This MDCX Reference Design is the published plant result for 1240 Liquid Cooling Container with UPS (L1240C45), SKU L1240C45SUR150, solved at UAE - Dubai / Abu Dhabi under summer peak, training workload, 80% utilization, GPU HGX B300 4U × 8 GPUs (per rack slot).

MDCX Reference Design

1240 Liquid Cooling Container with UPS (L1240C45)

L1240C45SUR150

Liquid Cooling solution

Generated 2026-08-25

Parameter fingerprint sha256:3c855d46dda30bbca84ebbd478474a4f51da246b49cb2dacded661e2159874c8

SKU: L1240C45SUR150
GPU: hgx-b300-4u-8 · SXM
City: ae-dubai
Quantity: 1
Workload: Training
Season: Summer peak
Utilization: 80%

Recompute from this input list and compare fingerprints to verify the solve.

System boundary

The MDCX-supplied envelope is the container. Primary (utility) and secondary (facility) electrical sides meet at the transformer. Site responsibility begins at the published electrical and water interfaces.

Primary: utility. Secondary: facility. Boundary: transformer.

UPS is inside the container envelope.

Electrical interface — connection capacity

1167.6 kW

ae-dubai Summer peak Training 80%

computed engine.electrical.declaration.plus10_v1

Water interface — makeup

0 L/min

ae-dubai Summer peak Training 80%

computed engine.site.makeup.dry_v1

Interface definition only. Implementation details are not published.

Electrical

Single-line topology (interface definition). Protection settings are not published.

Grid
Transformer
Main switch
PDC
Rack

Transformer capacity

1250 kW

ae-dubai Summer peak Training 80%

computed engine.electrical.v1

Connection capacity

1167.6 kW

ae-dubai Summer peak Training 80%

computed engine.electrical.declaration.plus10_v1

Interface definition only. Implementation details are not published.

Thermal

Heat split, water window, and free-cooling share. CDU and heat-exchanger make/model are not published.

IT heat — liquid

625.5 kW

ae-dubai Summer peak Training 80%

computed engine.thermal.rdhx9door_v1

IT heat — air

196.4 kW

ae-dubai Summer peak Training 80%

computed engine.thermal.rdhx9door_v1

IT heat — total

821.9 kW

ae-dubai Summer peak Training 80%

computed engine.thermal.rdhx9door_v1

CDU rated cooling

1500 kW

ae-dubai Summer peak Training 80%

computed engine.thermal.cdu.catalog_v1

CDU secondary flow

175 m³/h

ae-dubai Summer peak Training 80%

computed engine.thermal.cdu.catalog_v1

CDU approach

4 K

ae-dubai Summer peak Training 80%

computed engine.thermal.cdu.catalog_v1

Supply water

26 °C

ae-dubai Summer peak Training 80%

computed engine.thermal.waterWindow_v1

Return water

36 °C

ae-dubai Summer peak Training 80%

computed engine.thermal.waterWindow_v1

Water ΔT

10 K

ae-dubai Summer peak Training 80%

computed engine.thermal.waterWindow_v1

Heat-exchange approach

4 K

ae-dubai Summer peak Training 80%

computed engine.thermal.heatExchange.catalog_v1

Dry-cooler / chiller switch

31 °C

ae-dubai Summer peak Training 80%

computed engine.thermal.dryCoolerChillerSwitch_v1

Monthly free-cooling share

Free-cooling share of hours (twelve months)

Month	Share
January	0%
February	0%
March	0%
April	0%
May	0%
June	0%
July	0%
August	0%
September	0%
October	0%
November	0%
December	0%

ae-dubai Annual Training 80%

computed engine.thermal.monthlyFreeCoolingShare.twoBinRatio_v1

Interface definition only. Implementation details are not published.

Hydraulic

Flow, pressure drop, and pipe diameter at the interface. Pump duty is published as power; make, model, and supplier are not.

