NVIDIA B300 vs AMD Radeon R9 280X
GPU Specs Compare
Graphics Card
Release Date
Sep 2025
Oct 2013
Generation
Server Blackwell
Volcanic Islands
Type
Desktop
Desktop
Bus Interface
PCIe 5.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1665 MHz
850 MHz
Boost Clock
2032 MHz
1000 MHz
Memory Clock
2000 MHz
1500 MHz
Memory
Memory Size
144GB
3GB
Memory Type
HBM3e
GDDR5
Memory Bus
4096bit
384bit
Bandwidth
4.10TB/s
288.0GB/s
Render Config
SM Count
148
-
Shading Units
18944
2048
TMUs
592
128
ROPs
24
32
Tensor Cores
592
-
L1 Cache
256 KB (per SM)
16 KB (per CU)
L2 Cache
50 MB
768 KB
Compute Units
-
32
Theoretical Performance
Pixel Rate
48.77 GPixel/s
32.00 GPixel/s
Texture Rate
1202.9 GTexel/s
128.0 GTexel/s
FP16 (half)
1231.8 TFLOPS
-
FP32 (float)
76.99 TFLOPS
4.096 TFLOPS
FP64 (double)
1202.9 GFLOPS
1024 GFLOPS
Graphics Processor
GPU Name
GB110
Tahiti
Architecture
Blackwell Ultra
GCN 1.0
Foundry
TSMC
TSMC
Process Size
5 nm
28 nm
Transistors
104 billion
4.313 billion
Die Size
Unknown
352 mm²
GPU Variant
-
Tahiti XTL(215-0821065)
Board Design
TDP
1400W
250W
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 (11_1)
OpenGL
N/A
4.6
OpenCL
3.0
1.2
Vulkan
N/A
1.2
CUDA
10.3
-
Shader Model
N/A
5.1