Radeon HD 4870 Mac vs Radeon HD 4870 X2
Radeon HD 4870 Mac
Radeon HD 4870 X2
|
800 Shaders
512MB GDDR5
750MHz
|
2x 800 Shaders
2x 1GB GDDR5
750MHz
|
|
FP32
1.2 TFLOPS
|
FP32
2.4 TFLOPS
|
|
-
-
|
-
-
|
|
Form Factor
PCIe Card
2.0-Slots
|
Form Factor
PCIe Card
2.0-Slots
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TDP
150W
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TDP
286W
|
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Power Connectors
2x 6-Pin
-
-
-
|
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%
|
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Manufacturer
ATI
|
Manufacturer
ATI
|
|
Chip Designer
ATI
|
Chip Designer
ATI
|
|
Architecture
TeraScale 1
|
Architecture
TeraScale 1
|
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Family
Radeon HD 4000
|
Family
Radeon HD 4000
|
|
Codename
Wekiva
RV770
Variant
RV770 XT
|
Codename
Wekiva
RV770
Variant
RV770 XT
|
|
Market Segment
Desktop
|
Market Segment
Desktop
|
|
Release Date
6/25/2008
|
Release Date
8/12/2008
|
|
Foundry
TSMC
-
|
Foundry
TSMC
-
|
|
Fabrication Node
55nm
-
|
Fabrication Node
55nm
-
|
|
Die Size
256 mm²
-
|
Die Size
2x 256 mm²
-
|
|
Transistor Count
956 Million
-
|
Transistor Count
2x 956 Million
-
|
|
Transistor Density
3.73M/mm²
-
|
Transistor Density
3.73M/mm²
-
|
|
Form
PCIe Card
|
Form
PCIe Card
|
|
Shading Units
800 Shaders
-
|
Shading Units
2x 800 Shaders
-
|
|
Texture Mapping Units
40 TMUs
|
Texture Mapping Units
2x 40 TMUs
|
|
Render Output Units
16 ROPs
|
Render Output Units
2x 16 ROPs
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
Compute Units
10 CUs
|
Compute Units
2x 10 CUs
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
-
-
-
750MHz
|
-
-
-
750MHz
|
|
-
-
|
-
-
|
|
-
-
-
|
-
-
-
|
|
-
-
-
|
-
-
-
|
|
-
-
-
|
-
-
-
|
|
FP32
1.2 TFLOPS
|
FP32
2.4 TFLOPS
|
|
-
-
|
-
-
|
|
FP64
0.24 TFLOPS
-
|
FP64
0.48 TFLOPS
-
|
|
-
-
|
-
-
|
|
-
-
-
|
-
-
-
|
|
Pixel Fillrate
12 GPixel/s
|
Pixel Fillrate
12 GPixel/s
|
|
-
-
|
-
-
|
|
Texture Fillrate
30 GTexel/s
|
Texture Fillrate
30 GTexel/s
|
|
-
-
|
-
-
|
|
L1
-
-
16KB/CU
-
|
L1
-
-
16KB/CU
-
|
|
L2
256KB Shared
|
L2
256KB Shared
|
|
-
-
-
|
-
-
-
|
|
512MB
GDDR5
-
|
2x 1GB
GDDR5
-
|
|
Bus Width
256Bit
|
Bus Width
256Bit
|
|
Clock
850MHz
Transfer Rate
3.4GT/s
Bandwidth
108.8GB/s
|
Clock
900MHz
Transfer Rate
3.6GT/s
Bandwidth
115.2GB/s
|
|
-
-
-
-
-
-
-
-
-
|
-
-
-
-
-
-
-
-
-
|
|
TDP
150W
|
TDP
286W
|
|
-
-
|
-
-
|
|
-
-
-
-
-
-
-
-
1x DVI-I Dual-Link
-
-
-
-
1x mini-DisplayPort 1.0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
|
-
1x S-Video
-
-
-
-
-
-
2x DVI-I Dual-Link
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
|
|
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
-
|
|
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
|
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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Model
UVD 2.0
|
Model
UVD 2.0
|
|
Codec
-
-
-
-
VC-1
-
-
-
AVC (H.264)
-
-
-
-
-
|
Codec
-
-
-
-
VC-1
-
-
-
AVC (H.264)
-
-
-
-
-
|
|
Direct X
10
Direct 3D
10_1
|
Direct X
10
Direct 3D
10_1
|
|
OpenGL
3.3
OpenCL
1.1
-
-
|
OpenGL
3.3
OpenCL
1.1
-
-
|
|
Shader Model
4.1
-
-
GFX
3
-
-
-
-
|
Shader Model
4.1
-
-
GFX
3
-
-
-
-
|
|
-
-
-
1x Fan
|
-
-
-
1x Fan
|
|
Power Connectors
-
-
2x 6-Pin
-
-
-
-
|
Power Connectors
-
-
1x 6-Pin
1x 8-Pin
-
-
-
|
|
Slots Required
2.0
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
|
|
Height
110 mm (4.33 in)
Width
250 mm (9.84 in)
Depth
37 mm (1.46 in)
|
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