Radeon R9 255 OEM and Radeon RX 6400 - video card comparison
Radeon R9 255 OEM
Radeon RX 6400
Architecture
GCN 1.0 (2012−2020)
RDNA 2.0 (2020−2022)
GPU code name
Cape Verde
Navi 24
Market segment
Desktop
Desktop
Release date
December 2013
January 2022
Interface
PCIe 3.0 x16
PCIe 4.0 x4
Supplementary power connectors
1x 6-pin
None
Boost clock speed
930 MHz
2321 MHz
Core clock speed
900 MHz
-
Floating-point performance
952.3 gflops
-
Manufacturing process technology
28 nm
6 nm
Number of transistors
1,500 million
5,400 million
Pipelines / CUDA cores
512
768
Power consumption (TDP)
65 Watt
53 Watt
Texture fill rate
29.76
111.4
Memory type
GDDR5
GDDR6
Maximum RAM amount
2 GB
4 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
4600 MHz
16 GB/s
Memory bandwidth
73.6 GB/s
128.0 GB/s
Display Connectors
No outputs
1x HDMI 2.1, 1x DisplayPort 1.4a
HDMI
-
+
DirectX
12 (11_1)
12 Ultimate (12_2)
OpenCL
1.2
2.2
OpenGL
4.6
4.6
Shader Model
5.1
6.6
Vulkan
1.2.131
1.3