AMD Radeon Instinct MI455X vs AMD Radeon R9 M290X Mac Edition
GPU Specs Compare
Graphics Card
Release Date
Jul 2026
Nov 2014
Generation
Radeon Instinct
Crystal System
Type
Desktop
Mobile
Bus Interface
PCIe 6.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1000 MHz
850 MHz
Boost Clock
2400 MHz
975 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
16
Shading Units
32768
1024
TMUs
1024
64
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
31.20 GPixel/s
Texture Rate
2457.6 GTexel/s
62.40 GTexel/s
FP16 (half)
157.3 TFLOPS
-
FP32 (float)
157.3 TFLOPS
1.997 TFLOPS
FP64 (double)
2.458 TFLOPS
124.8 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
Pitcairn
Architecture
CDNA 5.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
2 nm
28 nm
Transistors
320 billion
2.8 billion
Die Size
Unknown
212 mm²
GPU Variant
-
Pitcairn PRO(215-0828062)
Board Design
TDP
2300W
80W
Suggested PSU
2700 W
-
Outputs
No outputs
No outputs
Power Connectors
None
None
Graphics Features
DirectX
N/A
12 (11_1)
OpenGL
N/A
4.6
OpenCL
3.0
1.2
Vulkan
N/A
1.2
Shader Model
N/A
5.1