AMD Radeon Instinct MI455X vs AMD Radeon RX 7800M
GPU Specs Compare
Graphics Card
Release Date
Jul 2026
Sep 2024
Generation
Radeon Instinct
Navi Mobile
Type
Desktop
Mobile
Bus Interface
PCIe 6.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
1000 MHz
1295 MHz
Boost Clock
2400 MHz
2335 MHz
Memory Clock
1900 MHz
2250 MHz
Memory
Memory Size
432GB
12GB
Memory Type
HBM4
GDDR6
Memory Bus
24576bit
192bit
Bandwidth
23.3TB/s
432.0GB/s
Render Config
Compute Units
256
60
Shading Units
32768
3840
TMUs
1024
240
ROPs
0
96
L1 Cache
32 KB (per CU)
128 KB per Array
L2 Cache
192 MB
4 MB
RT Cores
-
60
L3 Cache
-
48 MB
Theoretical Performance
Pixel Rate
0 MPixel/s
224.2 GPixel/s
Texture Rate
2457.6 GTexel/s
560.4 GTexel/s
FP16 (half)
157.3 TFLOPS
71.73 TFLOPS
FP32 (float)
157.3 TFLOPS
35.87 TFLOPS
FP64 (double)
2.458 TFLOPS
1121 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
Navi 32
Architecture
CDNA 5.0
RDNA 3.0
Foundry
TSMC
TSMC
Process Size
2 nm
5 nm
Transistors
320 billion
28.1 billion
Die Size
Unknown
346 mm²
GPU Variant
-
Navi 32 XT(215-180000006)
Board Design
TDP
2300W
180W
Suggested PSU
2700 W
-
Outputs
No outputs
Portable Device Dependent
Power Connectors
None
None
Graphics Features
DirectX
N/A
12 Ultimate (12_2)
OpenGL
N/A
4.6
OpenCL
3.0
2.2
Vulkan
N/A
1.3
Shader Model
N/A
6.8