Radeon RX 5900 XT and Radeon RX 6600 XT - video card comparison
Radeon RX 5900 XT
Radeon RX 6600 XT
Architecture
RDNA 2.0 (2020−2022)
Navi / RDNA2 (2020−2022)
GPU code name
Navi 21
Navi 23
Market segment
Desktop
Desktop
Release date
-
July 2021
Interface
PCIe 4.0 x16
PCIe 4.0 x8
Supplementary power connectors
2x 8-pin
1x 8-pin
Boost clock speed
1735 MHz
2589 MHz
Core clock speed
-
1968 MHz
Manufacturing process technology
7 nm
7 nm
Number of transistors
21,000 million
11,060 million
Pipelines / CUDA cores
4352
2048
Power consumption (TDP)
300 Watt
160 (TGP) Watt
Texture fill rate
471.9
331.4
Memory type
GDDR6
GDDR6
Maximum RAM amount
12 GB
8 GB
Memory bus width
384 Bit
128 Bit
Memory clock speed
14000 MHz
16000 MHz
Memory bandwidth
672.0 GB/s
256.0 GB/s
Shared memory
-
-
Display Connectors
1x HDMI, 3x DisplayPort
1x HDMI, 2x DisplayPort
HDMI
+
+
DirectX
12 Ultimate (12_1)
12.0 Ultimate (12_2)
OpenCL
-
2.1
OpenGL
4.6
4.6
Shader Model
-
6.5
Vulkan
-
1.2