The CPU, RAM and Mobo are from a $500 prebuilt PC from China on Ebay, almost 5 years ago. I didn't know how much of a failure that purchase was until a couple years ago, when I finally got into PC gaming. Since then, I've been adding parts - and this is the result.
The only thing that was somewhat decent from that PC was the 2TB Seagate drive. And despite the CPU being decent enough to not bottleneck my GPU, it ran on the 1555 chipset, which means that if I wanted to upgrade any of those 3 essential parts (CPU, Mobo, RAM), I'd have to do all 3 simultaneously.
So until I've saved enough, this is the rig I'm running so far. Obviously, the i5-3570 (which is surprisingly a decent performer) is the CPU, the RAM is a generic single 8GB stick and the motherboard is a bare-bones ASROCK b75.
The GPU is powerful enough to run most games (BF4, Far Cry 3, Watch Dogs, CS:GO) at high-max settings at 1080p, easily sufficient, with temps maxing out around 65C.
The SSD runs my OS and games, and at $125 for 240GB, made an easy choice.
The PSU was definitely a terrible purchase. It's only bronze-certified, for starters, it's cable are flat but are red and yellow on the ends, and it's 750W, way overkill for my rig, even if I decided to throw in another graphics card.
My original case, the one that replaced the Chins PC, was a Define R5, which slowly fell apart over its 3 years of use due to constantly installing parts incorrectly using the incorrect screws. It was also insanely overkill for the mediocre parts I had in it. The P400S, however was well-priced, and matched the tier level my parts were.
I originality had a 120mm AIO but due to incorrect installation (once again), the screw wholes were destroyed and it became redundant. I have then since moved to air-cooling, also greatly improving the aesthetic by standardizing all the fans to quiet-edition SP120 and AF140s. Once my fan splitters arrive, I plan to setup SpeedFan.
So the PC runs, it does the job. And gaming isn't bad. So I'm content. But feel free to suggest upgrades, and check out my partlists where I have compiled a list of parts to upgrade to eventually. That includes upgrading to the skylake chipset.