Full-server DLC conversion kit, 2U, 2 CPU + 8 GPU
整机液冷改造套件 2U 双路+8卡 · Cooling
What Qing asks
One dense message. Five is the whole budget per supplier reply, so the questions that decide comparability go first.
- 1.
贵司是否书面保证：本单所有处理器与加速卡均为量产正式版，非ES/QS工程样片？如发现，整批退货并由卖方承担往返运费与检验费。请确认接受写入合同。
Do you warrant in writing that all processors and accelerators are production retail/tray silicon, not ES/QS? If any are found, the full lot is returnable at your cost including freight and inspection fees. Confirm this goes into the contract.
Turns an ES delivery from an argument into a contractual breach with a pre-agreed remedy.
- 2.
这批货目前是现货在库还是需要收到定金后再向上游采购？如为现货，请提供仓库实拍视频（含外箱堆码与标签）与库存数量截图，并注明可锁货天数。
Is this physical stock in your warehouse now, or will you buy it upstream after receiving the deposit? If in stock, send a warehouse video showing cartons and labels, the inventory quantity, and how many days you can hold it for us.
In a memory shortage the decisive question is not price but whether the seller actually holds the goods. A forward seller in a rising market simply fails to deliver and returns the deposit months later.
这批货是全新原封、官翻、拆机件还是工程样片(ES/QS)？请在形式发票上写明状态。如果是拆机件，来源和使用时长是多少？
报价是EXW、FOB还是CIF？指定口岸是哪里？报价里不含哪些费用(出口报关、内陆运输、保险、目的港费用)？
外箱尺寸多少？每箱装几台、毛重多少公斤？每托盘几箱？整单总体积多少立方米？是木托还是纸托、是否需要熏蒸证明？
请给出阶梯报价：1台、10台、50台、100台各是什么价格？每个型号的起订量是多少？价格有效期多久？
出口报关准备用哪个HS编码？报价是含税价还是不含税价？该编码的出口退税率是多少、退税是否已经体现在报价里？
整机原产地写哪里？能否出具原产地证(一般CO还是Form E/RCEP优惠证)？货物是从中国直接出口，还是经香港、新加坡或越南转运？
质保多少个月？DOA(到货即损)申报期限是几天？返修是寄回中国还是有海外备件？是否提供先行换货？返修运费谁承担？
这个托架/导轨/面板是原厂件还是兼容件？上面有没有原厂LOGO或型号标识？能否书面保证不侵犯第三方商标和专利，并承担相关责任？
整机和关键部件(CPU、加速卡、网卡)的原产地分别是哪里？产品里有没有使用美国原产的芯片、软件或技术？大概占多少比例？能不能配合签署最终用户和最终用途声明、承诺不转运？这个型号以前出口过哪些国家？
合同和发票的签约主体全称是什么？统一社会信用代码是多少？工厂是自有还是代工？母公司或控股股东是谁、持股比例多少？有没有国资或上市公司背景？
请提供公司全称、统一社会信用代码和营业执照复印件。贵司是生产工厂、原厂授权代理还是贸易商？如为工厂，工厂地址在哪里、可否安排验厂或视频验厂？开票主体与收款主体是否为同一家公司？
最小起订量是多少？请给出阶梯报价（如100/500/1000/5000片）。报价有效期多少天？NAND和HDD价格波动时如何调价？是否接受锁价？
+ 37 more universal terms
How buyers get burned here
Category-specific, from research rather than generic advice
- Capacity quoted without an approach temperature. This is the single biggest trap in CDU sourcing. A CDU rated '800 kW' at a 5 K approach may deliver only 500-550 kW at the 3 K approach your design actually needs. Two quotes are not comparable until both state the approach.
- Air-cooling capacity quoted at a 35C return-air temperature. Chinese precision-AC datasheets commonly use a warmer return condition than Western practice, which inflates the sensible kW by 20-30%. Always restate the capacity at your own hall condition.
- Sensible versus total cooling capacity. A total-cooling number includes latent capacity you will never use in a data centre. Insist on sensible-only.
- Pump curves given on water at 20C when the fluid is 25% glycol at 45C. The viscosity penalty is real and vendors rarely volunteer the corrected curve. Your flow will be short and nobody will know why until commissioning.
- 'Supports Modbus' with no register map supplied. This is near-universal among Chinese CDU vendors and it strands the DCIM integration for months. Make the documented register map, BACnet object list and SNMP MIB explicit PO deliverables with payment tied to them.
- Filter micron ratings quoted as nominal, not absolute. A 50-micron nominal filter passes particles that block a 0.3 mm microchannel cold plate. Specify absolute and demand the beta ratio.
- Coolant sold as concentrate and diluted on site with local tap water. This destroys the inhibitor package, introduces chlorides and hardness, and is the most common root cause of first-year corrosion in Chinese liquid-cooling installations. Buy premixed with DI water, in sealed IBCs.
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