I built this PC primarily to play games like Diablo 3, Elite: Dangerous, and Star Citizen. My goal was to keep the cost low, to have a clean build in a small-ish case, and to improve performance by overclocking the G3258 Pentium Anniversary edition now, while have some upgradability later.
I originally was going to use a Corsair Graphite 380T with a mini-ITX board, and picked up one 8 GB RAM module, rather than a pair so that I could add another 8 GB later. When I decided to switch to a micro-ATX build and case, I ended up with four slots, rather than too, so would have been better off with 2x4 GB.
The case is great for cable management, and I really like the looks of it and the excellent airflow properties. I did have to squeeze the power cable for the Radeon R9 270X in a bit - it is touching the window, which I expect I'll pay for in the future. Maybe I'll get lucky and won't.
I can't say how happy I am with the G3258. At stock speeds it's playing D3 like a champ, which I expected it to. I wasn't sure about ED though, since the recommended (though vague) specs are for a quad-core CPU. I have had no problems running at stock speeds.
The fans are nice and quiet, and the Seidon 120V has way more cooling capacity than the processor needs at stock clock. At 3.2 GHz idle temps hover around 30 C, and 35 C under load.
I've spent a fair bit of time working on overclocking this build, as it is my first time overclocking. It's been a time consuming process, and by now I probably should have just spent a bit more on a better CPU. I was going carefully, since it is my first time with this process. I just finished a 24 hour stress test at 4.4 GHz, and expect that I can get a bit more performance out of the rig. I had about an 11 hour test before hitting an error at 4.5 GHz and decided to dial back the speed a bit to get stable before pushing forward.
At 4.4 GHz, temps average 63 C or so under load according to RealTemp.
Update 3/19/2015 Unfortunately the CPU cooler pump stopped working about a month ago. I contacted CoolerMaster support and am undergoing the RMA process. Support has been helpful and good to work with. They're experiencing warehouse delays which are frustrating, but otherwise I am happy with the support I'm getting. I'll update when I get a replacement, as it sounds like the Seidon 120V isn't stocked and I'll get a Nepton 120XL instead.