NVIDIA RTX PRO 4000 Blackwell SFF vs NVIDIA RTX A6000
GPU · Specs Compare
Graphics Card
Release Date
Aug 2025
Oct 2020
Generation
Blackwell PRO W
Quadro Ampere
Type
Desktop
Professional
Bus Interface
PCIe 5.0 x8
PCIe 4.0 x16
Clock Speeds
Base Clock
577 MHz
1410 MHz
Boost Clock
1432 MHz
1800 MHz
Memory Clock
1125 MHz
2000 MHz
Memory
Memory Size
24GB
48GB
Memory Type
GDDR7
GDDR6
Memory Bus
192bit
384bit
Bandwidth
432.0GB/s
768.0GB/s
Render Config
SM Count
70
84
Shading Units
8960
10752
TMUs
280
336
ROPs
96
112
Tensor Cores
280
336
RT Cores
70
84
L1 Cache
128 KB (per SM)
128 KB (per SM)
L2 Cache
48 MB
6 MB
Theoretical Performance
Pixel Rate
137.5 GPixel/s
201.6 GPixel/s
Texture Rate
401.0 GTexel/s
604.8 GTexel/s
FP16 (half)
25.66 TFLOPS
38.71 TFLOPS
FP32 (float)
25.66 TFLOPS
38.71 TFLOPS
FP64 (double)
401.0 GFLOPS
604.8 GFLOPS
Graphics Processor
GPU Name
GB203
GA102
Architecture
Blackwell 2.0
Ampere
Foundry
TSMC
Samsung
Process Size
5 nm
8 nm
Transistors
45.6 billion
28.3 billion
Die Size
378 mm²
628 mm²
Board Design
TDP
70W
300W
Suggested PSU
250 W
700 W
Outputs
4x mini-DisplayPort 2.1b
4x DisplayPort 1.4a
Power Connectors
None
8-pin EPS
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
Benchmark
3DMark Time Spy
—
17,742
3DMark Time Spy Extreme
—
9,324
OctaneBench
—
600
3DMark Speed Way
—
4,965
Blender
—
5,387
▲ Specs Compare
Data sourced from official specifications and benchmark tests.