AMD Radeon Pro Vega 20 vs NVIDIA B300 SXM6 AC
GPU Specs Compare
Graphics Card
Release Date
Nov 2018
Sep 2025
Generation
Radeon Pro Mac
Server Blackwell
Type
Mobile
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 6.0 x16
Clock Speeds
Base Clock
815 MHz
1665 MHz
Boost Clock
1283 MHz
2032 MHz
Memory Clock
740 MHz
2000 MHz
Memory
Memory Size
4GB
288GB
Memory Type
HBM2
HBM3e
Memory Bus
1024bit
8192bit
Bandwidth
189.4GB/s
8.19TB/s
Render Config
Compute Units
20
-
Shading Units
1280
18944
TMUs
80
592
ROPs
32
24
L1 Cache
16 KB (per CU)
256 KB (per SM)
L2 Cache
1024 KB
126 MB
SM Count
-
148
Tensor Cores
-
592
Theoretical Performance
Pixel Rate
41.06 GPixel/s
48.77 GPixel/s
Texture Rate
102.6 GTexel/s
1202.9 GTexel/s
FP16 (half)
6.569 TFLOPS
76.99 TFLOPS
FP32 (float)
3.284 TFLOPS
76.99 TFLOPS
FP64 (double)
205.3 GFLOPS
1202.9 GFLOPS
Graphics Processor
GPU Name
Vega 12
GB110
GPU Variant
Vega 12 XTA
-
Architecture
GCN 5.0
Blackwell Ultra
Foundry
GlobalFoundries
TSMC
Process Size
14 nm
5 nm
Transistors
Unknown
208 billion
Die Size
Unknown
1628 mm²
Board Design
TDP
100W
1100W
Outputs
No outputs
No outputs
Suggested PSU
-
1500 W
Graphics Features
DirectX
12 (12_1)
N/A
OpenGL
4.6
N/A
OpenCL
2.1
3.0
Vulkan
1.2
N/A
Shader Model
6.3
N/A
CUDA
-
10.3
📊 Benchmark
3DMark Time Spy
2,596
-
3DMark Time Spy Extreme
1,211
-