PC Build to Run Qwen 3 14B Locally (Q8_0)

Written by Jakub Rusinowski · Last updated April 28, 2025

A complete parts list — GPU, motherboard, RAM and PSU — worked backward from Qwen 3 14B's VRAM requirement at Q8_0. Prices are 2026 street estimates and vary.

Requirements

VRAM required~18 GB at Q8_0
System RAM32 GB
Estimated speed~46 tok/s
Complete build (est.)$1,749
Buy This HardwareAMD Radeon RX 7900 XT 20GB — 20 GB VRAM · 315 W board powerDeploy in the Cloud NowRTX 4090 on RunPod — from $0.34/hr · rate checked 2026-07

or compare on Vast.ai from $0.35/hr (typical low · varies)

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GPU: AMD Radeon RX 7900 XT

AMD Radeon RX 7900 XT's 20 GB covers Qwen 3 14B at Q8_0 (~18 GB needed), with headroom.

AMD Radeon RX 7900 XT 20GB
20 GB VRAM · 315 W board power
2026 prices are volatile — check the current listing.
Check price on Amazon

Motherboard: ASUS TUF Gaming B650-PLUS WIFI

B650 (AM5) — pairs with the AMD Ryzen 7 7700; DDR5, dual PCIe 4.0 x16 (x8/x8) for multi-GPU, 4 DIMM slots to 256 GB.

ASUS TUF Gaming B650-PLUS WIFI
2026 prices are volatile — check the current listing.
Check price on Amazon

RAM: Corsair Vengeance 32GB (2x16GB) DDR5-6000 C30 (AMD EXPO)

32 GB DDR5-6000 (2x16GB) meets Qwen 3 14B's 32 GB recommended system RAM.

Corsair Vengeance 32GB (2x16GB) DDR5-6000 C30
2026 prices are volatile — check the current listing.
Check price on Amazon

PSU: Corsair RM650e (ATX 3.1)

650 W 80+ Gold covers AMD Radeon RX 7900 XT (315 W) + CPU 65 W with 30% headroom (~494 W required).

Corsair RM650e (ATX 3.1)
2026 prices are volatile — check the current listing.
Check price on Amazon

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FAQ

What GPU do I need to run Qwen 3 14B at Q8_0?

AMD Radeon RX 7900 XT's 20 GB covers Qwen 3 14B at Q8_0 (~18 GB needed), with headroom.

How much VRAM does Qwen 3 14B need at Q8_0?

About 18 GB of VRAM plus 32 GB of system RAM.

What power supply does a AMD Radeon RX 7900 XT build need?

650 W 80+ Gold covers AMD Radeon RX 7900 XT (315 W) + CPU 65 W with 30% headroom (~494 W required).

How much does a Qwen 3 14B PC cost?

About $1,749 for a complete build (GPU, motherboard, RAM, PSU, CPU, case, SSD), at 2026 street-price estimates.

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Model & GPU

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← Budget-first build recommender | Qwen 3 model page | AMD Radeon RX 7900 XT review