AMD Radeon Pro V620 vs NVIDIA B300 SXM6 AC
GPU · Specs Compare
Graphics Card
Release Date
Nov 2021
Sep 2025
Generation
Radeon Pro
Server Blackwell
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 6.0 x16
Clock Speeds
Base Clock
1825 MHz
1665 MHz
Boost Clock
2200 MHz
2032 MHz
Memory Clock
2000 MHz
2000 MHz
Memory
Memory Size
32GB
288GB
Memory Type
GDDR6
HBM3e
Memory Bus
256bit
8192bit
Bandwidth
512.0GB/s
8.19TB/s
Render Config
Compute Units
72
—
Shading Units
4608
18944
TMUs
288
592
ROPs
128
24
RT Cores
72
—
L1 Cache
128 KB per Array
256 KB (per SM)
L2 Cache
4 MB
126 MB
L3 Cache
128 MB
—
SM Count
—
148
Tensor Cores
—
592
Theoretical Performance
Pixel Rate
281.6 GPixel/s
48.77 GPixel/s
Texture Rate
633.6 GTexel/s
1202.9 GTexel/s
FP16 (half)
40.55 TFLOPS
76.99 TFLOPS
FP32 (float)
20.28 TFLOPS
76.99 TFLOPS
FP64 (double)
1267 GFLOPS
1202.9 GFLOPS
Graphics Processor
GPU Name
Navi 21
GB110
GPU Variant
Navi 21 XT(215-121000177)
—
Architecture
RDNA 2.0
Blackwell Ultra
Foundry
TSMC
TSMC
Process Size
7 nm
5 nm
Transistors
26.8 billion
208 billion
Die Size
520 mm²
1628 mm²
Board Design
TDP
300W
1100W
Suggested PSU
700 W
1500 W
Outputs
No outputs
No outputs
Power Connectors
2x 8-pin
—
Graphics Features
DirectX
12 Ultimate (12_2)
N/A
OpenGL
4.6
N/A
OpenCL
2.1
3.0
Vulkan
1.3
N/A
Shader Model
6.5
N/A
CUDA
—
10.3
▲ Specs Compare
Data sourced from official specifications and benchmark tests.