AloomSystems / Rev B Request a study scope discussion

Aloom MW1 / Basis of design / Rev B

A ≤1 MW facility-input concept.
Four C250 allocations.

Aloom publishes a Rev B concept basis for modular inference infrastructure using commercially supplied rack-scale compute references. Site, utility, OEM configuration, project scope, delivery and operating responsibility remain open and project-specific.

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Concept design—not for construction. No built or measured customer MW1 is represented, and Aloom has not delivered a customer MW1. Final facility input, critical IT, OEM configuration, performance, availability, delivery and operating responsibility require accepted project inputs and executed terms.

Smallest complete unit

C250 defines the proposed isolation boundary.

A rack is equipment. The C250 concept defines a proposed coordinated electrical, thermal and compute isolation and accounting boundary. A future project would select and commission the compute, fabric, local safety, conversion, liquid-cooling and telemetry interfaces together; durable data, ingress and quorum remain outside that proposed cell boundary.

C250 / Functional concept / Rev B

One physical failure domain. One declared accounting envelope.

CONCEPT DESIGN · NOT FOR CONSTRUCTION
C250 isolation boundary and four-cell MW1 relationship A diagram showing one C250 as a protected, metered 1+0 compute, power-conversion and liquid-cooling failure-domain concept. Its 250 kilowatt figure is a declared facility-input accounting envelope made from a measured cell feeder plus an allocated measured share of common loads. Four C250 concept allocations form the declared no-more-than 1,000 kilowatt MW1 facility-input concept boundary. Durable data, ingress, control quorum, common heat rejection, house plant and fire safety remain outside each proposed cell. No delivered or measured customer C250 is represented. C250 isolation boundary and four-cell MW1 relationship A compact diagram showing one C250 as a protected, metered 1+0 compute, power-conversion and liquid-cooling failure-domain concept. Its 250 kilowatt figure is a declared facility-input accounting envelope made from a measured cell feeder plus an allocated measured share of common loads. Four C250 concept allocations form the declared no-more-than 1,000 kilowatt MW1 facility-input concept boundary. Durable data, ingress, control quorum, common heat rejection, house plant and fire safety remain outside each proposed cell. No delivered or measured customer C250 is represented.
Evidence boundary. No delivered or measured customer C250 is represented. The diagram is a functional concept; site, utility, protection, earthing, OEM and thermal acceptance remain open.
Compute position1

One 48U liquid-cooled NVIDIA rack-scale domain on the current configuration.

Rack provision≤192 kW

Current HPE upstream design allowance for GB300 NVL72; final value follows the selected OEM.

Standalone transformer basis400 kVA

The MW1 concept uses one dedicated reference transformer per C250. Campus-scale systems may preserve the same protected feeder boundary through shared upstream transformation.

Failure consequenceOpen

A declared cell fault may stop one rack domain. Containment and surviving useful output require accepted design and tests.

Metering rule Each C250 allocation equals its measured cell feeder plus one measured share of common mechanical and house load. The 192 kW rack provision is an upstream allowance—not predicted continuous draw. Simultaneous rack and sidecar peaks close through the accepted OEM profile and site demand controller.

Compute plane

Commercial hardware references. Integration scope remains project-specific.

The MW1 concept treats the rack as one component inside a proposed electrical, thermal, network and control boundary. A project-specific basis would select the compute platform and define Aloom’s integration responsibility in executed terms.

NVIDIA screening referenceCurrent written quote required*

NVIDIA GB300 NVL72

Rack
48U / 600 mm wide
Compute
72 B300 GPUs / 36 Grace CPUs
Power
142 kW NVIDIA maximum
HPE EDPp / busway
~155 kW / provision to 192 kW
Cooling
Direct liquid + residual air
Loaded mass
~1.5–1.58 t by OEM

*Configuration and availability require a current written OEM or reseller quote. Nothing is ordered or reserved; price and lead time remain open.

NVIDIA product source
Alternate OEM referenceNot in base MW1 BOM

AMD Helios

Frame
Double-wide Open Rack Wide
Compute
72 MI455X GPUs / 18 EPYC CPUs
Power
Public envelope not closed
Cooling
Direct liquid / OEM schedule required
Status
AMD reference design
MW1 count
Not claimed before OEM data

An AMD-based concept could be studied only after an applicable OEM site-planning package and current written quote are accepted; it is not in the base MW1 reference.

AMD product source

Engineering basis

Grid to rack. Heat back out.

The published Rev B concept basis is represented by an electrical single-line and cooling functional schematic. These are not construction or commissioning documents. Any future project would define revision control and commissioning evidence only under an executed scope.

