Radeon 620 Mobile vs Radeon Pro 555X
We compared two Mobile platform GPUs: 2GB VRAM Radeon 620 Mobile and 4GB VRAM Radeon Pro 555X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon 620 Mobile 's Advantages
Released 10 months late
Boost Clock1024MHz
Lower TDP (50W vs 75W)
Radeon Pro 555X 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (94.08GB/s vs 14.40GB/s)
384 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon 620 Mobile
786
Radeon Pro 555X
+77%
1393
Graphics Card
May 2019
Release Date
Jul 2018
Mobility Radeon
Generation
Radeon Pro Mac
Mobile
Type
Mobile
PCIe 3.0 x8
Bus Interface
PCIe 3.0 x8
Clock Speeds
730 MHz
Base Clock
-
1024 MHz
Boost Clock
-
900 MHz
Memory Clock
1470 MHz
Memory
2GB
Memory Size
4GB
DDR3
Memory Type
GDDR5
64bit
Memory Bus
128bit
14.40GB/s
Bandwidth
94.08GB/s
Render Config
6
Compute Units
12
384
Shading Units
768
24
TMUs
48
8
ROPs
16
16 KB (per CU)
L1 Cache
16 KB (per CU)
128 KB
L2 Cache
1024 KB
Theoretical Performance
8.192 GPixel/s
Pixel Rate
14.51 GPixel/s
24.58 GTexel/s
Texture Rate
43.54 GTexel/s
786.4 GFLOPS
FP16 (half)
1393 GFLOPS
786.4 GFLOPS
FP32 (float)
1393 GFLOPS
49.15 GFLOPS
FP64 (double)
87.07 GFLOPS
Board Design
50W
TDP
75W
No outputs
Outputs
No outputs
None
Power Connectors
None
Graphics Processor
Polaris 24
GPU Name
Polaris 21
Polaris 24 XL
GPU Variant
Polaris 21 PRO
GCN 3.0
Architecture
GCN 4.0
TSMC
Foundry
GlobalFoundries
28 nm
Process Size
14 nm
1.55 billion
Transistors
3 billion
125 mm²
Die Size
123 mm²
Graphics Features
12 (12_0)
DirectX
12 (12_0)
4.6
OpenGL
4.6
2.0
OpenCL
2.1
1.2
Vulkan
1.2
6.3
Shader Model
6.4
