I400C40 is the 40 ft, no-UPS twin: same eight A32 tanks, same 400 kW, same T50 — five feet shorter because the power bay is gone. Buy it when the yard already has UPS, or lithium cannot enter the compute enclosure. Expansion blocks: 90 days ex-works.I400C40 是 40 英尺、无 UPS 的双生：同样八个 A32、同样 400 kW、同样 T50——短五英尺，因为配电舱拿掉了。场地上已经有 UPS，或不许锂电池进算力箱时，买这一台。扩容模块 90 天出厂（EXW）。
I400C40 is the no-UPS twin of I400C45. Same 400 kW, same eight A32 tanks, same T50 density — in a 40 ft shell because the UPS and battery volume is gone. Buy it when the site already has distribution, or when lithium is not allowed inside the compute enclosure.I400C40 是 I400C45 的无 UPS 双生。同样 400 kW、同样八个 A32、同样 T50 密度——装进 40 英尺，是因为 UPS 和电池那个体积拿掉了。场站已经有配电，或不许锂电池进算力箱时，买这一台。
I400C40ST50 (I400C40)Roadmap A separate MDCX power module (UPS / battery / PDC) is in development for sites where the boundary must sit outside the compute enclosure.面向必须把边界划到算力箱体之外的场地，MDCX 独立电源模块（UPS / 电池 / PDC）正在开发中。
Pick I400C40 when I400C45 would force you to pay twice for power — once in the box, once in the yard. The tanks do not change. The enclosure is five feet shorter. A separate MDCX power module for sites that need the boundary outside the box is Roadmap.当 I400C45 会让你为电付两次钱——一次在箱里，一次在场地上——就选 I400C40。液舱不变。箱子短五英尺。面向必须把边界划到箱外的独立电源模块是路线图。
Immersion is the lowest-OpEx path to PCIe density. Why Immersion Cooling →浸没是 PCIe 密度的最低 OpEx 路径。为何选择浸没液冷 →
The 40 ft layout is the eight-tank hall without the power bay. Orbit the aisle and oil loop; UPS lives in the yard, not in this model.40 英尺布置是去掉配电舱后的八舱大厅。环绕通道和油回路；UPS 在场地上，不在这个模型里。
Heavy USD is explicit download only. Naming and packaging rules: USD output spec.大体积 USD 仅提供显式下载。命名与封装规则见 USD 输出规格。
I400C40 is the 40 ft compute enclosure only. Customer-supplied UPS / battery / PDC sit outside. Recommended IT 360 kW, max 400 kW. The full side-by-side with I400C45 — container length, backup minutes, UL — lives on the I400C45 page. A separate MDCX power module is Roadmap.I400C40 只是 40 英尺算力箱。客户自备的 UPS / 电池 / PDC 在箱外。推荐 IT 360 kW，最大 400 kW。与 I400C45 的柜长、后备分钟、UL 对照表在 I400C45 页。独立电源模块是路线图。
TCO and Designer for I400C40 take ?code=I400C40ST50. The model prices the eight-tank hall; UPS CAPEX is yours. If the pad has no distribution yet, start on I400C45 instead.I400C40 的 TCO 与设计器走 ?code=I400C40ST50。模型只给八舱大厅报价；UPS 资本开支在你这边。场站还没有配电时，先看 I400C45。