RTX 5090 vs 4090 vs 3090 for LLM: Which Flagship GPU Should You Buy for Local Models?
RTX 5090 vs 4090 vs 3090 for LLM: VRAM, bandwidth, power and price compared with derived speed ceilings and a clear buying rule for local models.
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GPU Price Timing for Local LLM: Should You Buy Now or Wait?
GPU price timing for local LLM: judge buy-now or wait using price per GB of VRAM, quote spreads and a four-question checklist, without guessing the market.
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3090 4090 5090 跑大模型怎么选：显存、带宽、功耗和价格一次讲清
3090 4090 5090 跑大模型怎么选：对比显存、带宽、功耗和价格，给出推算速度上限和一条清晰的购买规则。
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本地大模型显卡什么时候买：现在入手还是再等等
本地大模型显卡什么时候买？用每 GB 显存价格、报价差距和四个问题的清单判断现在买还是再等，不靠猜行情。
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Used GPU for Local LLMs: How to Pick and Test an RTX 3090 or 4060 Ti 16GB
Used GPU for local LLMs: price per GB of VRAM for the RTX 3090 and 4060 Ti 16GB, an inspection checklist, burn-in tests, and and the listings that burn buyers.
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二手显卡跑大模型：RTX 3090、4060 Ti 16GB 怎么挑、怎么验
二手显卡跑大模型怎么买？以 RTX 3090、4060 Ti 16GB 为例，讲每 GB 显存的价格、验货清单、烧机测试，以及哪些挂单最容易踩坑。
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24GB VRAM PC Build: A Used RTX 3090 Machine at About 14299 Yuan, and How It Compares With an RTX 4090
24GB VRAM PC build: a used RTX 3090 machine at about 14299 yuan against about 33214 for a 4090, with parts, models that fit, power and cooling, and risks.
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Dual GPU LLM Build: Two Used RTX 3090s for 48GB, Parts, Power, Cooling and Limits
Dual GPU LLM build guide: two used RTX 3090s for 48GB, what fits, PCIe, PSU, cooling, llama.cpp and Ollama splitting, derived cost, and when one card is better.
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24GB 显存装机方案：二手 RTX 3090 整机约 14299 元，与 RTX 4090 怎么选
24GB 显存装机方案：二手 RTX 3090 整机参考价约 14299 元，对比 4090 整机约 33214 元，附完整配置、能跑的模型、电源散热与风险提示。
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双3090 装机：两张二手 3090 凑 48GB 显存，配件、电源、散热与局限（2026）
双3090 装机指南：两张二手 3090 组 48GB 显存，能跑什么、PCIe、电源与散热、llama.cpp 和 Ollama 的分卡方式、推算造价，以及何时单卡更合适。
