Small form factor (≤25L) gaming PC build
A build that fits in a case under 25 litres — desk-friendly, and comfortable at 1080p.
Total and expected performance
| Total (JP prices) | ¥233,287 |
|---|---|
| Tier | Standard — ~100fps at 1080p high. Streaming and photo editing are fine |
| PassMark | CPU 28,069 / GPU 16,437 |
| Power | Peak load 272W / recommended 450W / PSU in this build 600W |
Parts
| Category | Part | Key specs | Price | Price source |
|---|---|---|---|---|
| CPU | Ryzen 5 9500F | Socket AM5 / 6コア / TDP 65W | ¥27,700 | 価格.com（09-12） |
| CPU cooler | Thermalright Peerless Assassin 140デジタルホワイトCPUクーラー | Air / 165mm tall | ¥10,101 | Amazon.co.jp |
| Motherboard | Asus PRIME A620M-K-CSM | AM5 / A620M / Micro ATX | ¥11,800 | 価格.com（09-12） |
| Graphics card | Radeon RX 6600 XT | VRAM 8GB / TDP 160W | ¥44,180 | 価格.com（09-12） |
| Memory | Corsair Vengeance 32 GB | 32GB / DDR5 / 4800MT/s | ¥63,800 | Yahoo!ショッピング（09-10） |
| SSD | Patriot P300 (Phison E13) 1 TB | 1000GB / PCIe 3.0 x4 / M.2 2280 | ¥25,833 | 楽天市場（09-10） |
| Power supply | Thermaltake Toughpower SFX 600W Gold | 600W / GOLD / SFX | ¥39,800 | 価格.com（09-09） |
| Case | JONSBO C6 MAX ブラック Micro ATX PCケース | GPU ≤335mm / 20.8L | ¥10,073 | Amazon.co.jp |
Prices are actual Japanese retail prices with the capture date. Check each shop for stock and current pricing. Amazon links are affiliate links.
Why these parts
- SFF builds fail on card length, cooler height and PSU format — cases with known dimensions come first.
- Some cases take SFX power supplies only; check that item in the build check.
- Thermal headroom is small, so step the cooler up if you want it quiet.
Best for: For tight spaces or LAN parties
Build check
24 checks run automatically (socket, memory, slots, clearances, power). 15 pass and 0 fail in this build.
| Verdict | Check | Detail |
|---|---|---|
| ? | CPU cooler socket support | No socket-support data for this cooler／Check that the cooler supports AM5. Most AM4 mounting kits also fit AM5 |
| ? | Graphics card length | GPU length is unknown／Check the product dimensions |
| ? | Air cooler height | case clearance is unknown／Check the product dimensions |
| ? | PSU length | PSU length is unknown／Check the product dimensions |
| ? | Memory vs air cooler clearance | No heatsink-height data for the memory／Large air coolers can hit tall memory heatsinks; check the cooler's RAM clearance |
“?” means the data needed for that check is missing. We don't call unknown things fine — check the product page.
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