Disclaimer: English is not my mother tongue; please excuse any errors on my part.
1 usd ~ 110 yen.
Intro Never built a PC before, but I was planning it for a while. Since April 2017 I became research student at Tokyo University, Japan. I decided that it is perfect time because I will stay in Japan at least for 2 years. In addition, some problems began with my old laptop. My old 15-inch laptop was mainly stationary, and I am using 12-inch laptop in cases when I need mobility. Also, if I'll go back to my home country, I need something easy to transport. And I wanted to play some new games, make some video-editing and use some mapping software. Gaming laptops are expensive and non-upgradable. So I decided to build mini-ITX PC.
Case Initially I was considering Node 202 case. Smallest affordable case, but then I realized that I will get stuck with 2.5-inch drives and more expensive SFX power supply. Then I find out that there is relatively small case, which supports 3.5-inch drives and full-size ATX power supply. So i compared them:
Node 202 vs Sugo SG-13
10.2 liters vs 11.5 liters
3.5 Kg vs 2.47 Kg
~10000 yen vs ~6000 yen
8700 yen(450W SFX) vs 5400 yen(450W ATX) for PSU
10200 yen(2TB, 5400 rpm, 2.5 inch drive) vs 8000 yen(3TB, 7200, 3.5 inch)
56mm vs 61mm max height of cooler (Both will require aftermarket cooler with CPU, which I have chosen)
So basically Node 202 will cost 9500 yen more, will have less storage and it's only 1.3 liter smaller. Is it worth it? Probably not, so I went for Sugo-SG13B.
CPU Second hardest choice in this build. Ryzen 5 or Core i5? Because of video-editing I preferred Ryzen. At first I was choosing between 1400(21000 yen) and 1500X(25000 yen). 1500X has better stock cooler and higher stock clock speed, but overclocked 1400 has almost same performance. So i decided 1500X is not worth it. Core i5 7400(~23500 yen) and 7500(~25000 yen) probably will be better for gaming purposes, but loses at multi-core performance.
Then I find out that 1600 is just 2000 yen more expensive than 1500X, but has 2 more cores. For 27000 yen you can also buy Core i5 7600, which has slightly better at single-core performance, but completely loses at multi-core performance. So Ryzen 5 1600 seemed more future-proof for my purposes and I decided that it worth to buy for 27000 yen at that time(end of May).
Now prices for Ryzen 1400 and 1500 have slightly decreased and became more reasonable. Maybe now I would choose to buy Ryzen 1400... Who knows?
CPU Cooler Actually, I thought that stock cooler of Ryzen 1600(AMD Wraith Spire) will be enough, at least for a while. On the Internet there are a lot of wrong information about height of Wraith Spire. Some early leaks claimed that Wraith Spire's height is 54 mm. Furthermore, PCpartpicker did not find any issues/incompatibilities. That was huge mistake... It turned out that real height of cooler is way more than 61 mm, which Silverstone recommended for Sugo-SG13B case. 67-68 mm, maybe? Still do not have any ruler to measure it. But somehow I have managed to put all into the case and was using it for a 3 weeks. CPU temperature during gaming was something like 75-80 celsius and ~45 celsius during idle. And it was hella loud, but it worked.
Anyway, I needed some aftermarket cooler. After some researches I found out that there is not a large choice of AM4 coolers in Japan. Best options were CRYORIG C7 (47 mm) air-cooler for 4000 yen and Corsair H60 AIO cooler for 8000 yen. Yes, Corsair is 2 times more expensive than CRYORIG, but all CRYORIG coolers, which sold in Japan, are not AM4-ready. First you need to buy and then contact with support to get AM4 Upgrade Kit. I decided that I am too lazy for it, and extra 4000 yen for more effective and quieter water-cooling seemed worth it. Several days ago I bought Corsair H60 and replaced stock cooler.
Probably, if I went for Ryzen 1400 with Wraith Stealth cooler, which is about 60 mm height, maybe I would have less problems. But 60mm also pretty tight for this case. i think It would be usable, but CPU temperatures definitely will be high.
Important note: If you want to use 3.5-inch hard drive, you are restricted only to 120 mm AIO cooler.
Mobo There is not so much choice for Mini-ITX AM4 mobo. At the moment of build, there were only 2 mobo from Biostar. I went for cheaper B350(13800 yen), because seems like that X370's (15000 yen) features useless for Mini-ITX. I'm not expert, it was just conclusion from reviews that I have read at the moment.
Prices for Kabylake Mini-ITX mobo started from 12500 yen, which seems cheaper. But, actually, it was possible to buy Biostar B350GTN for ~13000 yen at the time on other sites. I just preferred easiest and slightly more expensive way - order on Amazon.co.jp
GPU I was lucky to get 8 GB RX 480 at Yahoo Auction for 21500 yen. RX400-series were sold out and prices just hiked up. I was thinking even buy 1050Ti for 15000 yen, because 1060 3GB prices started from 24000 yen. And, for example, new RX570 4GB prices also started from 24000 yen at the time. So 10-month old 8GB RX480 for 21500 yen seemed for me a good bargain. And this is the only part that was not bought from Amazon.co.jp
RAM I think 1x8GB will be enough for a while. But I'm planning to buy 1 more 8 GB ram stick in the future.
Storage Using old SSD from my laptop. And old 2.5 inch 500GB HDD also from laptop. Probably, next month I will buy new 3 TB hard drive and replace it.
PSU Relatively cheap, semi-modular, good reviews and 140mm length, which also important if you want to install 3.5 inch drive. Of course, it will be better to get full-modular PSU, shorter cables or maybe even SFX PSU. But 140 mm ATX supply is also okay, if you are planning to use water cooling.
Price of build:
Case - 5,900 yen
PSU - 5,424 yen
Mobo - 13,824 yen
CPU - 26,970 yen
RAM - 7,489 yen
GPU - 21,500 yen
Cooler - 8,186 yen
Storage - from old laptop
Total cost at the moment - 89,293 yen ~ 800 usd
Future upgrades: +8 GB RAM, 3 TB HDD and 240 GB NVMe M.2 SSD