Radeon RX 6600 XT and Radeon R9 390X2 - video card comparison
Radeon RX 6600 XT
Radeon R9 390X2
Architecture
Navi / RDNA2 (2020−2022)
GCN (2011−2017)
GPU code name
Navi 23
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Market segment
Desktop
Desktop
Release date
July 2021
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Interface
PCIe 4.0 x8
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Supplementary power connectors
1x 8-pin
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Boost clock speed
2589 MHz
1000 MHz
Core clock speed
1968 MHz
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Manufacturing process technology
7 nm
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Number of transistors
11,060 million
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Pipelines / CUDA cores
2048
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Power consumption (TDP)
160 (TGP) Watt
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Texture fill rate
331.4
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Memory type
GDDR6
512
Maximum RAM amount
8 GB
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Memory bus width
128 Bit
5400 Bit
Memory clock speed
16000 MHz
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Memory bandwidth
256.0 GB/s
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Shared memory
-
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Display Connectors
1x HDMI, 2x DisplayPort
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HDMI
+
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DirectX
12.0 Ultimate (12_2)
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
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