Those are moving rainbow colors on my CPU fan and RAM:


But, I put on an opaque cover:
If you want to expose the gay, you need a transparent cover. You can see many at Best Buy.
The left computer has the same type of case as my new computer because I bought the two cases about 20 years ago. The small bay is for a 3.5 inch floppy drive. Whippersnappers don't know what that is.
I am testing my new computer with Linux Mint Cinnamon and everything works well.
Here is a list of parts and the prices I paid:
AMD Ryzen 7 2700X Processor with Wraith Prism LED Cooler - YD270XBGAFBOX $269.00 (no tax, free shipping)
ASUS B450 AMD Ryzen 2 ATX Gaming Motherboard AM4 DDR4 HDMI DVI M.2 USB 3.1 Gen2 (Prime B450-Plus) $89.99 (plus IL tax, free shipping)
EVGA 500 W1, 80+ WHITE 500W, 3 Year Warranty, Power Supply 100-W1-0500-KR, Black $24.99 (plus IL tx, free shipping)
WD Blue 3D NAND 500GB PC SSD - SATA III 6 Gb/s, 2.5"/7mm - WDS500G2B0A $79.99 (plus IL tx, free shipping)
G.SKILL TridentZ RGB Series 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) Desktop Memory Model F4-3200C16D-16GTZR $139.99 (free shipping, plus IL tax)
Case, chassis fan, monitor, DVD drive and graphics card were on hand.
Currently on order, I will put in this graphics card:
EVGA GeForce GT 1030 DDR4, 02G-P4-6232-KR, 2GB SDDR4, Passive, Low Profile $77.99 each (no tax, $9.38 shipping)
and this operating system:
MICROSOFT WINDOWS 10 PRO PROFESSIONAL 32-BIT&64-BIT OEM FULL VERSION $45 (free shipping and no tax)
Approximate total cost = $750
Questions?