AMD Radeon HD 8870 vs AMD Radeon HD 7950 Mac
AMD Radeon HD 8870
AMD Radeon HD 7950 Mac
$330
|
1280 Shaders
2GB GDDR5
1000MHz
|
2048 Shaders
3GB GDDR5
800MHz
|
|
Peak AI Performance
2.56 TFLOPS
FP32
|
Peak AI Performance
3.28 TFLOPS
FP32
|
|
FP32
2.56 TFLOPS
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FP32
3.28 TFLOPS
|
|
Form Factor
PCIe Card
2.0-Slots
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Form Factor
PCIe Card
2.0-Slots
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|
TDP
150W
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TDP
200W
|
|
Power Connectors
2x 6-Pin
|
Power Connectors
2x 6-Pin
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Peak AI Performance
|
|
Radeon HD 8870 - 2.56 TFLOPS FP32
x1
Radeon HD 7950 Mac - 3.28 TFLOPS FP32
x1.28
FP32
|
|
Radeon HD 8870 - 2.56 TFLOPS FP32
x1
Radeon HD 7950 Mac - 3.28 TFLOPS FP32
x1.28
|
|
Radeon HD 8870 - 153.6GB/s
x1
Radeon HD 7950 Mac - 240GB/s
x1.56
|
|
Radeon HD 8870 - 150W
x1
Radeon HD 7950 Mac - 200W
x1.33
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0%
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Manufacturer
AMD
|
Manufacturer
AMD
|
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Chip Designer
AMD
|
Chip Designer
AMD
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Architecture
GCN 1
|
Architecture
GCN 1
|
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Family
Radeon HD 8000
|
Family
Radeon HD 7000
|
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Codename
Pitcairn
Variant
Pitcairn XT
|
Codename
Tahiti
Variant
Tahiti Pro
|
|
Market Segment
Desktop
|
Market Segment
Desktop
|
|
Release Date
1/8/2013
|
Release Date
3/7/2013
|
|
Foundry
TSMC
|
Foundry
TSMC
|
|
Fabrication Node
28nm
|
Fabrication Node
28nm
|
|
Die Size
212 mm²
|
Die Size
352 mm²
|
|
Transistor Count
2.8 Billion
|
Transistor Count
4.3 Billion
|
|
Transistor Density
13.21M/mm²
|
Transistor Density
12.25M/mm²
|
|
Form
PCIe Card
|
Form
PCIe Card
|
|
Shading Units
1280 Shaders
|
Shading Units
2048 Shaders
|
|
Texture Mapping Units
80 TMUs
|
Texture Mapping Units
112 TMUs
|
|
Render Output Units
32 ROPs
|
Render Output Units
32 ROPs
|
|
Compute Units
20 CUs
|
Compute Units
32 CUs
|
|
1000MHz
|
800MHz
|
|
Peak AI Performance
2.56 TFLOPS
FP32
|
Peak AI Performance
3.28 TFLOPS
FP32
|
|
FP32
2.56 TFLOPS
|
FP32
3.28 TFLOPS
|
|
FP64
160 GFLOPS
|
FP64
820 GFLOPS
|
|
Pixel Fillrate
32 GPixel/s
|
Pixel Fillrate
25.6 GPixel/s
|
|
Texture Fillrate
80 GTexel/s
|
Texture Fillrate
89.6 GTexel/s
|
|
L1
16KB/CU
|
L1
16KB/CU
|
|
L2
512KB Shared
|
L2
768KB Shared
|
|
2GB
GDDR5
|
3GB
GDDR5
|
|
Bus Width
256Bit
|
Bus Width
384Bit
|
|
Clock
1200MHz
Transfer Rate
4.8GT/s
Bandwidth
153.6GB/s
|
Clock
1250MHz
Transfer Rate
5GT/s
Bandwidth
240GB/s
|
|
TDP
150W
|
TDP
200W
|
|
1x DVI-I Dual-Link
2x mini-DisplayPort 1.2
1x HDMI 1.4
|
1x DVI-I Dual-Link
2x mini-DisplayPort 1.2
1x HDMI 1.4
|
|
Max Resolution
4096x2160
|
Max Resolution
4096x2160
|
|
Max Resolution Refresh Rate
60Hz
|
Max Resolution Refresh Rate
60Hz
|
|
Variable Refresh Rate
|
Variable Refresh Rate
|
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Display Stream Compression (DSC)
Not Supported
|
Display Stream Compression (DSC)
Not Supported
|
|
Multi Monitor Support
3
|
Multi Monitor Support
3
|
|
Model
VCE 1.0
|
Model
VCE 1.0
|
|
Codec
AVC (H.264)
|
Codec
AVC (H.264)
|
|
Model
UVD 4.0
|
Model
UVD 3.2
|
|
Codec
MPEG-1
MPEG-2
MPEG-4
VC-1
AVC (H.264)
|
Codec
MPEG-1
MPEG-2
MPEG-4
VC-1
AVC (H.264)
|
|
Direct X
12
Direct 3D
11_1
|
Direct X
12
Direct 3D
11_1
|
|
OpenGL
4.6
OpenCL
2.1
Vulkan
1.2
|
OpenGL
4.6
OpenCL
2.1
Vulkan
1.2
|
|
Shader Model
6.5
GFX
6
|
Shader Model
6.5
GFX
6
|
|
1x Fan
|
1x Fan
|
|
Power Connectors
2x 6-Pin
|
Power Connectors
2x 6-Pin
|
|
Slots Required
2.0
PCIe Version
3.0
PCIe Lanes
16
|
Slots Required
2.0
PCIe Version
3.0
PCIe Lanes
16
|
|
Multi GPU Support
Supported
Type
2-way CrossFireX
|
Multi GPU Support
Supported
Type
4-way CrossFireX
|
|
Height
111 mm (4.37 in)
Width
241 mm (9.49 in)
Depth
37 mm (1.46 in)
|
Height
111 mm (4.37 in)
Width
279 mm (10.98 in)
Depth
38 mm (1.5 in)
|
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