AMD Radeon HD 6990 vs AMD Radeon HD 7950 Mac
AMD Radeon HD 6990
$699
AMD Radeon HD 7950 Mac
$330
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2x 1536 Shaders
4GB (2x 2GB) GDDR5
830MHz
|
2048 Shaders
3GB GDDR5
800MHz
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|
Peak AI Performance
5.1 TFLOPS
FP32
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Peak AI Performance
3.28 TFLOPS
FP32
|
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FP32
5.1 TFLOPS
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FP32
3.28 TFLOPS
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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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Peak AI Performance
|
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Radeon HD 6990 - 5.1 TFLOPS FP32
x1.55
Radeon HD 7950 Mac - 3.28 TFLOPS FP32
x1
FP32
|
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Radeon HD 6990 - 5.1 TFLOPS FP32
x1.55
Radeon HD 7950 Mac - 3.28 TFLOPS FP32
x1
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Radeon HD 6990 - 160GB/s
x1
Radeon HD 7950 Mac - 240GB/s
x1.5
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Radeon HD 6990 - 375W
x1.88
Radeon HD 7950 Mac - 200W
x1
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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
|
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
|
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
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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
|
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
|
|
Texture Mapping Units
2x 96 TMUs
|
Texture Mapping Units
112 TMUs
|
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Render Output Units
2x 32 ROPs
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Render Output Units
32 ROPs
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Compute Units
2x 24 CUs
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Compute Units
32 CUs
|
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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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FP32
5.1 TFLOPS
|
FP32
3.28 TFLOPS
|
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FP64
1.27 TFLOPS
|
FP64
820 GFLOPS
|
|
Pixel Fillrate
26.56 GPixel/s
|
Pixel Fillrate
25.6 GPixel/s
|
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Texture Fillrate
79.68 GTexel/s
|
Texture Fillrate
89.6 GTexel/s
|
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L1
8KB/CU
|
L1
16KB/CU
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L2
512KB Shared
|
L2
768KB Shared
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4GB (2x 2GB)
GDDR5
|
3GB
GDDR5
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Bus Width
256Bit
|
Bus Width
384Bit
|
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Clock
1250MHz
Transfer Rate
5GT/s
Bandwidth
160GB/s
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Clock
1250MHz
Transfer Rate
5GT/s
Bandwidth
240GB/s
|
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TDP
375W
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TDP
200W
|
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1x DVI-I Dual-Link
4x mini-DisplayPort 1.1
-
-
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1x DVI-I Dual-Link
-
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
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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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No Encoders
-
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Model
VCE 1.0
|
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-
-
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Codec
AVC (H.264)
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Model
UVD 3.1
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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
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Direct X
12
Direct 3D
11_1
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OpenGL
4.5
OpenCL
1.2
-
-
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OpenGL
4.6
OpenCL
2.1
Vulkan
1.2
|
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Shader Model
5.0
GFX
5
|
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
-
|
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Slots Required
2.0
PCIe Version
2.1
PCIe Lanes
16
|
Slots Required
2.0
PCIe Version
3.0
PCIe Lanes
16
|
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Multi GPU Support
Supported
Type
2-way CrossFireX
|
Multi GPU Support
Supported
Type
4-way CrossFireX
|
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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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