AMD Radeon HD 7950 vs AMD Radeon HD 6870
AMD Radeon HD 7950
$450
AMD Radeon HD 6870
$239
|
1792 Shaders
3GB GDDR5
800MHz
|
1120 Shaders
2GB GDDR5
900MHz
|
|
Peak AI Performance
2.87 TFLOPS
FP32
|
Peak AI Performance
2.02 TFLOPS
FP32
|
|
FP32
2.87 TFLOPS
|
FP32
2.02 TFLOPS
|
|
Form Factor
PCIe Card
2.0-Slots
|
Form Factor
PCIe Card
2.0-Slots
|
|
TDP
200W
|
TDP
151W
|
|
Power Connectors
2x 6-Pin
|
Power Connectors
2x 6-Pin
|
Peak AI Performance
|
|
Radeon HD 7950 - 2.87 TFLOPS FP32
x1.42
Radeon HD 6870 - 2.02 TFLOPS FP32
x1
FP32
|
|
Radeon HD 7950 - 2.87 TFLOPS FP32
x1.42
Radeon HD 6870 - 2.02 TFLOPS FP32
x1
|
|
Radeon HD 7950 - 240GB/s
x1.79
Radeon HD 6870 - 134.4GB/s
x1
|
|
Radeon HD 7950 - 200W
x1.32
Radeon HD 6870 - 151W
x1
|
|
Radeon HD 7950 - GB6 OpenCL 27,385
x4.93
Radeon HD 6870 - GB6 OpenCL 5,555
x1
|
Manufacturer
AMD
|
Manufacturer
AMD
|
|
Chip Designer
AMD
|
Chip Designer
AMD
|
|
Architecture
GCN 1
|
Architecture
TeraScale 2
|
|
Family
Radeon HD 7000
|
Family
Radeon HD 6000
|
|
Codename
Tahiti
-
Variant
Tahiti Pro
|
Codename
Barts
RV940
Variant
Barts XT
|
|
Market Segment
Desktop
|
Market Segment
Desktop
|
|
Release Date
1/31/2012
|
Release Date
10/22/2010
|
|
Foundry
TSMC
|
Foundry
TSMC
|
|
Fabrication Node
28nm
|
Fabrication Node
40nm
|
|
Die Size
352 mm²
|
Die Size
255 mm²
|
|
Transistor Count
4.3 Billion
|
Transistor Count
1.7 Billion
|
|
Transistor Density
12.25M/mm²
|
Transistor Density
6.67M/mm²
|
|
Form
PCIe Card
|
Form
PCIe Card
|
|
Shading Units
1792 Shaders
|
Shading Units
1120 Shaders
|
|
Texture Mapping Units
112 TMUs
|
Texture Mapping Units
56 TMUs
|
|
Render Output Units
32 ROPs
|
Render Output Units
32 ROPs
|
|
Compute Units
28 CUs
|
Compute Units
14 CUs
|
|
800MHz
|
900MHz
|
|
Peak AI Performance
2.87 TFLOPS
FP32
|
Peak AI Performance
2.02 TFLOPS
FP32
|
|
FP32
2.87 TFLOPS
|
FP32
2.02 TFLOPS
|
|
FP64
720 GFLOPS
|
-
-
|
|
Pixel Fillrate
25.6 GPixel/s
|
Pixel Fillrate
28.8 GPixel/s
|
|
Texture Fillrate
89.6 GTexel/s
|
Texture Fillrate
50.4 GTexel/s
|
|
L1
16KB/CU
|
L1
8KB/CU
|
|
L2
768KB Shared
|
L2
512KB Shared
|
|
3GB
GDDR5
|
2GB
GDDR5
|
|
Bus Width
384Bit
|
Bus Width
256Bit
|
|
Clock
1250MHz
Transfer Rate
5GT/s
Bandwidth
240GB/s
|
Clock
1050MHz
Transfer Rate
4.2GT/s
Bandwidth
134.4GB/s
|
|
TDP
200W
|
TDP
151W
|
|
1x DVI-I Dual-Link
-
2x mini-DisplayPort 1.2
-
1x HDMI 1.4
|
2x DVI-I Dual-Link
2x mini-DisplayPort 1.1
-
1x HDMI 1.3
-
|
|
Max Resolution
4096x2160
|
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
3
|
Multi Monitor Support
2
|
|
Model
VCE 1.0
|
No Encoders
-
|
|
Codec
AVC (H.264)
|
-
-
|
|
Model
UVD 3.2
|
Model
UVD 3.0
|
|
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
11
Direct 3D
11_0
|
|
OpenGL
4.6
OpenCL
2.1
Vulkan
1.2
|
OpenGL
4.5
OpenCL
1.2
-
-
|
|
Shader Model
6.5
GFX
6
|
Shader Model
5.0
GFX
4
|
|
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
2.1
PCIe Lanes
16
|
|
Multi GPU Support
Supported
Type
4-way CrossFireX
|
Multi GPU Support
Supported
Type
4-way CrossFireX
|
|
Height
111 mm (4.37 in)
Width
275 mm (10.83 in)
Depth
38 mm (1.5 in)
|
Height
111 mm (4.37 in)
Width
247 mm (9.72 in)
Depth
36 mm (1.42 in)
|
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