FWIW, this actually comes with a RX580 (per the features) not a RX550 (per the header).
Adding memory is a must; HP’s use of the 2400G means 2 GB of RAM is automatically reserved for the APU, even though it’s not used because this has a separate GPU. Adding a NVMe SSD will make a world of difference versus the stock hard drive too.
Thank you! I’ll ask the computer team to verify and correct if needed.
Update: Updated. 
I’ve received the machine and checked the warranty status with the include HP tool. It says the warranty expires 2/3/2020, which is only 30 days after purchase, not 90, as the listing (and the shipping box) say. Somebody has made a mistake, I hope.
Hi there. Register the computer with HP. That should reset the warranty to you. Warranties are initially set to the seller.
https://register.hp.com/americas/flowPage/registration/index.do?execution=e1s1&cc=US&lang=en