NVIDIA B300 vs NVIDIA GeForce RTX 4090
GPU · Specs Compare
Graphics Card
Release Date
Sep 2025
Sep 2022
Generation
Server Blackwell
GeForce 40
Type
Desktop
Desktop
Bus Interface
PCIe 5.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
1665 MHz
2235 MHz
Boost Clock
2032 MHz
2520 MHz
Memory Clock
2000 MHz
1313 MHz
Memory
Memory Size
144GB
24GB
Memory Type
HBM3e
GDDR6X
Memory Bus
4096bit
384bit
Bandwidth
4.10TB/s
1.01TB/s
Render Config
SM Count
148
128
Shading Units
18944
16384
TMUs
592
512
ROPs
24
176
Tensor Cores
592
512
L1 Cache
256 KB (per SM)
128 KB (per SM)
L2 Cache
50 MB
72 MB
RT Cores
—
128
Theoretical Performance
Pixel Rate
48.77 GPixel/s
443.5 GPixel/s
Texture Rate
1202.9 GTexel/s
1290.2 GTexel/s
FP16 (half)
1231.8 TFLOPS
82.58 TFLOPS
FP32 (float)
76.99 TFLOPS
82.58 TFLOPS
FP64 (double)
1202.9 GFLOPS
1290.2 GFLOPS
Graphics Processor
GPU Name
GB110
AD102
Architecture
Blackwell Ultra
Ada Lovelace
Foundry
TSMC
TSMC
Process Size
5 nm
5 nm
Transistors
104 billion
76.3 billion
Die Size
Unknown
609 mm²
GPU Variant
—
AD102-300-A1
Board Design
TDP
1400W
450W
Suggested PSU
1800 W
850 W
Outputs
No outputs
1x HDMI 2.13x DisplayPort 1.4a
Power Connectors
—
1x 16-pin
Graphics Features
DirectX
N/A
12 Ultimate (12_2)
OpenGL
N/A
4.6
OpenCL
3.0
3.0
Vulkan
N/A
1.4
CUDA
10.3
8.9
Shader Model
N/A
6.8
▲ Specs Compare
Data sourced from official specifications and benchmark tests.