GeForce GT 520 and GeForce GTX 645 OEM - video card comparison
GeForce GT 520
GeForce GTX 645 OEM
Architecture
Fermi 2.0 (2010−2014)
Kepler (2012−2018)
GPU code name
GF119
GK106
Market segment
Desktop
Desktop
Release date
April 2011
April 2013
Bus support
16x PCI-E 2.0
-
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
None
Core clock speed
810 MHz
824 MHz
CUDA cores
48
-
Floating-point performance
155.52 gflops
949.2 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
292 million
2,540 million
Pipelines / CUDA cores
48
576
Power consumption (TDP)
29 Watt
65 Watt
Maximum GPU temperature
102 °C
-
Texture fill rate
6.5 billion/sec
39.55
Memory type
DDR3
GDDR5
Maximum RAM amount
1 GB (DDR3)
1 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
900 MHz (DDR3)
4000 MHz
Memory bandwidth
14.4 GB/s
64 GB/s
Display Connectors
Dual Link DVI-IHDMIVGA (optional)
1x DVI, 1x HDMI, 1x DisplayPort
Multi monitor support
+
-
HDMI
+
+
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 (11_0)
CUDA
+
3.0
OpenCL
1.1
1.2
OpenGL
4.2
4.6
Shader Model
5.1
5.1
Vulkan
N/A
1.1.126