GeForce GTX 645 OEM and Radeon 540X - video card comparison
GeForce GTX 645 OEM
Radeon 540X
Architecture
Kepler (2012−2018)
GCN 4.0 (2016−2020)
GPU code name
GK106
Lexa
Market segment
Desktop
Laptop
Release date
April 2013
August 2019
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
None
None
Boost clock speed
-
1219 MHz
Core clock speed
824 MHz
-
Floating-point performance
949.2 gflops
-
Manufacturing process technology
28 nm
14 nm
Number of transistors
2,540 million
2,200 million
Pipelines / CUDA cores
576
512
Power consumption (TDP)
65 Watt
50 Watt
Texture fill rate
39.55
33.47
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
2 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
4000 MHz
6000 MHz
Memory bandwidth
64 GB/s
112.0 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (11_0)
12 (12_0)
CUDA
3.0
-
OpenCL
1.2
2.0
OpenGL
4.6
4.6
Shader Model
5.1
6.4
Vulkan
1.1.126
1.2.131