Radeon HD 7870 GHz vs Radeon HD 8770

Radeon HD 7870 GHz
Radeon HD 8770
1280 Shaders
2GB GDDR5
1000MHz
896 Shaders
2GB GDDR5
1000MHz
FP32
2.56 TFLOPS
FP32
1.79 TFLOPS
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-
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Form Factor
PCIe Card
2.0-Slots
Form Factor
PCIe Card
2.0-Slots
TDP
175W
TDP
85W
Power Connectors
2x 6-Pin
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-
-
Power Connectors
1x 6-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%
Manufacturer
AMD
Manufacturer
AMD
Chip Designer
AMD
Chip Designer
AMD
Architecture
GCN 1
Architecture
GCN 2
Family
Radeon HD 7000
Family
Radeon HD 8000
Codename
Pitcairn
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Variant
Pitcairn XT
Codename
Bonaire
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Variant
Bonaire XT
Market Segment
Desktop
Market Segment
Desktop
Release Date
3/5/2012
Release Date
9/2/2013
Foundry
TSMC
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Foundry
TSMC
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Fabrication Node
28nm
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Fabrication Node
28nm
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Die Size
212 mm²
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Die Size
160 mm²
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Transistor Count
2.8 Billion
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Transistor Count
2.1 Billion
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Transistor Density
13.21M/mm²
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Transistor Density
13.00M/mm²
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Form
PCIe Card
Form
PCIe Card
Shading Units
1280 Shaders
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Shading Units
896 Shaders
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Texture Mapping Units
80 TMUs
Texture Mapping Units
56 TMUs
Render Output Units
32 ROPs
Render Output Units
16 ROPs
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Compute Units
20 CUs
Compute Units
14 CUs
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1000MHz
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1000MHz
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FP32
2.56 TFLOPS
FP32
1.79 TFLOPS
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FP64
0.16 TFLOPS
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FP64
0.11 TFLOPS
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Pixel Fillrate
32 GPixel/s
Pixel Fillrate
16 GPixel/s
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Texture Fillrate
80 GTexel/s
Texture Fillrate
56 GTexel/s
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L1
-
-
16KB/CU
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L1
-
-
16KB/CU
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L2
512KB Shared
L2
256KB Shared
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-
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2GB
GDDR5
-
2GB
GDDR5
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Bus Width
256Bit
Bus Width
128Bit
Clock
1200MHz
Transfer Rate
4.8GT/s
Bandwidth
153.6GB/s
Clock
1500MHz
Transfer Rate
6GT/s
Bandwidth
96GB/s
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TDP
175W
TDP
85W
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1x DVI-I Dual-Link
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2x mini-DisplayPort 1.2
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1x HDMI 1.4
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1x DVI-I Dual-Link
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2x mini-DisplayPort 1.2
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1x HDMI 1.4
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Max Resolution
4096x2160
Max Resolution
4096x2160
Max Resolution Refresh Rate
60Hz
Max Resolution Refresh Rate
60Hz
Variable Refresh Rate
-
-
-
Variable Refresh Rate
-
FreeSync
-
Display Stream Compression (DSC)
Not Supported
Display Stream Compression (DSC)
Not Supported
Multi Monitor Support
3
Multi Monitor Support
3
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Model
VCE 1.0
Model
VCE 2.0
Codec
-
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AVC (H.264)
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Codec
-
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AVC (H.264)
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Model
UVD 4.0
Model
UVD 4.2
Codec
MPEG-1
MPEG-2
MPEG-4
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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
12
Direct 3D
11_1
Direct X
12
Direct 3D
12_0
OpenGL
4.6
OpenCL
2.1
Vulkan
1.2
OpenGL
4.6
OpenCL
2.1
Vulkan
1.2
Shader Model
6.5
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GFX
6
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Shader Model
6.5
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GFX
7
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1x Fan
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1x Fan
Power Connectors
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2x 6-Pin
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Power Connectors
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1x 6-Pin
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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
2-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
183 mm (7.2 in)
Depth
37 mm (1.46 in)
Change Results