Radeon RX 6900 XTX and Radeon RX 6600 XT - video card comparison
Radeon RX 6900 XTX
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
October 2020
July 2021
Interface
PCIe 4.0 x16
PCIe 4.0 x8
Supplementary power connectors
2x 8-pin
1x 8-pin
Boost clock speed
2435 MHz
2589 MHz
Core clock speed
-
1968 MHz
Manufacturing process technology
7 nm
7 nm
Number of transistors
26,800 million
11,060 million
Pipelines / CUDA cores
5120
2048
Power consumption (TDP)
330 Watt
160 (TGP) Watt
Texture fill rate
779.2
331.4
Memory type
GDDR6
GDDR6
Maximum RAM amount
16 GB
8 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
18 GB/s
16000 MHz
Memory bandwidth
576.0 GB/s
256.0 GB/s
Shared memory
-
-
Display Connectors
1x HDMI 2.1, 2x DisplayPort 1.4a, 1x USB Type-C
1x HDMI, 2x DisplayPort
HDMI
+
+
DirectX
12 Ultimate (12_2)
12.0 Ultimate (12_2)
OpenCL
2.1
2.1
OpenGL
4.6
4.6
Shader Model
6.7
6.5
Vulkan
1.3
1.2