PC Build to Run Granite 4.1 30B Locally (Q8_0)
作者： Jakub Rusinowski · 最后更新： 2026年4月29日
A complete parts list — GPU, motherboard, RAM and PSU — worked backward from Granite 4.1 30B's VRAM requirement at Q8_0. Prices are 2026 street estimates and vary.
Requirements
| VRAM required | ~33 GB at Q8_0 |
| System RAM | 32 GB |
| Complete build (est.) | $3,303 |
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.
作为亚马逊联盟成员，我们从符合条件的购买中获得收入。云 GPU 链接为推荐链接——我们可能获得佣金，您无需额外付费。
GPU: 2× AMD Radeon RX 7900 XT
2× AMD Radeon RX 7900 XT (40 GB pooled) covers Granite 4.1 30B at Q8_0 (~33 GB needed), with headroom.
Motherboard: ASUS ProArt X670E-Creator WIFI
X670E (AM5) — pairs with the AMD Ryzen 9 7900X; DDR5, dual PCIe 5.0 x16 (x8/x8) for multi-GPU, 4 DIMM slots to 192 GB.
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.
PSU: Corsair HX1500i (ATX 3.1)
1500 W 80+ Platinum covers 2× AMD Radeon RX 7900 XT (630 W) + CPU 170 W with 30% headroom (~1040 W required).
Swap Alternatives
- GPU: NVIDIA RTX 6000 Ada Generation — Single-GPU alternative (no tensor split, simpler): NVIDIA RTX 6000 Ada Generation 48 GB at $6,799.
- RAM: Corsair Vengeance 64GB (2x32GB) DDR5-6000 C30 (AMD EXPO) — More headroom: 64 GB DDR5-6000.
- Granite 4.1 30B at Q8_0 needs more VRAM than any single consumer GPU, so this uses 2× AMD Radeon RX 7900 XT (40 GB pooled via tensor split) — cheaper than the single NVIDIA RTX 6000 Ada Generation (48 GB, $6,799) that would also fit.
FAQ
What GPU do I need to run Granite 4.1 30B at Q8_0?
2× AMD Radeon RX 7900 XT (40 GB pooled) covers Granite 4.1 30B at Q8_0 (~33 GB needed), with headroom.
How much VRAM does Granite 4.1 30B need at Q8_0?
About 33 GB of VRAM plus 32 GB of system RAM.
What power supply does a AMD Radeon RX 7900 XT build need?
1500 W 80+ Platinum covers 2× AMD Radeon RX 7900 XT (630 W) + CPU 170 W with 30% headroom (~1040 W required).
How much does a Granite 4.1 30B PC cost?
About $3,303 for a complete build (GPU, motherboard, RAM, PSU, CPU, case, SSD), at 2026 street-price estimates.
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← Budget-first build recommender | IBM Granite 4.1 model page | AMD Radeon RX 7900 XT review