AMD Radeon R9 280X vs NVIDIA B300 SXM6 AC
GPU Specs Compare
Graphics Card
Release Date
Oct 2013
Sep 2025
Generation
Volcanic Islands
Server Blackwell
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 6.0 x16
Clock Speeds
Base Clock
850 MHz
1665 MHz
Boost Clock
1000 MHz
2032 MHz
Memory Clock
1500 MHz
2000 MHz
Memory
Memory Size
3GB
288GB
Memory Type
GDDR5
HBM3e
Memory Bus
384bit
8192bit
Bandwidth
288.0GB/s
8.19TB/s
Render Config
Compute Units
32
-
Shading Units
2048
18944
TMUs
128
592
ROPs
32
24
L1 Cache
16 KB (per CU)
256 KB (per SM)
L2 Cache
768 KB
126 MB
SM Count
-
148
Tensor Cores
-
592
Theoretical Performance
Pixel Rate
32.00 GPixel/s
48.77 GPixel/s
Texture Rate
128.0 GTexel/s
1202.9 GTexel/s
FP32 (float)
4.096 TFLOPS
76.99 TFLOPS
FP64 (double)
1024 GFLOPS
1202.9 GFLOPS
FP16 (half)
-
76.99 TFLOPS
Graphics Processor
GPU Name
Tahiti
GB110
GPU Variant
Tahiti XTL(215-0821065)
-
Architecture
GCN 1.0
Blackwell Ultra
Foundry
TSMC
TSMC
Process Size
28 nm
5 nm
Transistors
4.313 billion
208 billion
Die Size
352 mm²
1628 mm²
Board Design
TDP
250W
1100W
Suggested PSU
600 W
1500 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
No outputs
Power Connectors
1x 6-pin + 1x 8-pin
-
Graphics Features
DirectX
12 (11_1)
N/A
OpenGL
4.6
N/A
OpenCL
1.2
3.0
Vulkan
1.2
N/A
Shader Model
5.1
N/A
CUDA
-
10.3