AMD Radeon HD 6990 vs AMD Radeon HD 7950 Mac
AMD Radeon HD 6990
$699
AMD Radeon HD 7950 Mac
$330
|
2x 1536 Shaders
4GB (2x 2GB) GDDR5
830MHz
|
2048 Shaders
3GB GDDR5
800MHz
|
|
Peak AI Performance
5.1 TFLOPS
FP32
|
Peak AI Performance
3.28 TFLOPS
FP32
|
|
FP32
5.1 TFLOPS
|
FP32
3.28 TFLOPS
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-
-
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-
-
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Form Factor
PCIe Card
2.0-Slots
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Form Factor
PCIe Card
2.0-Slots
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TDP
375W
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TDP
200W
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Power Connectors
-
2x 8-Pin
-
-
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Power Connectors
2x 6-Pin
-
-
-
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GB6 OpenCL N/A
0%
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GB6 OpenCL N/A
0%
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GB6 Metal N/A
0%
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GB6 Metal N/A
0%
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GB6 Vulkan N/A
0%
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GB6 Vulkan N/A
0%
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GB5 OpenCL N/A
0%
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GB5 OpenCL N/A
0%
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GB5 CUDA N/A
0%
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GB5 CUDA N/A
0%
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GB5 Metal N/A
0%
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GB5 Metal N/A
0%
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GB5 Vulkan N/A
0%
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GB5 Vulkan N/A
0%
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OCT 2020.1 N/A
0%
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OCT 2020.1 N/A
0%
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OCT Metal N/A
0%
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OCT Metal N/A
0%
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Manufacturer
AMD
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Manufacturer
AMD
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Chip Designer
AMD
|
Chip Designer
AMD
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Architecture
TeraScale 3
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Architecture
GCN 1
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Family
Radeon HD 6000
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Family
Radeon HD 7000
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Codename
Cayman
RV970
Variant
Antilles XT
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Codename
Tahiti
-
Variant
Tahiti Pro
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Market Segment
Desktop
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Market Segment
Desktop
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Release Date
3/8/2011
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Release Date
3/7/2013
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Foundry
TSMC
-
|
Foundry
TSMC
-
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Fabrication Node
40nm
-
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Fabrication Node
28nm
-
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Die Size
2x 389 mm²
-
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Die Size
352 mm²
-
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Transistor Count
2x 2.6 Billion
-
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Transistor Count
4.3 Billion
-
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Transistor Density
6.79M/mm²
-
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Transistor Density
12.25M/mm²
-
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Form
PCIe Card
|
Form
PCIe Card
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Shading Units
2x 1536 Shaders
-
|
Shading Units
2048 Shaders
-
|
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Texture Mapping Units
2x 96 TMUs
|
Texture Mapping Units
112 TMUs
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|
Render Output Units
2x 32 ROPs
|
Render Output Units
32 ROPs
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-
-
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-
-
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-
-
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-
-
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-
-
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-
-
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Compute Units
2x 24 CUs
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Compute Units
32 CUs
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-
-
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-
-
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-
-
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-
-
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-
-
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830MHz
|
-
-
-
800MHz
|
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Peak AI Performance
5.1 TFLOPS
FP32
|
Peak AI Performance
3.28 TFLOPS
FP32
|
|
-
-
-
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-
-
-
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-
-
-
-
-
-
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-
-
-
-
-
-
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-
-
-
-
-
-
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-
-
-
-
-
-
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FP32
5.1 TFLOPS
-
-
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FP32
3.28 TFLOPS
-
-
|
|
FP64
1.27 TFLOPS
-
|
FP64
820 GFLOPS
-
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-
-
-
-
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-
-
-
-
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-
-
-
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-
-
-
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-
-
-
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-
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-
-
-
-
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-
-
-
-
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-
-
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-
-
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-
-
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-
-
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Pixel Fillrate
26.56 GPixel/s
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Pixel Fillrate
25.6 GPixel/s
|
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-
-
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-
-
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Texture Fillrate
79.68 GTexel/s
|
Texture Fillrate
89.6 GTexel/s
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-
-
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-
-
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L1
-
-
8KB/CU
-
|
L1
-
-
16KB/CU
-
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L2
512KB Shared
|
L2
768KB Shared
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-
-
-
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-
-
-
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4GB (2x 2GB)
GDDR5
-
|
3GB
GDDR5
-
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Bus Width
256Bit
|
Bus Width
384Bit
|
|
Clock
1250MHz
Transfer Rate
5GT/s
Bandwidth
160GB/s
|
Clock
1250MHz
Transfer Rate
5GT/s
Bandwidth
240GB/s
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-
-
-
-
-
-
-
-
-
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-
-
-
-
-
-
-
-
-
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TDP
375W
|
TDP
200W
|
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-
-
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-
-
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-
-
-
-
-
-
-
-
1x DVI-I Dual-Link
-
-
-
-
-
4x mini-DisplayPort 1.1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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-
-
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1x DVI-I Dual-Link
-
-
-
-
-
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2x mini-DisplayPort 1.2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1x HDMI 1.4
-
-
-
-
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Max Resolution
2560x1600
|
Max Resolution
4096x2160
|
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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
|
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Multi Monitor Support
4
|
Multi Monitor Support
3
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-
-
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-
-
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No Encoders
-
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Model
VCE 1.0
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-
-
-
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-
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-
-
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-
-
-
-
-
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Codec
-
-
-
-
-
-
-
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AVC (H.264)
-
-
-
-
-
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Model
UVD 3.1
|
Model
UVD 3.2
|
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Codec
MPEG-1
MPEG-2
MPEG-4
-
VC-1
-
-
-
AVC (H.264)
-
-
-
-
-
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Codec
MPEG-1
MPEG-2
MPEG-4
-
VC-1
-
-
-
AVC (H.264)
-
-
-
-
-
|
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Direct X
11
Direct 3D
11_0
|
Direct X
12
Direct 3D
11_1
|
|
OpenGL
4.5
OpenCL
1.2
-
-
|
OpenGL
4.6
OpenCL
2.1
Vulkan
1.2
|
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Shader Model
5.0
-
-
GFX
5
-
-
-
-
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Shader Model
6.5
-
-
GFX
6
-
-
-
-
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-
-
-
1x Fan
|
-
-
-
1x Fan
|
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Power Connectors
-
-
-
2x 8-Pin
-
-
-
|
Power Connectors
-
-
2x 6-Pin
-
-
-
-
|
|
Slots Required
2.0
PCIe Version
2.1
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
115 mm (4.53 in)
Width
310 mm (12.2 in)
Depth
40 mm (1.57 in)
|
Height
111 mm (4.37 in)
Width
279 mm (10.98 in)
Depth
38 mm (1.5 in)
|
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