Radeon Pro 555X and GeForce GTX 645 OEM - video card comparison
Radeon Pro 555X
GeForce GTX 645 OEM
Architecture
Polaris (2016−2019)
Kepler (2012−2018)
GPU code name
Polaris 21
GK106
Market segment
Mobile workstation
Desktop
Release date
June 2017
April 2013
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Supplementary power connectors
None
None
Core clock speed
855 MHz
824 MHz
Floating-point performance
-
949.2 gflops
Manufacturing process technology
14 nm
28 nm
Number of transistors
3,000 million
2,540 million
Pipelines / CUDA cores
768
576
Power consumption (TDP)
-
65 Watt
Texture fill rate
43.54
39.55
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
1 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
5080 MHz
4000 MHz
Memory bandwidth
81.6 GB/s
64 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
-
+
DirectX
12 (12_0)
12 (11_0)
CUDA
-
3.0
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.4
5.1
Vulkan
1.2.131
1.1.126
FreeSync
+
-