AMD Radeon Instinct MI455X vs AMD Radeon R9 M395 Mac Edition
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
May 2015
Generation
Radeon Instinct
Crystal System
Type
Desktop
Mobile
Bus Interface
PCIe 6.0 x16
MXM-B (3.0)
Clock Speeds
Base Clock
1000 MHz
—
Boost Clock
2400 MHz
—
Memory Clock
1900 MHz
1365 MHz
Memory
Memory Size
432GB
2GB
Memory Type
HBM4
GDDR5
Memory Bus
24576bit
256bit
Bandwidth
23.3TB/s
174.7GB/s
Render Config
Compute Units
256
28
Shading Units
32768
1792
TMUs
1024
112
ROPs
0
32
L1 Cache
32 KB (per CU)
—
L2 Cache
192 MB
—
Theoretical Performance
Pixel Rate
0 MPixel/s
26.69 GPixel/s
Texture Rate
2457.6 GTexel/s
93.41 GTexel/s
FP16 (half)
157.3 TFLOPS
—
FP32 (float)
157.3 TFLOPS
2.989 TFLOPS
FP64 (double)
2.458 TFLOPS
373.6 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
Amethyst
Architecture
CDNA 5.0
GCN 3.0
Foundry
TSMC
TSMC
Process Size
2 nm
28 nm
Transistors
320 billion
5 billion
Die Size
Unknown
366 mm²
GPU Variant
—
Amethyst PRO(216-0872004)
Board Design
TDP
2300W
250W
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
2.0
Vulkan
N/A
1.2
Shader Model
N/A
6.3
▲ Specs Compare
Data sourced from official specifications and benchmark tests.