NVIDIA RTX PRO 4000 Blackwell SFF vs NVIDIA GRID K520
GPU · Specs Compare
Graphics Card
Release Date
Aug 2025
Jul 2013
Generation
Blackwell PRO W
GRID
Type
Desktop
Professional
Bus Interface
PCIe 5.0 x8
PCIe 3.0 x16
Clock Speeds
Base Clock
577 MHz
—
Boost Clock
1432 MHz
—
Memory Clock
1125 MHz
1250 MHz
Memory
Memory Size
24GB
4GB
Memory Type
GDDR7
GDDR5
Memory Bus
192bit
256bit
Bandwidth
432.0GB/s
160.0GB/s
Render Config
SM Count
70
—
Shading Units
8960
1536
TMUs
280
128
ROPs
96
32
Tensor Cores
280
—
RT Cores
70
—
L1 Cache
128 KB (per SM)
16 KB (per SMX)
L2 Cache
48 MB
512 KB
Theoretical Performance
Pixel Rate
137.5 GPixel/s
23.84 GPixel/s
Texture Rate
401.0 GTexel/s
95.36 GTexel/s
FP16 (half)
25.66 TFLOPS
—
FP32 (float)
25.66 TFLOPS
2.289 TFLOPS
FP64 (double)
401.0 GFLOPS
95.36 GFLOPS
Graphics Processor
GPU Name
GB203
GK104
Architecture
Blackwell 2.0
Kepler
Foundry
TSMC
TSMC
Process Size
5 nm
28 nm
Transistors
45.6 billion
3.54 billion
Die Size
378 mm²
294 mm²
Board Design
TDP
70W
225W
Suggested PSU
250 W
550 W
Outputs
4x mini-DisplayPort 2.1b
No outputs
Power Connectors
None
1x 8-pin
Graphics Features
DirectX
12 Ultimate (12_2)
12 (11_0)
OpenGL
4.6
4.6
OpenCL
3.0
3.0
Vulkan
1.4
1.1
CUDA
12.0
3.0
Shader Model
6.8
5.1
▲ Specs Compare
Data sourced from official specifications and benchmark tests.