Radeon R9 285 and Radeon R9 390X2 - video card comparison
Radeon R9 285
Radeon R9 390X2
Architecture
GCN 3.0 (2014−2017)
GCN (2011−2017)
GPU code name
Tonga
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Market segment
Desktop
Desktop
Release date
September 2014
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Interface
PCIe 3.0 x16
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Supplementary power connectors
2x 6-pin
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Boost clock speed
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1000 MHz
Core clock speed
918 MHz
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Floating-point performance
3,290 gflops
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Manufacturing process technology
28 nm
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Number of transistors
5,000 million
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Pipelines / CUDA cores
1792
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Power consumption (TDP)
190 Watt
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Texture fill rate
102.8
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Memory type
GDDR5
512
Maximum RAM amount
2 GB
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Memory bus width
256 Bit
5400 Bit
Memory clock speed
5.5 GB/s
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Memory bandwidth
176.0 GB/s
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Display Connectors
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
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HDMI
+
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DirectX
12 (12_0)
GDDR5
OpenCL
2.1
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OpenGL
4.6
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Shader Model
6.5
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Vulkan
1.2.170
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