Flow

2488.3 L/min

ae-dubai Summer peak Training 80%

computed engine.hydraulic.tcs3branch_v1

Flow

149.3 m³/h

ae-dubai Summer peak Training 80%

computed engine.hydraulic.tcs3branch_v1

Pressure drop

220 kPa

ae-dubai Summer peak Training 80%

computed engine.hydraulic.tcs3branch_v1

Pipe diameter

150 mm

ae-dubai Summer peak Training 80%

computed engine.hydraulic.pipeDiameter.v5_dn150

Pump power (duty)

32.53 kW

ae-dubai Summer peak Training 80%

computed engine.hydraulic.tcs3branch_v1

Interface definition only. Implementation details are not published.

3D views

Orthographic and section views are generated from the same solve as the numbers in this document. The interactive view is read-only — the solution is already solved.

ortho-front — Front elevation

ortho-top — Plan

ortho-side — Side elevation

section-longitudinal — Longitudinal section

section-transverse — Transverse section

Interface definition only. Implementation details are not published.

Site interfaces

Footprint, floor load, and noise at the envelope. Connection ratings are restated from the system-boundary section.

Footprint

34.13 m²

ae-dubai Summer peak Training 80%

computed engine.site.footprint.containerEnvelope_v1

Floor load

12 kPa

ae-dubai Summer peak Training 80%

computed engine.site.floorLoad.dc45_v1

Noise

65 dB(A)

ae-dubai Summer peak Training 80%

computed engine.site.noise.dc45_v1

Interface definition only. Implementation details are not published.

Performance

PUE, WUE, and annual energy. Every computed number carries its operating conditions in the same block — not as a footnote.

PUE

1.292 ratio

ae-dubai Summer peak Training 80%

computed pue.instantaneous.totalOverIT_v1

PUE

1.245 ratio

ae-dubai Summer peak Inference 80%

computed pue.instantaneous.totalOverIT_v1

PUE

1.091 ratio

ae-dubai Free cooling Training 80%

computed pue.instantaneous.totalOverIT_v1

PUE

1.095 ratio

ae-dubai Free cooling Inference 80%

computed pue.instantaneous.totalOverIT_v1

WUE

0 L/kWh IT

ae-dubai Summer peak Training 80%

computed engine.performance.wue.dryCooler_v1

Annual energy

9,298,560 kWh

ae-dubai Annual Training 80%

computed pue.annual.energyWeighted_v1

Annex

Geometry snapshots and the inspection-point schedule. These are static artifacts, not the solver.

OpenUSD reference model — DC45-1200KW.usdc.zip
Inspection-point schedule — EXT-002-检测点位收集表-DC45.xlsx

Basis and disclaimer

Computed numbers in this document are operating-point results for the stated city, season, workload, and utilization. They are not guarantees or SLAs. Marketed numbers live in the claims registry.

Cited claims: C3 · C4 · C31 · C36 · C37 · C38 · C39 · C7 · C8 · C9.

C9 liquid PUE ≈ 1.15–1.20 is typical mid-climate only — not free-cooling or summer-peak. Confirm the site point in TCO / Liquid Cooling Designer. It is not an unconditional product band.

Expansion block and first delivery are 90 days ex-works from receipt of down payment (C3, C4); on-site installation and commissioning 2–4 weeks (C36). Freight and customs are buyer-arranged; MDCX publishes no estimate (C39). Retired schedule and fleet-PUE claims are not restated.

Reserved items

This document publishes what a correct result looks like. It does not publish how MDCX produces it, or with what.

Withheld	Statement
BOM, makes, models, suppliers	Bill of materials, makes, models, and suppliers are not published.
Control logic, alarm thresholds, tuning	Control logic, alarm thresholds, and tuning policy are not published.
Solver kernel	The solver kernel is not published. Operating conditions and result numbers are.
Manufacturing and quality path, takt	Manufacturing path, quality process, and line takt are not published.
Price and commercial terms	Price and commercial terms are not published.

Interface definition only. Implementation details are not published.