Best RAM for local AI
When a model doesn't fit on your graphics card, the rest lives in system RAM. More RAM means bigger models; faster RAM means quicker answers. 32GB is the floor, 64GB runs gpt-oss 120B with a 16GB card, and Qwen3 235B needs 128GB to 192GB. We're adding 96GB, 128GB and 192GB kits as UK stock settles.
Check what your PC can run → Pick your card and RAM, see which Qwen, DeepSeek and Llama models run and how fast.
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Best for most local AI
1. Crucial Pro DDR5 64GB 6000 CL40
Desktop · DDR5 · 6000MHz CL40 · 64GB (2x32GB)
With a 16GB card, 64GB runs gpt-oss 120B and Qwen3 30B models with RAM helping. 6000MHz keeps offloaded models as quick as DDR5 gets.
Used on eBay right now
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Best for older PCs
2. Corsair Vengeance LPX DDR4 64GB 3200
Desktop · DDR4 · 3200MHz · 64GB (2x32GB)
64GB for AM4 and older Intel boards. DDR4 runs offloaded models at roughly half DDR5 speed, but capacity decides what fits. Used kits on eBay are far cheaper.
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3. Corsair Dominator Platinum RGB DDR5 64GB
Desktop · DDR5 · 64GB (2x32GB)
Same capacity as the Crucial, about £35 more for heatsinks and lighting.
Used on eBay right now
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The minimum
4. Crucial Pro DDR5 32GB 6000 CL36
Desktop · DDR5 · 6000MHz CL36 · 32GB (2x16GB)
Enough for models that live on your graphics card, plus Qwen3 30B-A3B with a 16GB card. Not enough for anything bigger.
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5. Corsair Vengeance LPX DDR4 32GB 3200
Desktop · DDR4 · 3200MHz · 32GB (2x16GB)
The DDR4 minimum. If you're upgrading an AM4 PC for AI, go straight to 64GB if your budget stretches.
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For laptops and mini PCs
6. Kingston Fury Impact DDR5 SODIMM 32GB 5600
Laptop · DDR5 · 5600MT/s · 32GB (2x16GB)
Laptop and mini-PC owners: 32GB is the realistic ceiling on most two-slot machines, which is enough for 8B to 14B models.
Nothing matches those filters. Try fewer filters, or search for a brand like "MSI" or "Crucial".
How we rank
Ranked on capacity per pound first (it decides what fits), then speed: dual-channel DDR5-6000 moves roughly twice the data of DDR4-3200, so offloaded models run about twice as fast. Prices checked daily.
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