PC Build to Run Granite 4.1 30B Locally (Q5_K_M)
Written by Jakub Rusinowski · Last updated April 29, 2026
A complete parts list — GPU, motherboard, RAM and PSU — worked backward from Granite 4.1 30B's VRAM requirement at Q5_K_M. Prices are 2026 street estimates and vary.
Requirements
| VRAM required | ~22 GB at Q5_K_M |
| System RAM | 32 GB |
| Complete build (est.) | $1,849 |
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GPU: AMD Radeon RX 7900 XTX
AMD Radeon RX 7900 XTX's 24 GB covers Granite 4.1 30B at Q5_K_M (~22 GB needed), a tight fit — little headroom.
AMD Radeon RX 7900 XTX 24GB
Launch MSRP: $999
2026 prices are volatile — check the current listing.
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.
RAM: Corsair Vengeance 32GB (2x16GB) DDR5-6000 C30 (AMD EXPO)
32 GB DDR5-6000 (2x16GB) meets Granite 4.1 30B's 32 GB recommended system RAM.
Corsair Vengeance 32GB (2x16GB) DDR5-6000 C30
2026 prices are volatile — check the current listing.
PSU: Corsair RM650e (ATX 3.1)
650 W 80+ Gold covers AMD Radeon RX 7900 XTX (355 W) + CPU 65 W with 30% headroom (~546 W required).
Corsair RM650e (ATX 3.1)
2026 prices are volatile — check the current listing.
Swap Alternatives
- GPU: NVIDIA GeForce RTX 5090 — NVIDIA GeForce RTX 5090's 32 GB covers Granite 4.1 30B at Q5_K_M (~22 GB needed), with headroom.
- GPU: NVIDIA RTX 6000 Ada Generation — NVIDIA RTX 6000 Ada Generation's 48 GB covers Granite 4.1 30B at Q5_K_M (~22 GB needed), with headroom.
- RAM: Corsair Vengeance 64GB (2x32GB) DDR5-6000 C30 (AMD EXPO) — More headroom: 64 GB DDR5-6000.
- PSU: Corsair RM850e (ATX 3.1) — More headroom / future dual-GPU: 850 W 80+ Gold.
- The AMD Radeon RX 7900 XTX is a tight fit at Q5_K_M — consider an upgrade alternative for KV-cache/context headroom.
FAQ
What GPU do I need to run Granite 4.1 30B at Q5_K_M?
AMD Radeon RX 7900 XTX's 24 GB covers Granite 4.1 30B at Q5_K_M (~22 GB needed), a tight fit — little headroom.
How much VRAM does Granite 4.1 30B need at Q5_K_M?
About 22 GB of VRAM plus 32 GB of system RAM.
What power supply does a AMD Radeon RX 7900 XTX build need?
650 W 80+ Gold covers AMD Radeon RX 7900 XTX (355 W) + CPU 65 W with 30% headroom (~546 W required).
How much does a Granite 4.1 30B PC cost?
About $1,849 for a complete build (GPU, motherboard, RAM, PSU, CPU, case, SSD), at 2026 street-price estimates.
Granite 4.1 30B at Other Quant Levels
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← Budget-first build recommender | IBM Granite 4.1 model page | AMD Radeon RX 7900 XTX review