NVIDIA RTX PRO 4000 Blackwell SFF vs AMD Radeon 660M
GPU Specs Compare
Graphics Card
Release Date
Aug 2025
Jan 2022
Generation
Blackwell PRO W
Rembrandt
Type
Desktop
Integrated
Bus Interface
PCIe 5.0 x8
PCIe 4.0 x8
Clock Speeds
Base Clock
577 MHz
1500 MHz
Boost Clock
1432 MHz
1900 MHz
Memory Clock
1125 MHz
System Shared
Memory
Memory Size
24GB
System Shared
Memory Type
GDDR7
System Shared
Memory Bus
192bit
System Shared
Bandwidth
432.0GB/s
System Dependent
Render Config
SM Count
70
-
Shading Units
8960
384
TMUs
280
24
ROPs
96
16
Tensor Cores
280
-
RT Cores
70
6
L1 Cache
128 KB (per SM)
128 KB per Array
L2 Cache
48 MB
2 MB
Compute Units
-
6
Theoretical Performance
Pixel Rate
137.5 GPixel/s
30.40 GPixel/s
Texture Rate
401.0 GTexel/s
45.60 GTexel/s
FP16 (half)
25.66 TFLOPS
2.918 TFLOPS
FP32 (float)
25.66 TFLOPS
1459 GFLOPS
FP64 (double)
401.0 GFLOPS
91.20 GFLOPS
Graphics Processor
GPU Name
GB203
Rembrandt
Architecture
Blackwell 2.0
RDNA 2.0
Foundry
TSMC
TSMC
Process Size
5 nm
6 nm
Transistors
45.6 billion
13.1 billion
Die Size
378 mm²
210 mm²
Board Design
TDP
70W
15W
Suggested PSU
250 W
-
Outputs
4x mini-DisplayPort 2.1b
No outputs
Power Connectors
None
None
Graphics Features
DirectX
12 Ultimate (12_2)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
3.0
2.0
Vulkan
1.4
1.2
CUDA
12.0
-
Shader Model
6.8
6.5
📊 Benchmark
3DMark Time Spy
-
1,537
3DMark Time Spy Extreme
-
701