performance
370 GFLOPS
FP32
|
|
FP32
840 GFLOPS
|
FP32
370 GFLOPS
|
|
-
-
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FP64
70 GFLOPS
|
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Pixel Fillrate
10.56 GPixel/s
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Pixel Fillrate
9.28 GPixel/s
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Texture Fillrate
10.56 GTexel/s
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Texture Fillrate
9.28 GTexel/s
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L1
Unknown
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L1
Unknown
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L2
256KB Shared
|
L2
256KB Shared
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1024MB (2x 512MB)
GDDR3
|
512MB
GDDR3
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|
Clock
850MHz
Transfer Rate
1.7GT/s
|
Clock
750MHz
Transfer Rate
1.5GT/s
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TDP
110W
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TDP
30W
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Max Resolution
2560x1600
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Max Resolution
2560x1600
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Max Resolution Refresh Rate
60Hz
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Max Resolution Refresh Rate
60Hz
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Variable Refresh Rate
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Variable Refresh Rate
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Display Stream Compression (DSC)
Not Supported
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Display Stream Compression (DSC)
Not Supported
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Multi Monitor Support
2
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Multi Monitor Support
2
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No Encoders
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No Encoders
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Model
UVD 1.0
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Model
UVD 1.0
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Codec
VC-1
AVC (H.264)
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Codec
VC-1
AVC (H.264)
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Direct X
10
Direct 3D
10_1
|
Direct X
10
Direct 3D
10_1
|
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OpenGL
3.3
OpenCL
1.1
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OpenGL
3.3
OpenCL
1.1
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Shader Model
4.1
GFX
3
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Shader Model
4.1
GFX
3
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Not a Card
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Not a Card
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PCIe Version
2.0
PCIe Lanes
16
|
PCIe Version
2.0
PCIe Lanes
16
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