AMD Radeon Instinct MI455X vs AMD Ryzen Z1 Extreme GPU
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
Jun 2023
Generation
Radeon Instinct
Console GPU
Type
Desktop
Desktop
Bus Interface
PCIe 6.0 x16
—
Clock Speeds
Base Clock
1000 MHz
800 MHz
Boost Clock
2400 MHz
2700 MHz
Memory Clock
1900 MHz
800 MHz
Memory
Memory Size
432GB
16GB
Memory Type
HBM4
LPDDR5
Memory Bus
24576bit
64bit
Bandwidth
23.3TB/s
25.60GB/s
Render Config
Compute Units
256
12
Shading Units
32768
768
TMUs
1024
48
ROPs
0
32
L1 Cache
32 KB (per CU)
128 KB per Array
L2 Cache
192 MB
8 MB
RT Cores
—
12
L3 Cache
—
16 MB
Theoretical Performance
Pixel Rate
0 MPixel/s
86.40 GPixel/s
Texture Rate
2457.6 GTexel/s
129.6 GTexel/s
FP16 (half)
157.3 TFLOPS
16.59 TFLOPS
FP32 (float)
157.3 TFLOPS
8.294 TFLOPS
FP64 (double)
2.458 TFLOPS
518.4 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
Phoenix
Architecture
CDNA 5.0
RDNA 3.0
Foundry
TSMC
TSMC
Process Size
2 nm
4 nm
Transistors
320 billion
25.39 billion
Die Size
Unknown
178 mm²
GPU Variant
—
100-000001278
Board Design
TDP
2300W
30W
Suggested PSU
2700 W
—
Outputs
No outputs
1x USB Type-C
Power Connectors
None
None
Graphics Features
DirectX
N/A
12 Ultimate (12_2)
OpenGL
N/A
4.6
OpenCL
3.0
2.1
Vulkan
N/A
1.3
Shader Model
N/A
6.8
▲ Specs Compare
Data sourced from official specifications and benchmark tests.