This is my old PC I originally built in 2009, when I was only twelve years old.
CPU: It's quite ancient nowadays, Even an Athlon 750k outperforms it in pretty much every task. It's still just enough for most things though.
Mobo: It has a lot of Sata II ports and no Sata III. It wasn't a bad motherboard at the time, and it has continued to work well.
Memory: 4x4 configuration is weird. I think someone gave me it though. I don't remember who. It works.
HDD: It originally had a 1tb WD Green 10EADS that finally failed. I replaced it with this one. It's much nicer than the old one.
SSD: I got this for only $50 on sale. I'm running it on Sata II and it's still quite fast. This PC does not feel slow at all to use.
GPU: It's about the equivelant of a GTX 750 or R7-250x nowadays. I think the fan is wearing out because it's much louder than I remember it being. It can do GTA V at 45fps on high settings at 900p (shocking!)
Case: I hate this case. I bought it recently because my old one had a broken side panel. It's OK to work in, and is built OK. However, its cable management is very tight, it scratches easily, is a fingerprint magnet, and the hard drive sleighs are abominable. Even with extra fans it has very poor airflow. I will be replacing it with an N200 soon.