NVIDIA RTX PRO 4000 Blackwell SFF vs AMD Radeon RX 550X Mobile
GPU Specs Compare
Graphics Card
Release Date
Aug 2025
Apr 2018
Generation
Blackwell PRO W
Mobility Radeon
Type
Desktop
Mobile
Bus Interface
PCIe 5.0 x8
PCIe 3.0 x8
Clock Speeds
Base Clock
577 MHz
1100 MHz
Boost Clock
1432 MHz
1176 MHz
Memory Clock
1125 MHz
1500 MHz
Memory
Memory Size
24GB
2GB
Memory Type
GDDR7
GDDR5
Memory Bus
192bit
64bit
Bandwidth
432.0GB/s
48.00GB/s
Render Config
SM Count
70
-
Shading Units
8960
640
TMUs
280
40
ROPs
96
16
Tensor Cores
280
-
RT Cores
70
-
L1 Cache
128 KB (per SM)
16 KB (per CU)
L2 Cache
48 MB
512 KB
Compute Units
-
10
Theoretical Performance
Pixel Rate
137.5 GPixel/s
18.82 GPixel/s
Texture Rate
401.0 GTexel/s
47.04 GTexel/s
FP16 (half)
25.66 TFLOPS
1.505 TFLOPS
FP32 (float)
25.66 TFLOPS
1.505 TFLOPS
FP64 (double)
401.0 GFLOPS
94.08 GFLOPS
Graphics Processor
GPU Name
GB203
Polaris 23
Architecture
Blackwell 2.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
5 nm
14 nm
Transistors
45.6 billion
2.2 billion
Die Size
378 mm²
103 mm²
GPU Variant
-
Polaris 23 MXT
Board Design
TDP
70W
50W
Suggested PSU
250 W
-
Outputs
4x mini-DisplayPort 2.1b
No outputs
Power Connectors
None
None
Graphics Features
DirectX
12 Ultimate (12_2)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
3.0
2.1
Vulkan
1.4
1.2
CUDA
12.0
-
Shader Model
6.8
6.4