Compute platform
AMD Ryzen 9 9950X
ASRock X870E Taichi Lite
128 GB system RAM
Performancenewdesktop
RTX 5090 32 GB coding flagship
The fastest practical consumer single-GPU CUDA option, with 32 GB VRAM for strong coding models and very high prompt/decode headroom.
Complete system estimate
Price band$5,400–$6,900Checked 2026-08-18
Accelerator memory32 GB1× NVIDIA GeForce RTX 5090 32 GB
Typical / peak630 / 850 W
Circuit15 AUS electrical assumption
Compatibility-checked bill of materials
| Category | Part | Qty | Estimate | Source record |
|---|---|---|---|---|
| accelerator | RTX 5090 32 GB board-partner card | 1 | $3,900 | nvidia-rtx-5090 bh-5090-market |
| cpu | AMD Ryzen 9 9950X | 1 | $600 | amd-cpu-specs |
| motherboard | ASRock X870E Taichi Lite | 1 | $300 | asrock-motherboards |
| memory | 128 GB DDR5 | 1 | $320 | asrock-motherboards |
| storage | 4 TB PCIe 4.0 NVMe SSD | 1 | $240 | asrock-motherboards |
| psu | Corsair HX1200i ATX 3.1 1200 W | 1 | $250 | corsair-psu |
| case | Fractal Meshify 2 XL | 1 | $210 | fractal-cases |
| cooling | Arctic Liquid Freezer III 420 | 1 | $145 | amd-cpu-specs |
| networking | Integrated 5 GbE and Wi-Fi 7 | 1 | $0 | asrock-motherboards |
Template checks: 1200 W PSU; 3/5 declared slots; 336 mm GPU against 549 mm clearance. Board-partner dimensions must still be confirmed before purchase.
What you are buying
Storage & network
4 TB storage
5 GbE + Wi-Fi 7
Thermals
Fractal Meshify 2 XL
Arctic Liquid Freezer III 420
Expected noise: loud
Tradeoffs and upgrade path
- Current street pricing is far above launch MSRP.
- Power transients, 12V-2x6 cable seating, heat, and acoustics require careful assembly.
Upgrade path: Retain the AM5 host for a future single GPU; this consumer-board template is not presented as dual-GPU capable.
Provenance
GeForce RTX 5090 specifications
Reference 32 GB, 575 W, and 1000 W system-power guidance.
AMD Ryzen processor specifications
CPU platform and product-family source; exact street prices remain estimates.
ASRock motherboard product catalog
Compatibility reference for motherboard form factor and expansion slots.
Corsair power supplies
PSU capacity and connector-family reference.
Fractal Design cases
Chassis clearance and cooling-layout reference.
llama.cpp CUDA generation optimization benchmark
Measured Qwen3 30B-A3B Q4 generation on RTX 4090 and RTX 5090; comparable, not exact, for the Coder checkpoint.
B&H RTX 5090 category
Board-partner availability reference; catalog price is a wide observed range, not live pricing.