NVIDIA B300 vs AMD Radeon 660M
GPU · Specs Compare
Graphics Card
Release Date
Sep 2025
Jan 2022
Generation
Server Blackwell
Rembrandt
Type
Desktop
Integrated
Bus Interface
PCIe 5.0 x16
PCIe 4.0 x8
Clock Speeds
Base Clock
1665 MHz
1500 MHz
Boost Clock
2032 MHz
1900 MHz
Memory Clock
2000 MHz
System Shared
Memory
Memory Size
144GB
System Shared
Memory Type
HBM3e
System Shared
Memory Bus
4096bit
System Shared
Bandwidth
4.10TB/s
System Dependent
Render Config
SM Count
148
—
Shading Units
18944
384
TMUs
592
24
ROPs
24
16
Tensor Cores
592
—
L1 Cache
256 KB (per SM)
128 KB per Array
L2 Cache
50 MB
2 MB
Compute Units
—
6
RT Cores
—
6
Theoretical Performance
Pixel Rate
48.77 GPixel/s
30.40 GPixel/s
Texture Rate
1202.9 GTexel/s
45.60 GTexel/s
FP16 (half)
1231.8 TFLOPS
2.918 TFLOPS
FP32 (float)
76.99 TFLOPS
1459 GFLOPS
FP64 (double)
1202.9 GFLOPS
91.20 GFLOPS
Graphics Processor
GPU Name
GB110
Rembrandt
Architecture
Blackwell Ultra
RDNA 2.0
Foundry
TSMC
TSMC
Process Size
5 nm
6 nm
Transistors
104 billion
13.1 billion
Die Size
Unknown
210 mm²
Board Design
TDP
1400W
15W
Suggested PSU
1800 W
—
Outputs
No outputs
No outputs
Power Connectors
—
None
Graphics Features
DirectX
N/A
12 Ultimate (12_2)
OpenGL
N/A
4.6
OpenCL
3.0
2.0
Vulkan
N/A
1.2
CUDA
10.3
—
Shader Model
N/A
6.5
Benchmark
3DMark Time Spy
—
1,537
3DMark Time Spy Extreme
—
701
▲ Specs Compare
Data sourced from official specifications and benchmark tests.