Why Qwen3 Coder 480B A35B pressures system RAM
Qwen3 Coder 480B A35B is Mixture-of-Experts: inference activates 35B active/token, but VRAM/RAM must usually hold the full ~480B expert set for fast routing. At Q4 the weight slab is ~270GB before KV (~0.09GB at 8K) and ~8GB OS/runtime overhead — totaling ~278.1GB raw, rounded to a 384GB kit. Stretching toward the full 262K-token window multiplies KV far faster than weights; that is the usual “I bought enough RAM for the model but still OOM” failure on Alibaba Qwen MoE pages.
What RAM kit to buy
Shop 384GB-class capacity for Qwen3 Coder 480B A35B: workstation DDR5 RDIMM/LRDIMM or multi-kit desktop builds, not a single gamer 2×16GB stick. Use our 128GB+ price hubs and RAM Finder; confirm ECC needs for your board. GPU path: Apple Mac Studio (192GB Unified Memory) or Institutional Node (8x H100 / A100) (282GB VRAM class) if you want weights on-device instead of system-RAM offload.
Workload notes
Qwen-family models like Qwen3 Coder 480B A35B often ship strong coding/agent variants; leave RAM for tool runners and browser IDEs beside the weights. At 480B total parameters this is frontier-scale — expect multi-GPU or heavy CPU offload even in Q4; the 384GB kit is a host-memory floor, not a promise of interactive tokens/s. Release window noted as 2025/2026; always re-check the model card before buying hardware for a specific checkpoint.