The P620 and RX580 were two different graphics cards. The P620 was a professional graphics card that was mainly used in industrial design, video production, and other fields. It used the Nvidia's Quadro P620 CPU, with 512 CPU cores and 2GB of GDDIR5 memory. It also supported 4K resolution and multi-monitor output. The RX580 was a gaming graphics card, mainly used for games and entertainment. It had higher floating-point performance, a higher pixel-rate, and texture-rate, as well as greater Vram and memory processing speed. Therefore, whether you choose the P620 or RX580 depends on your needs and usage. If you need to do professional work, such as industrial design or video production, then the P620 might be more suitable for you. If your main focus is on gaming and entertainment, then the RX580 might be a better choice.
RX 100 might be a product name. If it's a camera, it's well - known for its compact size and excellent performance. It's popular among photography enthusiasts who want a portable device without sacrificing too much on quality.
I'm not sure specifically which 'rx100' you are referring to. It could be a model of a camera, like the Sony RX100 series. If it's that, the RX100 cameras are known for their compact size yet high - quality imaging capabilities. They are popular among photography enthusiasts who want a portable device for various shooting situations, from casual snapshots to more serious photography on the go.