NVIDIA RTX PRO 4000 Blackwell SFF vs NVIDIA RTX A4 Mobile
GPU Specs Compare
Graphics Card
Release Date
Aug 2025
Apr 2021
Generation
Blackwell PRO W
Quadro Ampere-M
Type
Desktop
Professional
Bus Interface
PCIe 5.0 x8
PCIe 4.0 x8
Clock Speeds
Base Clock
577 MHz
1297 MHz
Boost Clock
1432 MHz
1770 MHz
Memory Clock
1125 MHz
1750 MHz
Memory
Memory Size
24GB
4GB
Memory Type
GDDR7
GDDR6
Memory Bus
192bit
128bit
Bandwidth
432.0GB/s
224.0GB/s
Render Config
SM Count
70
16
Shading Units
8960
2048
TMUs
280
64
ROPs
96
32
Tensor Cores
280
64
RT Cores
70
16
L1 Cache
128 KB (per SM)
128 KB (per SM)
L2 Cache
48 MB
2 MB
Theoretical Performance
Pixel Rate
137.5 GPixel/s
56.64 GPixel/s
Texture Rate
401.0 GTexel/s
113.3 GTexel/s
FP16 (half)
25.66 TFLOPS
7.250 TFLOPS
FP32 (float)
25.66 TFLOPS
7.250 TFLOPS
FP64 (double)
401.0 GFLOPS
113.3 GFLOPS
Graphics Processor
GPU Name
GB203
GA107
Architecture
Blackwell 2.0
Ampere
Foundry
TSMC
Samsung
Process Size
5 nm
8 nm
Transistors
45.6 billion
8.7 billion
Die Size
378 mm²
200 mm²
Board Design
TDP
70W
Unknown
Suggested PSU
250 W
-
Outputs
4x mini-DisplayPort 2.1b
Portable Device Dependent
Power Connectors
None
None
Graphics Features
DirectX
12 Ultimate (12_2)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
3.0
3.0
Vulkan
1.4
1.3
CUDA
12.0
8.6
Shader Model
6.8
6.7