Drawing / E-001

Electrical single-line / Concept

REV B · NOT FOR CONSTRUCTION
MW1 Rev B electrical functional reference from site medium-voltage service to four C250 rack domains Concept Rev B single-line showing an open site-selected 11, 22 or 33 kilovolt medium-voltage service, a declared concept boundary of no more than one megawatt facility input at the proposed project meter, functional-reference switchgear and an MV cell bus. Four parallel base C250 feeder references each use a 400 kilovolt-ampere transformer reference and LV switchboard before OEM rack shelves rectify AC to 50 volt DC. Optional feeder F205 is a fifth-cell reference that does not create firm service alone. Reference house feeder F100 would supply a transformer whose rating, duty and redundancy close during site study. Transformer nameplate totals are not installed capacity or deliverable megawatts, and no final connection, topology, firm-capacity, uptime or service result is declared. Compact MW1 Rev B electrical functional reference Compact concept Rev B single-line showing an open site-selected medium-voltage service, a declared concept boundary of no more than one megawatt facility input at a proposed project meter, reference switchgear and one MV bus feeding six parallel branches. Four branches are base C250 transformer references, one is an optional fifth-cell reference that does not create firm service alone, and one is a house and mechanical reference whose rating closes during site study. Nameplate totals are not installed or deliverable capacity. Final connection, topology, redundancy, protection, uptime and service levels remain open.
SHARED SERVICES / REDUNDANCY + FAILURE DOMAINS OPENProtection · metering · control-quorum requirement · fire/life safety
Declared concept boundary≤1.0 MWfacility input at the project meter; secured utility capacity remains open
Base-cell transformer reference4 × 400 kVA1.6 MVA aggregate reference nameplate; not installed or deliverable capacity
House / mechanical supplyTX-100 / TBDseparately sized from accepted plant duty and start sequence
Aggregate with optional fifth5 × 400 kVA2.0 MVA cell reference; does not create firm service alone
Rev B conversion reference. The MW1 concept would distribute AC to OEM rack power shelves, which rectify to the rack's internal 50 V DC bus. External 800 V DC is not part of the current GB300 reference basis. The reference topology totals at least 1.6 MVA of cell-transformer nameplate before house supply; this is not installed equipment, secured utility capacity or coincident demand. Any fifth-cell availability objective requires accepted house-power, protection, control, data and workload-recovery design. A 275 kV interface belongs at a multi-tens-of-megawatts campus substation—not beside these racks.
Drawing / M-001

Cooling functional schematic / Concept

REV B · NOT FOR CONSTRUCTION
MW1 Rev B functional cooling reference from rack heat capture to common heat rejection Concept functional cooling schematic showing a closed facility-water loop with required heat-rejection, circulation, expansion and water-quality functions. The loop serves four C250 thermal-duty zones and a required residual-air duty. One representative cell interface shows isolation, measurement, heat exchange separating facility water from the OEM technology-cooling loop, and leak-response and safe-state control requirements. The four C250 items are thermal-duty zones, not selected hydraulic branches, and the interface does not prescribe equipment count or one CDU per cell. Equipment topology, duty, redundancy, hydraulics, controls, chemistry, ambient design and residual-air architecture remain open. No installed performance or continuity result is declared. Compact MW1 Rev B functional cooling reference Concept functional cooling schematic showing a closed facility-water loop with required heat-rejection, circulation, expansion and water-quality functions. The loop serves four C250 thermal-duty zones and a required residual-air duty. One representative cell interface shows isolation, measurement, heat exchange separating facility water from the OEM technology-cooling loop, and leak-response and safe-state control requirements. The four C250 items are thermal-duty zones, not selected hydraulic branches, and the interface does not prescribe equipment count or one CDU per cell. Equipment topology, duty, redundancy, hydraulics, controls, chemistry, ambient design and residual-air architecture remain open. No installed performance or continuity result is declared.
Boundary equationQ̇ambient ≈ Pmeter − Pexport − dEstored/dtA conservation relationship—not a selected plant rating. Rack heat, sidecars, room gains, losses and cooling/control parasitics remain inside the boundary.
HPE EDPp arithmetic4 × ~155 kW~620 kW electrical peak-provision arithmetic only—not coincident demand or selected heat-rejection duty.
HPE rack reference≈90% / ≈10%Approximate liquid/air capture at 132–140 kW rack operation. Not a site split and not automatically applied to 155 kW EDPp.
Flow sensitivityṁ = Q/(cpΔT)
V̇ = Q/(ρcpΔT)At 0.6–0.7 MW, water-equivalent recirculating-flow scenarios for ΔT 10 / 15 / 20 K are ≈52–60 / 34–40 / 26–30 m³/h. Not OEM rack flow, selected FWS flow, pump duty, pipe size or water consumption.
Evidence boundary. No cooling-plant technology, CDU count, pump duty, redundancy, water use or end-to-end thermal performance has been selected, installed or measured. HPE and Lenovo values are separate rack-side OEM references, not a combined design or facility-primary flow. The accepted OEM schedule and site basis of design govern. HPE reference ↗ · Lenovo alternative ↗

Inference fault model

No resilience claim without a loss case.

