NVIDIA B300 vs AMD Radeon RX 6650 XT
GPU Specs Compare
Graphics Card
Release Date
Sep 2025
May 2022
Generation
Server Blackwell
Navi II
Type
Desktop
Desktop
Bus Interface
PCIe 5.0 x16
PCIe 4.0 x8
Clock Speeds
Base Clock
1665 MHz
2055 MHz
Boost Clock
2032 MHz
2635 MHz
Memory Clock
2000 MHz
2190 MHz
Memory
Memory Size
144GB
8GB
Memory Type
HBM3e
GDDR6
Memory Bus
4096bit
128bit
Bandwidth
4.10TB/s
280.3GB/s
Render Config
SM Count
148
-
Shading Units
18944
2048
TMUs
592
128
ROPs
24
64
Tensor Cores
592
-
L1 Cache
256 KB (per SM)
128 KB per Array
L2 Cache
50 MB
2 MB
Compute Units
-
32
RT Cores
-
32
L3 Cache
-
32 MB
Theoretical Performance
Pixel Rate
48.77 GPixel/s
168.6 GPixel/s
Texture Rate
1202.9 GTexel/s
337.3 GTexel/s
FP16 (half)
1231.8 TFLOPS
21.59 TFLOPS
FP32 (float)
76.99 TFLOPS
10.79 TFLOPS
FP64 (double)
1202.9 GFLOPS
674.6 GFLOPS
Graphics Processor
GPU Name
GB110
Navi 23
Architecture
Blackwell Ultra
RDNA 2.0
Foundry
TSMC
TSMC
Process Size
5 nm
7 nm
Transistors
104 billion
11.06 billion
Die Size
Unknown
237 mm²
GPU Variant
-
Navi 23 KXT(215-130000136)
Board Design
TDP
1400W
176W
Suggested PSU
1800 W
450 W
Outputs
No outputs
1x HDMI 2.13x DisplayPort 1.4a
Power Connectors
-
1x 8-pin
Graphics Features
DirectX
N/A
12 Ultimate (12_2)
OpenGL
N/A
4.6
OpenCL
3.0
2.1
Vulkan
N/A
1.3
CUDA
10.3
-
Shader Model
N/A
6.5