AMD Radeon Instinct MI455X vs AMD Radeon E9390 PCIe
GPU Specs Compare
Graphics Card
Release Date
Jul 2026
Oct 2019
Generation
Radeon Instinct
Embedded
Type
Desktop
Mobile
Bus Interface
PCIe 6.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1000 MHz
713 MHz
Boost Clock
2400 MHz
1089 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
28
Shading Units
32768
1792
TMUs
1024
112
ROPs
0
32
L1 Cache
32 KB (per CU)
16 KB (per CU)
L2 Cache
192 MB
2 MB
Theoretical Performance
Pixel Rate
0 MPixel/s
34.85 GPixel/s
Texture Rate
2457.6 GTexel/s
122.0 GTexel/s
FP16 (half)
157.3 TFLOPS
3.903 TFLOPS
FP32 (float)
157.3 TFLOPS
3.903 TFLOPS
FP64 (double)
2.458 TFLOPS
243.9 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
Ellesmere
Architecture
CDNA 5.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
2 nm
14 nm
Transistors
320 billion
5.7 billion
Die Size
Unknown
232 mm²
Board Design
TDP
2300W
75W
Suggested PSU
2700 W
-
Outputs
No outputs
4x DisplayPort 1.4a
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