AMD Radeon RX 455 OEM vs NVIDIA B300
GPU Specs Compare
Graphics Card
Release Date
Jun 2016
Sep 2025
Generation
Arctic Islands
Server Blackwell
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 5.0 x16
Clock Speeds
Memory Clock
1625 MHz
2000 MHz
Base Clock
-
1665 MHz
Boost Clock
-
2032 MHz
Memory
Memory Size
2GB
144GB
Memory Type
GDDR5
HBM3e
Memory Bus
128bit
4096bit
Bandwidth
104.0GB/s
4.10TB/s
Render Config
Compute Units
12
-
Shading Units
768
18944
TMUs
48
592
ROPs
16
24
L1 Cache
16 KB (per CU)
256 KB (per SM)
L2 Cache
256 KB
50 MB
SM Count
-
148
Tensor Cores
-
592
Theoretical Performance
Pixel Rate
16.80 GPixel/s
48.77 GPixel/s
Texture Rate
50.40 GTexel/s
1202.9 GTexel/s
FP32 (float)
1.613 TFLOPS
76.99 TFLOPS
FP64 (double)
100.8 GFLOPS
1202.9 GFLOPS
FP16 (half)
-
1231.8 TFLOPS
Graphics Processor
GPU Name
Tobago
GB110
GPU Variant
Tobago PRO(215-0875010)
-
Architecture
GCN 2.0
Blackwell Ultra
Foundry
TSMC
TSMC
Process Size
28 nm
5 nm
Transistors
2.08 billion
104 billion
Die Size
160 mm²
Unknown
Board Design
TDP
100W
1400W
Suggested PSU
300 W
1800 W
Outputs
1x DVI1x HDMI 1.4a1x DisplayPort 1.2
No outputs
Power Connectors
1x 6-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