A:AnswerHello,
The system will be compatible with basically any DDR4 RAM kit you buy, as long as you are using the same RAM sticks in the motherboard. Mixing RAM models may cause compatibility issues.
A:AnswerHello,
You can change the colors of the lights with software! You will have to use a cord with your controller unless you purchase a wireless adapter, as the system does not come with one. The computer comes with wired keyboard and mice, so if you want to use wireless peripherals you would have to purchase your own.
A:AnswerHello,
Yes this system can be upgraded to an RTX 20 series card. The CPU can be upgraded to an i5 or i7, but depending on the generation you may need to upgrade the motherboard as well. You will need a new power supply if you upgrade to a RTX 20 series card.
A:AnswerYou can replace the graphics card, but if you want a better one you'll probably need to up the power supply, and if you want to upgrade the CPU, then you may need a new motherboard depending on what kind, and for future reference the motherboard supplied with this PC is a LGA 1151 motherboard, so you can search up "LGA 1151 CPU's". (Disclaimer: you may also need to upgrade the PSU (power supply) depending on your CPU's TDP (power consumption basically)