NVIDIA RTX 4000 SFF Ada Generation vs NVIDIA B300
GPU Specs Compare
Graphics Card
Release Date
Nov 2018
Sep 2025
Generation
Radeon Instinct
Server Blackwell
Type
Professional
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 5.0 x16
Clock Speeds
Base Clock
1200 MHz
1665 MHz
Boost Clock
1746 MHz
2032 MHz
Memory Clock
1000 MHz
2000 MHz
Memory
Memory Size
16GB
144GB
Memory Type
HBM2
HBM3e
Memory Bus
4096bit
4096bit
Bandwidth
1.02TB/s
4.10TB/s
Render Config
SM Count
48
148
Compute Units
60
-
Shading Units
3840
18944
TMUs
240
592
ROPs
64
24
Tensor Cores
192
592
RT Cores
48
-
L1 Cache
16 KB (per CU)
256 KB (per SM)
L2 Cache
4 MB
50 MB
Theoretical Performance
Pixel Rate
111.7 GPixel/s
48.77 GPixel/s
Texture Rate
419.0 GTexel/s
1202.9 GTexel/s
FP16 (half)
26.82 TFLOPS
1231.8 TFLOPS
FP32 (float)
13.41 TFLOPS
76.99 TFLOPS
FP64 (double)
6.705 TFLOPS
1202.9 GFLOPS
Graphics Processor
GPU Name
Vega 20
GB110
GPU Variant
Vega 20 GLXT
-
Architecture
GCN 5.1
Blackwell Ultra
Foundry
TSMC
TSMC
Process Size
7 nm
5 nm
Transistors
13.23 billion
104 billion
Die Size
331 mm²
Unknown
Board Design
TDP
300W
1400W
Suggested PSU
700 W
1800 W
Outputs
1x mini-DisplayPort 1.4a
No outputs
Power Connectors
2x 8-pin
-
Graphics Features
DirectX
12 (12_1)
N/A
OpenGL
4.6
N/A
OpenCL
2.1
3.0
Vulkan
1.3
N/A
CUDA
8.9
10.3
Shader Model
6.7
N/A