Mobility Radeon HD 4870 X2 vs Radeon HD 6770M Mac MXM

Mobility Radeon HD 4870 X2
Radeon HD 6770M Mac MXM
2x 800 Shaders
2x 1GB GDDR5
550MHz
480 Shaders
512MB GDDR5
675MHz
FP32
1.76 TFLOPS
FP32
0.65 TFLOPS
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Form Factor
MXM-A
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Form Factor
MXM-A
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TDP
Unknown
TDP
35W
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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
AMD
Chip Designer
ATI
Chip Designer
AMD
Architecture
TeraScale 1
Architecture
TeraScale 2
Family
Radeon HD 4000
Family
Radeon HD 6000
Codename
Wekiva
RV770
Variant
M98 XT
Codename
Turks
RV930
Variant
Whistler XT
Market Segment
Laptop
Market Segment
Laptop
Release Date
1/9/2009
Release Date
1/4/2011
Foundry
TSMC
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Foundry
TSMC
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Fabrication Node
55nm
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Fabrication Node
40nm
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Die Size
2x 256 mm²
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Die Size
118 mm²
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Transistor Count
2x 956 Million
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Transistor Count
716 Million
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Transistor Density
3.73M/mm²
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Transistor Density
6.07M/mm²
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Form
MXM-A
Form
MXM-A
Shading Units
2x 800 Shaders
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Shading Units
480 Shaders
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Texture Mapping Units
2x 40 TMUs
Texture Mapping Units
24 TMUs
Render Output Units
2x 16 ROPs
Render Output Units
8 ROPs
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Compute Units
2x 10 CUs
Compute Units
6 CUs
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550MHz
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675MHz
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FP32
1.76 TFLOPS
FP32
0.65 TFLOPS
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FP64
0.35 TFLOPS
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Pixel Fillrate
8.8 GPixel/s
Pixel Fillrate
5.4 GPixel/s
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Texture Fillrate
22 GTexel/s
Texture Fillrate
16.2 GTexel/s
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L1
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16KB/CU
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L1
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8KB/CU
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L2
256KB Shared
L2
256KB Shared
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2x 1GB
GDDR5
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512MB
GDDR5
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Bus Width
256Bit
Bus Width
128Bit
Clock
700MHz
Transfer Rate
2.8GT/s
Bandwidth
89.6GB/s
Clock
794MHz
Transfer Rate
3.2GT/s
Bandwidth
50.8GB/s
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TDP
Unknown
TDP
35W
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No Ports
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No Ports
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 2.0
Model
UVD 3.0
Codec
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VC-1
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AVC (H.264)
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Codec
MPEG-1
MPEG-2
MPEG-4
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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
11
Direct 3D
11_0
OpenGL
3.3
OpenCL
1.1
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OpenGL
4.5
OpenCL
1.2
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Shader Model
4.1
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GFX
3
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Shader Model
5.0
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GFX
4
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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
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PCIe Version
2.1
PCIe Lanes
16
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Change Results