NVIDIA B300 vs NVIDIA RTX A4000 Mobile
GPU Specs Compare
Graphics Card
Release Date
Sep 2025
Apr 2021
Generation
Server Blackwell
Ampere-MW
Type
Desktop
Professional
Bus Interface
PCIe 5.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
1665 MHz
1140 MHz
Boost Clock
2032 MHz
1680 MHz
Memory Clock
2000 MHz
1500 MHz
Memory
Memory Size
144GB
8GB
Memory Type
HBM3e
GDDR6
Memory Bus
4096bit
256bit
Bandwidth
4.10TB/s
384.0GB/s
Render Config
SM Count
148
40
Shading Units
18944
5120
TMUs
592
160
ROPs
24
80
Tensor Cores
592
160
L1 Cache
256 KB (per SM)
128 KB (per SM)
L2 Cache
50 MB
4 MB
RT Cores
-
40
Theoretical Performance
Pixel Rate
48.77 GPixel/s
134.4 GPixel/s
Texture Rate
1202.9 GTexel/s
268.8 GTexel/s
FP16 (half)
1231.8 TFLOPS
17.20 TFLOPS
FP32 (float)
76.99 TFLOPS
17.20 TFLOPS
FP64 (double)
1202.9 GFLOPS
268.8 GFLOPS
Graphics Processor
GPU Name
GB110
GA104
Architecture
Blackwell Ultra
Ampere
Foundry
TSMC
Samsung
Process Size
5 nm
8 nm
Transistors
104 billion
17.4 billion
Die Size
Unknown
392 mm²
Board Design
TDP
1400W
115W
Suggested PSU
1800 W
-
Outputs
No outputs
Portable Device Dependent
Power Connectors
-
None
Graphics Features
DirectX
N/A
12 Ultimate (12_2)
OpenGL
N/A
4.6
OpenCL
3.0
3.0
Vulkan
N/A
1.3
CUDA
10.3
8.6
Shader Model
N/A
6.8
📊 Benchmark
Blender
-
2,825