Previous generation Desktop workstation · 2023
Mac Studio M2 Ultra (64 GB)
Classic for 70B in 4-bit. Previous generation — cheaper than current alternatives.
- RAM
- 64 GB
- Bandwidth
- 800 GB/s
- Comfortable model range
- 35B
Local AI fit
35B is the realistic daily range
Comfortable up to 35B. 70B Q4 is possible at moderate context but requires disciplined headroom.
- Comfortable
- 35B
- Tight
- 70B
- Capacity edge
- 70B
70B is a capacity edge, not a benchmark or a guarantee. Even the “comfortable” 35B tier is an editorial estimate, not a tested throughput result. Actual fit depends on weight quantization, model architecture, KV-cache and context size, available RAM, backend and concurrent apps.
64GB explained Why unified memory is more than model weights Understand quantization, KV cache, macOS headroom, and the difference between “fits” and “runs well.” Open RAM guidePurchase status
Previous generation
Most compelling when priced clearly below a current model with similar memory.
- Generation
- M2-Ultra
- Released
- 2023
- Catalog data checked
At a glance
Technical Specs
- Chip
- M2-Ultra
- RAM
- 64 GB
- CPU cores
- 24
- GPU cores
- 60
- Memory bandwidth
- 800 GB/s
- Form factor
- Desktop workstation
- Release year
- 2023
What works well
Pros
- 70B Q4 at moderate context
- 24 CPU cores
What to consider
Cons
- Previous generation
- Heavy
Before spending money
Four checks that matter more than a model-size badge
- Match the exact RAM, SSD, chip and port configuration to the linked offer. A similar product name does not establish identical hardware.
- Estimate memory for your actual quantized model, chosen context and runtime; include macOS and app headroom. Do not treat “70B supported” as a throughput guarantee.
- Check the complete checkout total, delivery location, seller and return conditions. Listings here are not real-time price quotes.
- For used devices, inspect battery health, hardware locks, repairs and warranty before paying.
Data verified
Catalog specifications last reviewed on June 3, 2026; merchant links can have different dates. Live checkout prices, inventory and AI inference speeds have not been independently verified here.
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