ATI Mobility Radeon HD 4870 X2 vs AMD Radeon HD 6770M Mac MXM
ATI Mobility Radeon HD 4870 X2
AMD Radeon HD 6770M Mac MXM
|
2x 800 Shaders
2x 1GB GDDR5
550MHz
|
480 Shaders
512MB GDDR5
675MHz
|
|
Peak Performance
1.76 TFLOPS
FP32
|
Peak Performance
0.65 TFLOPS
FP32
|
|
FP32
1.76 TFLOPS
|
FP32
0.65 TFLOPS
|
|
-
-
|
-
-
|
|
Form Factor
MXM-A
-
|
Form Factor
MXM-A
-
|
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TDP
Unknown
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TDP
35W
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|
-
-
-
-
-
|
-
-
-
-
-
|
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GB6 OpenCL N/A
0%
|
GB6 OpenCL N/A
0%
|
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GB6 Metal N/A
0%
|
GB6 Metal N/A
0%
|
|
GB6 Vulkan N/A
0%
|
GB6 Vulkan N/A
0%
|
|
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
-
|
Foundry
TSMC
-
|
|
Fabrication Node
55nm
-
|
Fabrication Node
40nm
-
|
|
Die Size
2x 256 mm²
-
|
Die Size
118 mm²
-
|
|
Transistor Count
2x 956 Million
-
|
Transistor Count
716 Million
-
|
|
Transistor Density
3.73M/mm²
-
|
Transistor Density
6.07M/mm²
-
|
|
Form
MXM-A
|
Form
MXM-A
|
|
Shading Units
2x 800 Shaders
-
|
Shading Units
480 Shaders
-
|
|
Texture Mapping Units
2x 40 TMUs
|
Texture Mapping Units
24 TMUs
|
|
Render Output Units
2x 16 ROPs
|
Render Output Units
8 ROPs
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
Compute Units
2x 10 CUs
|
Compute Units
6 CUs
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
-
-
-
550MHz
|
-
-
-
675MHz
|
|
Peak Performance
1.76 TFLOPS
FP32
|
Peak Performance
0.65 TFLOPS
FP32
|
|
-
-
-
|
-
-
-
|
|
-
-
-
-
-
-
|
-
-
-
-
-
-
|
|
-
-
-
-
-
-
|
-
-
-
-
-
-
|
|
FP32
1.76 TFLOPS
-
-
|
FP32
0.65 TFLOPS
-
-
|
|
FP64
0.35 TFLOPS
-
|
-
-
-
|
|
-
-
-
-
|
-
-
-
-
|
|
-
-
-
|
-
-
-
|
|
-
-
-
|
-
-
-
|
|
-
-
-
-
|
-
-
-
-
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
Pixel Fillrate
8.8 GPixel/s
|
Pixel Fillrate
5.4 GPixel/s
|
|
-
-
|
-
-
|
|
Texture Fillrate
22 GTexel/s
|
Texture Fillrate
16.2 GTexel/s
|
|
-
-
|
-
-
|
|
L1
-
-
16KB/CU
-
|
L1
-
-
8KB/CU
-
|
|
L2
256KB Shared
|
L2
256KB Shared
|
|
-
-
-
|
-
-
-
|
|
2x 1GB
GDDR5
-
|
512MB
GDDR5
-
|
|
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
|
|
-
-
-
-
-
-
-
-
-
|
-
-
-
-
-
-
-
-
-
|
|
TDP
Unknown
|
TDP
35W
|
|
-
-
|
-
-
|
|
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
No Ports
|
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
No Ports
|
|
Max Resolution
2560x1600
|
Max Resolution
2560x1600
|
|
Max Resolution Refresh Rate
60Hz
|
Max Resolution Refresh Rate
60Hz
|
|
Variable Refresh Rate
-
-
-
|
Variable Refresh Rate
-
-
-
|
|
Display Stream Compression (DSC)
Not Supported
|
Display Stream Compression (DSC)
Not Supported
|
|
Multi Monitor Support
2
|
Multi Monitor Support
2
|
|
-
-
|
-
-
|
|
No Encoders
-
|
No Encoders
-
|
|
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
|
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
|
|
Model
UVD 2.0
|
Model
UVD 3.0
|
|
Codec
-
-
-
-
VC-1
-
-
-
AVC (H.264)
-
-
-
-
-
|
Codec
MPEG-1
MPEG-2
MPEG-4
-
VC-1
-
-
-
AVC (H.264)
-
-
-
-
-
|
|
Direct X
10
Direct 3D
10_1
|
Direct X
11
Direct 3D
11_0
|
|
OpenGL
3.3
OpenCL
1.1
-
-
|
OpenGL
4.5
OpenCL
1.2
-
-
|
|
Shader Model
4.1
-
-
GFX
3
-
-
-
-
|
Shader Model
5.0
-
-
GFX
4
-
-
-
-
|
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Not a Card
-
-
-
|
Not a Card
-
-
-
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-
-
-
-
-
-
-
-
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-
-
-
-
-
-
-
-
|
|
-
-
PCIe Version
2.0
PCIe Lanes
16
|
-
-
PCIe Version
2.1
PCIe Lanes
16
|
|
-
-
-
-
|
-
-
-
-
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-
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-
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-
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