Radeon R7 450 OEM and Radeon RX 640 OEM - video card comparison
Radeon R7 450 OEM
Radeon RX 640 OEM
Architecture
GCN 1.0 (2012−2020)
GCN 4.0 (2016−2020)
GPU code name
Cape Verde
Polaris 23
Market segment
Desktop
Desktop
Release date
June 2016
April 2020
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
None
None
Core clock speed
925 MHz
1295 MHz
Floating-point performance
947.2 gflops
-
Manufacturing process technology
28 nm
14 nm
Number of transistors
1,500 million
2,200 million
Pipelines / CUDA cores
512
640
Power consumption (TDP)
65 Watt
50 Watt
Texture fill rate
29.60
51.80
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
4 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
4.5 GB/s
6 GB/s
Memory bandwidth
72 GB/s
96 GB/s
Display Connectors
1x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
1x DisplayPort 1.4a, 2x mini-DisplayPort 1.4a
HDMI
+
-
DirectX
12 (11_1)
12 (12_0)
OpenCL
2.1 (1.2)
2.1
OpenGL
4.6
4.6
Shader Model
6.5 (5.1)
6.7 (6.4)
Vulkan
1.2.170
1.3