Radeon HD 4750 and Radeon RX 640 - video card comparison
Radeon HD 4750
Radeon RX 640
Architecture
TeraScale (2005−2013)
Polaris (2016−2019)
GPU code name
RV740
Polaris 12
Market segment
Desktop
Laptop
Release date
September 2009
August 2019
Interface
PCIe 2.0 x16
PCIe 3.0 x8
Supplementary power connectors
1x 6-pin
None
Boost clock speed
-
1218 MHz
Core clock speed
730 MHz
1218 MHz
Floating-point performance
934.4 gflops
-
Manufacturing process technology
40 nm
14 nm
Number of transistors
826 million
2,200 million
Pipelines / CUDA cores
640
640
Power consumption (TDP)
100 Watt
50 Watt
Texture fill rate
23.36
38.98
Memory type
GDDR5
GDDR5
Maximum RAM amount
512 MB
4 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
3200 MHz
6000 MHz
Memory bandwidth
51.2 GB/s
112.0 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x S-Video
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
-
+
DirectX
10.1 (10_1)
12 (12_0)
OpenCL
1.1
2.0
OpenGL
3.3
4.6
Shader Model
4.1
6.4
Vulkan
N/A
1.2.131
FreeSync
-
+