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Product · Immersion Cooling
400 Immersion Cooling Container (I400C40) I400C40ST50 40 ft 400 kW Immersion Cooling · 8× A32 tanks · up to 50 kW/tank · UPS outside the box

Same 400 kW core.
Your own power architecture.

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.

Runs CIOS · →
400 kW
IT Capacity
512 GPUs
PCIe · Max per Container
ΔT 8 K
Immersion Oil Loop
PUE ≈ 1.05
≤ 24 °C dry-bulb / free-cooling
01
What I400C40 is

Eight tanks in 40 ft. You bring the power architecture.

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.

SKU ID
I400C40ST50 (I400C40)
Form Factor
40 ft container
IT Capacity
400 kW · 8× A32 tanks + 1× 10 kW air rack
GPU Platform
4090 · 5090 · RTX PRO 6000 Blackwell SE · H100 · H200 (PCIe, 4U 8-GPU)
Cooling
Single-phase immersion · dual 2N CDU per tank
UPS
External — UPS / battery / PDC outside the box
Density
Up to 50 kW/tank (T50)
PUE
≈ 1.05 · peak dry-bulb ≤ 24 °C — not hot-zone
Lead Time
90 d EXW from down payment · expansion 90 d EXW

Roadmap A separate MDCX power module (UPS / battery / PDC) is in development for sites where the boundary must sit outside the compute enclosure.

I400C40 container floor plan: 8 immersion tanks, service aisle, power and cooling distribution
I400C40 floor plan — 8 immersion tanks, service aisle, power and cooling distribution.
02
The one thing

Same eight tanks as I400C45. The only difference is the power boundary and five feet.

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.

Immersion is the lowest-OpEx path to PCIe density. Why Immersion Cooling →

03
Walk through it

Explore the I400C40 40 ft box in 3D

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.

Schematic cutaway of the shared eight-tank hall (I400C45 model; I400C40 is 5 ft shorter, no power bay)

Schematic: I400C45 cutaway. I400C40 uses the same tank layout; the enclosure is five feet shorter and has no power bay.

The OpenUSD reference model is published in the annex of the I400C40 Reference Design. Heavy USD is explicit download only. Specs: USD output.

04
The power boundary

You own the UPS. The tanks stay ours.

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.

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Single-line power, cooling loops, ratings, and downloads for engineers.

Questions

What is the difference between I400C40 and I400C45?

They share the same 400 kW, eight-tank core. I400C45 puts UPS and battery in a 45 ft power bay. I400C40 (I400C40ST50) drops that volume: 40 ft, UPS outside.

Why is I400C40 five feet shorter?

The five feet is the power bay. Remove UPS and battery from the enclosure and the hall is 40 ft.

When should I choose the no-UPS version?

Choose I400C40 when the site already has distribution, or when lithium is not allowed inside the compute enclosure.

How long is delivery for I400C40?

First delivery is 90 days ex-works from receipt of down payment. Expansion blocks: 90 days ex-works.

Specifications updated August 2026 · design targets, site conditions apply.