AMD Radeon Instinct MI455X vs NVIDIA RTX PRO 4000 Blackwell SFF
GPU Specs Compare
Graphics Card
Release Date
Jul 2026
Aug 2025
Generation
Radeon Instinct
Blackwell PRO W
Type
Desktop
Desktop
Bus Interface
PCIe 6.0 x16
PCIe 5.0 x8
Clock Speeds
Base Clock
1000 MHz
577 MHz
Boost Clock
2400 MHz
1432 MHz
Memory Clock
1900 MHz
1125 MHz
Memory
Memory Size
432GB
24GB
Memory Type
HBM4
GDDR7
Memory Bus
24576bit
192bit
Bandwidth
23.3TB/s
432.0GB/s
Render Config
Compute Units
256
-
Shading Units
32768
8960
TMUs
1024
280
ROPs
0
96
L1 Cache
32 KB (per CU)
128 KB (per SM)
L2 Cache
192 MB
48 MB
SM Count
-
70
Tensor Cores
-
280
RT Cores
-
70
Theoretical Performance
Pixel Rate
0 MPixel/s
137.5 GPixel/s
Texture Rate
2457.6 GTexel/s
401.0 GTexel/s
FP16 (half)
157.3 TFLOPS
25.66 TFLOPS
FP32 (float)
157.3 TFLOPS
25.66 TFLOPS
FP64 (double)
2.458 TFLOPS
401.0 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
GB203
Architecture
CDNA 5.0
Blackwell 2.0
Foundry
TSMC
TSMC
Process Size
2 nm
5 nm
Transistors
320 billion
45.6 billion
Die Size
Unknown
378 mm²
Board Design
TDP
2300W
70W
Suggested PSU
2700 W
250 W
Outputs
No outputs
4x mini-DisplayPort 2.1b
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
1.4
Shader Model
N/A
6.8
CUDA
-
12.0