For workloads designed and tested for retry, a declared cell fault may allow work to restart elsewhere with temporary capacity loss. Session state, model/data durability and shared safety systems require explicit design and evidence.

Screening only. Reference groupings and continuity labels do not establish resilience. A production claim requires an accepted loss case, topology, shared-dependency analysis, operating response, commissioning test and workload-level acceptance evidence.
MW1 resilience screening register — Concept Rev B; no built or tested customer system.
LayerConcept or study postureRequired closure and evidenceStatus
Compute cellBase concept: 4 C250 allocations; optional fifth-cell studyA declared cell fault may stop one rack domain. Drain, retry and any surviving-output target require accepted scheduler, workload, data and power/thermal tests.Concept; not tested
Local NVMeProposed cache or scratch role; not the sole durable copySource of truth, rehydration, replacement and recovery testing remain open.Target; not implemented
Model and project data, if deployedReplication or erasure-coding design optionsCopy count, placement, independence, consistency, backup and restore, and cell-loss evidence remain open.Target; not tested
Ingress and controlA/B network and quorum design optionsFailure domains, quorum membership, routing, state persistence, split-brain handling and failover testing remain open.Target; not implemented
Cell power and thermal interfaceTarget 1+0 cell boundary; equipment count and CDU sharing openContainment and shared-dependency consequences require accepted electrical, thermal and controls design and testing.Reference; open
Shared heat rejectionRedundancy objective and one-out duty openAccepted duty, ambient, modules, pumps, controls, ride-through, common modes and loss-case testing are required.Open; no N+1 design
Fire and life safetyApplicable code and authority requirements; site-specificQualified fire strategy, cause and effect, interfaces, commissioning and applicable-authority acceptance remain open.Open; no compliance claim
Four-cell base study4 C250 allocations1.0 MW facility envelope / cell-loss consequence open

Asset-efficiency reference for workloads that may support retry. Scheduler, data, network, power and thermal behaviour require accepted design and tests.

Fifth-cell study option4 + 1 populated-cell referenceTarget only: four rack domains after one declared cell fault; no surviving-output result

Requires accepted house power, protection, scheduler, data, network, thermal and recovery design plus commissioning tests.

Continuity classes / project study options

Availability would be defined only through accepted topology, evidence and project terms; these labels do not establish it.

E1 / Graceful referenceReference · no uptime

Grid-supplied 1+0 cell-path reference and UPS-backed safe-state-control requirement. A declared fault may stop one cell; final design and tests remain open.

R1 / Protected-path studyTarget · not designed

Generator-backed essential plant, A/B distribution and UPS or rack ride-through are study inputs only.

F1 / Four-of-five studyTarget · not firm service

Fifth-cell, shared house-power, ingress, control, durable-data and thermal paths require independent-domain design and tests.

Study classes—not Tier ratings or availability promises. R1 and F1 remain unselected until the project SLD and commissioned evidence are accepted.

Project-basis gates

Five project-basis inputs remain open.

These parallel closure families identify evidence that would be required before Aloom could consider a project-specific proposal. They are not a sequence and do not assure a quote, price, order, availability, programme or delivery.

Project-basis closure register only. These are five parallel project inputs still requiring accepted evidence and agreements; no quotation is assured, they are not a build programme, and they do not represent completed studies, procurement, approvals, commissioned systems or a delivered customer system.
MW1 Concept Rev B project-basis closure register. Every gate is open and no quotation is assured.
GateRequired closureStatusDoes not establish
Workload and acceptanceDeclared workload, precision, latency, availability and useful-output test.Open; project-specific.Performance or service-level agreement.
OEM and supplyOEM configuration, written quote, rack site-planning guide and delivery window.Open; not reserved.Bill of materials, quantity, price or lead-time commitment.
Utility and electricalUtility capacity, fault level, protection study, earthing and connection agreement.Open; network-service-provider and site input required.Secured grid capacity.
Thermal and site limitsCoolant chemistry, temperatures, ΔT, flow, pressure, water and acoustic limits.Open; project-specific.Selected plant, flow or water duty.
Approvals and operabilityPlanning, fire engineering, structural loads, security and maintainability review.Open; authority and project input required.Permit, compliance or construction-readiness claim.

Start / Project configuration

Bring the project inputs.
Start with a scoped discussion.

A future written study proposal could define the workload, utility position, rack reference, cell count, single-line, cooling schematic, programme assumptions and commercial boundaries. No study, build, delivery or operating commitment is made on this page.

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