PC Build to Run InternLM 3 20B Instruct Locally (Q4_K_M)
Autor: Jakub Rusinowski · Ostatnia aktualizacja: 15 stycznia 2025
A complete parts list — GPU, motherboard, RAM and PSU — worked backward from InternLM 3 20B Instruct's VRAM requirement at Q4_K_M. Prices are 2026 street estimates and vary.
Requirements
| VRAM required | ~13 GB at Q4_K_M |
| System RAM | 32 GB |
| Estimated speed | ~16 tok/s |
| Complete build (est.) | $979 |
Weights plus framework overhead only — this model publishes no architecture we can read, so no KV cache is included. A real session needs more; the figure is a floor, not a target.
lub porównaj w Vast.ai od $0.35/godz. (typical low · varies)
Jako partner Amazon zarabiamy na kwalifikujących się zakupach. Linki do chmurowych GPU są linkami polecającymi — możemy otrzymać prowizję bez dodatkowych kosztów dla Ciebie.
GPU: AMD Radeon RX 9060 XT 16GB
AMD Radeon RX 9060 XT 16GB's 16 GB covers InternLM 3 20B Instruct at Q4_K_M (~13 GB needed), with headroom.
Motherboard: MSI MAG B550 Tomahawk
B550 (AM4) — pairs with the AMD Ryzen 5 5600; DDR4, dual PCIe 4.0 x16 (x8/x8) for multi-GPU, 4 DIMM slots to 128 GB.
RAM: Corsair Vengeance LPX 32GB (2x16GB) DDR4-3600 C18 PREVIEW
32 GB DDR4-3600 (2x16GB) meets InternLM 3 20B Instruct's 32 GB recommended system RAM.
PSU: Corsair RM650e (ATX 3.1)
650 W 80+ Gold covers AMD Radeon RX 9060 XT 16GB (160 W) + CPU 65 W with 30% headroom (~293 W required).
Swap Alternatives
- GPU: AMD Radeon RX 7900 XT — AMD Radeon RX 7900 XT's 20 GB covers InternLM 3 20B Instruct at Q4_K_M (~13 GB needed), with headroom.
- GPU: AMD Radeon RX 7900 XTX — AMD Radeon RX 7900 XTX's 24 GB covers InternLM 3 20B Instruct at Q4_K_M (~13 GB needed), with headroom.
- PSU: Corsair RM850e (ATX 3.1) — More headroom / future dual-GPU: 850 W 80+ Gold.
- Some component specs are marked "preview" (pending a second independent source) — see the badges.
FAQ
What GPU do I need to run InternLM 3 20B Instruct at Q4_K_M?
AMD Radeon RX 9060 XT 16GB's 16 GB covers InternLM 3 20B Instruct at Q4_K_M (~13 GB needed), with headroom.
How much VRAM does InternLM 3 20B Instruct need at Q4_K_M?
About 13 GB of VRAM plus 32 GB of system RAM.
What power supply does a AMD Radeon RX 9060 XT 16GB build need?
650 W 80+ Gold covers AMD Radeon RX 9060 XT 16GB (160 W) + CPU 65 W with 30% headroom (~293 W required).
How much does a InternLM 3 20B Instruct PC cost?
About $979 for a complete build (GPU, motherboard, RAM, PSU, CPU, case, SSD), at 2026 street-price estimates.
InternLM 3 20B Instruct at Other Quant Levels
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Model & GPU
- InternLM 3 model page
- AMD Radeon RX 9060 XT 16GB review
- Can I run InternLM 3 on AMD Radeon RX 9060 XT 16GB?
More Ways to Build
← Budget-first build recommender | InternLM 3 model page | AMD Radeon RX 9060 XT 16GB review