NVIDIA B300 vs AMD Radeon R9 390
GPU · Specs Compare
Graphics Card
Release Date
Sep 2025
Jun 2015
Generation
Server Blackwell
Pirate Islands
Type
Desktop
Desktop
Bus Interface
PCIe 5.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1665 MHz
—
Boost Clock
2032 MHz
—
Memory Clock
2000 MHz
1500 MHz
Memory
Memory Size
144GB
8GB
Memory Type
HBM3e
GDDR5
Memory Bus
4096bit
512bit
Bandwidth
4.10TB/s
384.0GB/s
Render Config
SM Count
148
—
Shading Units
18944
2560
TMUs
592
160
ROPs
24
64
Tensor Cores
592
—
L1 Cache
256 KB (per SM)
16 KB (per CU)
L2 Cache
50 MB
1024 KB
Compute Units
—
40
Theoretical Performance
Pixel Rate
48.77 GPixel/s
64.00 GPixel/s
Texture Rate
1202.9 GTexel/s
160.0 GTexel/s
FP16 (half)
1231.8 TFLOPS
—
FP32 (float)
76.99 TFLOPS
5.120 TFLOPS
FP64 (double)
1202.9 GFLOPS
640.0 GFLOPS
Graphics Processor
GPU Name
GB110
Grenada
Architecture
Blackwell Ultra
GCN 2.0
Foundry
TSMC
TSMC
Process Size
5 nm
28 nm
Transistors
104 billion
6.2 billion
Die Size
Unknown
438 mm²
GPU Variant
—
Grenada PRO(215-0880030)
Board Design
TDP
1400W
275W
Suggested PSU
1800 W
600 W
Outputs
No outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
—
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
N/A
12 (12_0)
OpenGL
N/A
4.6
OpenCL
3.0
2.0
Vulkan
N/A
1.2
CUDA
10.3
—
Shader Model
N/A
6.3
Benchmark
3DMark Time Spy
—
3,964
3DMark Time Spy Extreme
—
1,931
▲ Specs Compare
Data sourced from official specifications and benchmark tests.