PC build
Ultimate RTX 4090 i9-13900K Enthusiast Beast
This high-end PC build centers on an Intel Core i9-13900K and NVIDIA GeForce RTX 4090, offering substantial performance for 4K gaming, multitasking, and pr
Component prices & shopping links
0 recent in-stock offers · 2 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 | Intel Core i9-13900K | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
| gpu | NVIDIA GeForce RTX 4090 | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
| motherboard | ASUS ROG Strix Z790-F Gaming WiFi | $649.00 Last seenOct 24, 2026, 12:00 AM UTCOut of stock at the last check.Confirm variant, stock, shipping and tax at checkout. |
| ram | Generic 32GB DDR5-5600 Desktop Memory Module | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
| storage | Samsung SSD 980 Pro 2TB | $299.00 Last seenOct 25, 2026, 6:05 AM UTCOut of stock at the last check.Confirm variant, stock, shipping and tax at checkout. |
| psu | Corsair RM1000x 80+ Gold | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
| case | Corsair 5000D Airflow Tempered Glass Mid-Tower ATX PC Case | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
| cooler | Corsair iCUE H150i ELITE CAPELLIX XT | Price not recorded yet. Check local retailers below.Confirm variant, stock, shipping and tax at checkout. |
What this build is good for
This high-end PC build centers on an Intel Core i9-13900K and NVIDIA GeForce RTX 4090, offering substantial performance for 4K gaming, multitasking, and professional content creation. The Corsair 5000D Airflow case and H150i ELITE CAPELLIX XT liquid cooler provide a robust thermal foundation. The build utilizes an ATX 3.1 power supply, which is advantageous for providing a native 12V-2x6 connection to the GPU. However, the system contains a critical performance bottleneck: the single-stick 32GB RAM configuration forces the CPU into single-channel memory mode. To achieve the intended system bandwidth and responsiveness, it is essential to replace the current memory with a dual-channel kit (2x16GB or 2x32GB). Provided this memory adjustment is made, the build is highly capable, though users should physically verify the dimensions of their specific RTX 4090 model against the 420mm maximum GPU clearance in the case.
- Single-stick RAM configuration creates a significant memory bandwidth bottleneck.
- Physical GPU length must be verified against specific AIB model dimensions to ensure clearance under 420mm.
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Useful next steps
Upgrade to Dual-Channel RAM
Replace the single 32GB module with a matched 2x16GB or 2x32GB kit. A single-stick configuration limits memory bandwidth, significantly hindering the i9-13900K's potential in memory-intensive tasks.
Enable XMP in BIOS
After installing dual-channel memory, enable the XMP profile in the ASUS BIOS to ensure the modules operate at their advertised speed rather than the default JEDEC frequency.