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