AMD Radeon Instinct MI455X vs AMD Radeon R9 M485X
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
May 2016
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
1250 MHz
Memory
Memory Size
432GB
8GB
Memory Type
HBM4
GDDR5
Memory Bus
24576bit
256bit
Bandwidth
23.3TB/s
160.0GB/s
Render Config
Compute Units
256
32
Shading Units
32768
2048
TMUs
1024
128
ROPs
0
32
L1 Cache
32 KB (per CU)
16 KB (per CU)
L2 Cache
192 MB
512 KB
Theoretical Performance
Pixel Rate
0 MPixel/s
23.14 GPixel/s
Texture Rate
2457.6 GTexel/s
92.54 GTexel/s
FP16 (half)
157.3 TFLOPS
2.961 TFLOPS
FP32 (float)
157.3 TFLOPS
2.961 TFLOPS
FP64 (double)
2.458 TFLOPS
185.1 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 XT
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.