AMD Radeon RX 7900M vs AMD Radeon Instinct MI455X
GPU Specs Compare
Graphics Card
Release Date
Oct 2023
Jul 2026
Generation
Navi Mobile
Radeon Instinct
Type
Mobile
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 6.0 x16
Clock Speeds
Base Clock
1825 MHz
1000 MHz
Boost Clock
2090 MHz
2400 MHz
Memory Clock
2250 MHz
1900 MHz
Memory
Memory Size
16GB
432GB
Memory Type
GDDR6
HBM4
Memory Bus
256bit
24576bit
Bandwidth
576.0GB/s
23.3TB/s
Render Config
Compute Units
72
256
Shading Units
4608
32768
TMUs
288
1024
ROPs
192
0
RT Cores
72
-
L1 Cache
256 KB per Array
32 KB (per CU)
L2 Cache
6 MB
192 MB
L3 Cache
64 MB
-
Theoretical Performance
Pixel Rate
401.3 GPixel/s
0 MPixel/s
Texture Rate
601.9 GTexel/s
2457.6 GTexel/s
FP16 (half)
77.05 TFLOPS
157.3 TFLOPS
FP32 (float)
38.52 TFLOPS
157.3 TFLOPS
FP64 (double)
1204 GFLOPS
2.458 TFLOPS
Graphics Processor
GPU Name
Navi 31
MI450 256CU
GPU Variant
Navi 31
-
Architecture
RDNA 3.0
CDNA 5.0
Foundry
TSMC
TSMC
Process Size
5 nm
2 nm
Transistors
57.7 billion
320 billion
Die Size
529 mm²
Unknown
Board Design
TDP
180W
2300W
Outputs
Portable Device Dependent
No outputs
Power Connectors
None
None
Suggested PSU
-
2700 W
Graphics Features
DirectX
12 Ultimate (12_2)
N/A
OpenGL
4.6
N/A
OpenCL
2.2
3.0
Vulkan
1.3
N/A
Shader Model
6.8
N/A
📊 Benchmark
3DMark Time Spy
18,218
-
3DMark Time Spy Extreme
8,440
-
3DMark Speed Way
3,943
-
Blender
2,583
-