AMD Radeon Instinct MI455X vs NVIDIA GeForce RTX 4070 Mobile
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
Jan 2023
Generation
Radeon Instinct
GeForce 40 Mobile
Type
Desktop
Mobile
Bus Interface
PCIe 6.0 x16
PCIe 4.0 x8
Clock Speeds
Base Clock
1000 MHz
1395 MHz
Boost Clock
2400 MHz
1695 MHz
Memory Clock
1900 MHz
2000 MHz
Memory
Memory Size
432GB
8GB
Memory Type
HBM4
GDDR6
Memory Bus
24576bit
128bit
Bandwidth
23.3TB/s
256.0GB/s
Render Config
Compute Units
256
—
Shading Units
32768
4608
TMUs
1024
144
ROPs
0
48
L1 Cache
32 KB (per CU)
128 KB (per SM)
L2 Cache
192 MB
32 MB
SM Count
—
36
Tensor Cores
—
144
RT Cores
—
36
Theoretical Performance
Pixel Rate
0 MPixel/s
81.36 GPixel/s
Texture Rate
2457.6 GTexel/s
244.1 GTexel/s
FP16 (half)
157.3 TFLOPS
15.62 TFLOPS
FP32 (float)
157.3 TFLOPS
15.62 TFLOPS
FP64 (double)
2.458 TFLOPS
244.1 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
AD106
Architecture
CDNA 5.0
Ada Lovelace
Foundry
TSMC
TSMC
Process Size
2 nm
5 nm
Transistors
320 billion
22.9 billion
Die Size
Unknown
188 mm²
GPU Variant
—
GN21-X6
Board Design
TDP
2300W
115W
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
3.0
Vulkan
N/A
1.3
Shader Model
N/A
6.8
CUDA
—
8.9
3DMark
id
—
-
▲ Specs Compare
Data sourced from official specifications and benchmark tests.