This build is the twin brother build of my friend Jacob's jgperson Hackintosh G5 Mod that we built together. While out two builds are very similar, they have some key personal preference differences.
Here's the link to my completed build video: http://mcmx.in/2vQ7r40
I called up Jacob one day and pitched this crazy idea to him about completely custom modding a PowerMac G5 case for PC components, water-cooling it, and making it a Hackintosh/awesome gaming PC (dual-boot to Windows). You can see our build process and photos of modding here.
I chose to go with powder coating for my case (over spray paint), which has its ups and downs. Powder coating on this case looks phenomenally stunning. The problem is that in certain places it becomes too thick for certain parts of the case to reattach such as, the side panel, the latch on the backside to keep the side panel attached. All of this was remedied with a little wet sanding to decrease the thickness in certain areas, but I feel that even an auto body paint job would have looked just as clean, without the added issues of thickness. But I'm very happy with the powder coat job here.
We also each cut a window slot into the side panel. Originally we both went with acrylic mounted on the backside with some double-sided emblem tape, but I found a local glass company that mounted actual 3/8-inch glass in it for only $25! Pretty sweet and the difference is night/day from the acrylic. Nothing beats real glass. I won't go into the entire assembly/disassembly process here as Jacob's post (linked above) really showcases that process in text/photos.
Getting all of the components organized and cable managed inside of the case was probably the biggest issue. Since the PowerMac G5 was custom cable managed through cable channels and other tricks from Apple, the only option here was to try and do the same. I was able to get most of the cables under the motherboard (it's mounted on standoffs which raise it up quite a bit to properly sit in the case).
I also kept a lot of the original components inside of the case such as the rear fan mounts, hard drive bay, and front I/O panel. Speaking of which, we were able to find someone online that makes special cables to convert the G5 front I/O to fit and work with an ATX motherboard. Worked out great.
Inside of the case, most everything else was a breeze (once thoroughly planned out. The PSU, and Radiator were mounted using industrial strength double sided tape (trust me they aren't going anywhere), plus the tubing really secures it as well. There's no rear I/O shield on this build as it would have been near impossible to secure one in place, but it doesn't bother me. With the water cooling, I went with Navy Blue UV reactive fluid from EK and with some UB lighting the whole thing looks amazing.
This computer works very well for my uses. It's great at gaming, video editing, and everything in-between. Plus, with the water-cooling here, I'm able to get some pretty hefty overclocks on everything (up to 4.0 on the Ryzen 1700), but felt that the performance was actually best at 3.975 GHz because to get to 4 needed much more voltage to the CPU.
Final notes: This was a challenging process. It was SO worth the end result though. This is a build that we are very proud of and I'm glad we stuck to our own personal tastes/preferences to give each one a little extra flair. Between our two schedules it took roughly a month and a half of prepping and building until we had everything complete. The best advice I can give anyone looking to do something like this is to plan, plan, plan. That's the key to success here.