AMD Radeon Instinct MI455X vs AMD Radeon RX 550 Mobile
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
Jul 2017
Generation
Radeon Instinct
Mobility Radeon
Type
Desktop
Mobile
Bus Interface
PCIe 6.0 x16
PCIe 3.0 x8
Clock Speeds
Base Clock
1000 MHz
1100 MHz
Boost Clock
2400 MHz
1287 MHz
Memory Clock
1900 MHz
1500 MHz
Memory
Memory Size
432GB
2GB
Memory Type
HBM4
GDDR5
Memory Bus
24576bit
128bit
Bandwidth
23.3TB/s
96.00GB/s
Render Config
Compute Units
256
10
Shading Units
32768
640
TMUs
1024
40
ROPs
0
16
L1 Cache
32 KB (per CU)
16 KB (per CU)
L2 Cache
192 MB
512 KB
Theoretical Performance
Pixel Rate
0 MPixel/s
20.59 GPixel/s
Texture Rate
2457.6 GTexel/s
51.48 GTexel/s
FP16 (half)
157.3 TFLOPS
1.647 TFLOPS
FP32 (float)
157.3 TFLOPS
1.647 TFLOPS
FP64 (double)
2.458 TFLOPS
103.0 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
Lexa
Architecture
CDNA 5.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
2 nm
14 nm
Transistors
320 billion
2.2 billion
Die Size
Unknown
103 mm²
GPU Variant
—
Lexa PRO(215-0904018)
Board Design
TDP
2300W
50W
Suggested PSU
2700 W
—
Outputs
No outputs
No outputs
Power Connectors
None
None
Graphics Features
DirectX
N/A
12 (12_0)
OpenGL
N/A
4.6
OpenCL
3.0
2.1
Vulkan
N/A
1.2
Shader Model
N/A
6.4
▲ Specs Compare
Data sourced from official specifications and benchmark tests.