Quadro K620 and Radeon R9 255 OEM - video card comparison
Quadro K620
Radeon R9 255 OEM
Architecture
Maxwell (2014−2018)
GCN 1.0 (2012−2020)
GPU code name
GM107
Cape Verde
Market segment
Workstation
Desktop
Release date
July 2014
December 2013
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
1x 6-pin
Boost clock speed
1124 MHz
930 MHz
Core clock speed
1058 MHz
900 MHz
Floating-point performance
863.2 gflops
952.3 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,870 million
1,500 million
Pipelines / CUDA cores
384
512
Power consumption (TDP)
41 Watt
65 Watt
Texture fill rate
26.98
29.76
Memory type
128 Bit
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1800 MHz
4600 MHz
Memory bandwidth
Up to 29 GB/s
73.6 GB/s
Display Connectors
DVI-I DP
No outputs
Number of simultaneous displays
4
-
DirectX
12
12 (11_1)
CUDA
5.0
-
OpenCL
1.2
1.2
OpenGL
4.5
4.6
Shader Model
5
5.1
Vulkan
+
1.2.131
3D Vision Pro
+
-
Mosaic
+
-
nView Desktop Management
+
-