Radeon R9 285 vs Radeon HD 7990

Radeon R9 285
Radeon HD 7990
1792 Shaders
2GB GDDR5
918MHz
2x 2048 Shaders
2x 3GB GDDR5
1000MHz
FP32
3.29 TFLOPS
FP32
8.19 TFLOPS
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-
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Form Factor
PCIe Card
2.0-Slots
Form Factor
PCIe Card
2.0-Slots
TDP
190W
TDP
375W
Power Connectors
2x 6-Pin
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-
-
Power Connectors
-
2x 8-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 3
Architecture
GCN 1
Family
Radeon R 200
Family
Radeon HD 7000
Codename
Tonga
-
Variant
Tonga Pro
Codename
Tahiti
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Variant
New Zealand XT
Market Segment
Desktop
Market Segment
Desktop
Release Date
9/2/2014
Release Date
4/24/2013
Foundry
TSMC
-
Foundry
TSMC
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Fabrication Node
28nm
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Fabrication Node
28nm
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Die Size
359 mm²
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Die Size
2x 352 mm²
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Transistor Count
5 Billion
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Transistor Count
2x 4.3 Billion
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Transistor Density
13.93M/mm²
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Transistor Density
12.25M/mm²
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Form
PCIe Card
Form
PCIe Card
Shading Units
1792 Shaders
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Shading Units
2x 2048 Shaders
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Texture Mapping Units
112 TMUs
Texture Mapping Units
2x 128 TMUs
Render Output Units
32 ROPs
Render Output Units
2x 32 ROPs
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Compute Units
28 CUs
Compute Units
2x 32 CUs
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918MHz
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950MHz Base
1000MHz
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FP32
3.29 TFLOPS
FP32
8.19 TFLOPS
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FP64
0.21 TFLOPS
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FP64
2.05 TFLOPS
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Pixel Fillrate
29.376 GPixel/s
Pixel Fillrate
32 GPixel/s
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Texture Fillrate
102.816 GTexel/s
Texture Fillrate
128 GTexel/s
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L1
-
-
16KB/CU
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L1
-
-
16KB/CU
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L2
768KB Shared
L2
768KB Shared
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2GB
GDDR5
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2x 3GB
GDDR5
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Bus Width
256Bit
Bus Width
384Bit
Clock
1375MHz
Transfer Rate
5.5GT/s
Bandwidth
176GB/s
Clock
1500MHz
Transfer Rate
6GT/s
Bandwidth
288GB/s
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TDP
190W
TDP
375W
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2x DVI-D Dual-Link
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1x DisplayPort 1.2
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1x HDMI 1.4
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1x DVI-I Dual-Link
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4x mini-DisplayPort 1.2
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Max Resolution
4096x2160
Max Resolution
4096x2160
Max Resolution Refresh Rate
60Hz
Max Resolution Refresh Rate
60Hz
Variable Refresh Rate
-
FreeSync
-
Variable Refresh Rate
-
-
-
Display Stream Compression (DSC)
Not Supported
Display Stream Compression (DSC)
Not Supported
Multi Monitor Support
3
Multi Monitor Support
4
Content Protection
HDCP 1.4
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-
Model
VCE 3.0
Model
VCE 1.0
Codec
-
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AVC (H.264)
HEVC (H.265)
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Codec
-
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AVC (H.264)
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Model
UVD 5.0
Model
UVD 3.2
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
12_0
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
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GFX
8
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Shader Model
6.5
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GFX
6
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1x Fan
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3x Fans
Power Connectors
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2x 6-Pin
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Power Connectors
-
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2x 8-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
CrossFire XDMA
Multi GPU Support
Supported
Type
2-way CrossFireX
Height
110 mm (4.33 in)
Width
221 mm (8.7 in)
Depth
36 mm (1.42 in)
Height
115 mm (4.53 in)
Width
304 mm (11.97 in)
Depth
38 mm (1.5 in)
Change Results