HD Graphics 620 and Radeon R9 255 OEM - video card comparison
HD Graphics 620
Radeon R9 255 OEM
Architecture
Gen. 9.5 Kaby Lake (2015−2017)
GCN 1.0 (2012−2020)
GPU code name
Kaby-Lake GT2
Cape Verde
Market segment
Laptop
Desktop
Release date
August 2016
December 2013
Interface
PCIe 3.0 x1
PCIe 3.0 x16
Supplementary power connectors
-
1x 6-pin
Boost clock speed
1050 MHz
930 MHz
Core clock speed
300 MHz
900 MHz
Floating-point performance
403.2 gflops
952.3 gflops
Manufacturing process technology
14 nm
28 nm
Number of transistors
189 million
1,500 million
Pipelines / CUDA cores
24
512
Power consumption (TDP)
15 Watt
65 Watt
Texture fill rate
25.20
29.76
Memory type
DDR3L/LPDDR3/LPDDR4
GDDR5
Maximum RAM amount
32 GB
2 GB
Memory bus width
64/128 Bit
128 Bit
Memory clock speed
System Shared
4600 MHz
Memory bandwidth
-
73.6 GB/s
Shared memory
+
-
Display Connectors
No outputs
No outputs
DirectX
12 (12_1)
12 (11_1)
OpenCL
2.1
1.2
OpenGL
4.6
4.6
Shader Model
6.4
5.1
Vulkan
+
1.2.131
Quick Sync
+
-