PC build
FE9 Nano-Flagship RTX 5090 & Ryzen 9 9800X3D SFF Build
This high-performance, ultra-compact gaming build pairs the AMD Ryzen 7 9800X3D with the NVIDIA RTX 5090 in a 5L Mini-ITX chassis. The build aims for extre
Component prices & shopping links
0 recent in-stock offers · 3 last seen prices. The subtotal excludes parts without a recorded price. Last seen prices remain visible until a newer observation replaces them. GST inclusion depends on the merchant; shipping is separate.
| Part | Component | AUD price & shopping |
|---|---|---|
| cpu | AMD Ryzen 7 9800X3D | $599.00 Last seenOct 24, 2026, 2:30 PM UTCCurrent price and stock need a new check.Confirm variant, stock, shipping and tax at checkout. |
| gpu | NVIDIA GeForce RTX 5090 Founders Edition | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
| motherboard | Colorful iGame B850I MINI OC V14 | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
| ram | SK hynix DDR5 16Gb A-die "Green" OEM UDIMM | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
| storage | BIWIN Black Opal X570 2TB PCIe Gen5 NVMe SSD | $499.00 Last seenOct 13, 2026, 2:15 AM UTCOut of stock at the last check.Confirm variant, stock, shipping and tax at checkout. |
| psu | ASUS ROG Loki SFX-L 1000W Platinum | $379.00 Last seenOct 13, 2026, 2:15 AM UTCOut of stock at the last check.Confirm variant, stock, shipping and tax at checkout. |
| case | FE9 Mini ITX PC Case | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
| cooler | ID-COOLING IS-47-XT Low-Profile CPU Air Cooler | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
What this build is good for
This high-performance, ultra-compact gaming build pairs the AMD Ryzen 7 9800X3D with the NVIDIA RTX 5090 in a 5L Mini-ITX chassis. The build aims for extreme portability and flagship gaming capabilities. However, the system faces severe thermal constraints; the ID-COOLING IS-47-XT is rated for 95W TDP, significantly below the processor's 120W TDP, which will likely lead to thermal throttling under load. Additionally, the OEM 'green' RAM lacks XMP/EXPO profiles, requiring manual BIOS tuning for stability and performance. The 1000W ROG Loki PSU is well-matched for the RTX 5090, providing modern ATX 3.1 connectivity and sufficient power headroom for a small form factor environment. Building in a 5L enclosure requires meticulous cable management and airflow planning.
- Thermal throttling risk due to mismatched CPU cooler TDP
- Extreme difficulty in cable management within 5L volume
- Manual RAM tuning required for performance
- Limited M.2 storage options
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Useful next steps
Upgrade CPU Cooler
The ID-COOLING IS-47-XT (95W TDP) is insufficient for the 120W TDP of the Ryzen 7 9800X3D. A higher-performance low-profile cooler is required to mitigate thermal throttling.
Use EXPO-certified RAM
The current OEM RAM lacks profiles for plug-and-play speeds. Switching to a retail DDR5 kit with AMD EXPO support will simplify stability and performance tuning.