PC Build to Run Gemma 3 12B Instruct Locally (Q8_0)

Autor: Jakub Rusinowski · Ostatnia aktualizacja: 10 lipca 2026

A complete parts list — GPU, motherboard, RAM and PSU — worked backward from Gemma 3 12B Instruct's VRAM requirement at Q8_0. Prices are 2026 street estimates and vary.

Requirements

VRAM required~17 GB at Q8_0
System RAM32 GB
Estimated speed~99 tok/s
Complete build (est.)$1,749
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GPU: AMD Radeon RX 7900 XT

AMD Radeon RX 7900 XT's 20 GB covers Gemma 3 12B Instruct at Q8_0 (~17 GB needed), with headroom.

Sprawdź cenę na Amazon — AMD Radeon RX 7900 XT 20GB

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.

Sprawdź cenę na Amazon — ASUS TUF Gaming B650-PLUS WIFI

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

32 GB DDR5-6000 (2x16GB) meets Gemma 3 12B Instruct's 32 GB recommended system RAM.

Sprawdź cenę na Amazon — Corsair Vengeance 32GB (2x16GB) DDR5-6000 C30

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).

Sprawdź cenę na Amazon — Corsair RM650e (ATX 3.1)

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FAQ

What GPU do I need to run Gemma 3 12B Instruct at Q8_0?

AMD Radeon RX 7900 XT's 20 GB covers Gemma 3 12B Instruct at Q8_0 (~17 GB needed), with headroom.

How much VRAM does Gemma 3 12B Instruct need at Q8_0?

About 17 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 Gemma 3 12B Instruct 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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