Is your data centre AI-ready?
Your business wants to run AI. Your data centre was built for 5–10kW racks. AI wants 40, 80, 130kW — with cooling, power, weight and networking those halls were never designed for. The good news: in most cases you don’t need a new building — you need a retrofit. This guide shows what “AI-ready” actually requires, how big your gap is (there’s a checker below), and how to close it without starting over.
Built for Then, Asked to Do Now
There’s nothing wrong with your data centre — it was built well, for the workloads of its day. The problem is that AI changed what a rack does. A single 8-GPU server draws what a whole rack used to; an AI training rack can draw 16× a traditional one. Drop that into a hall designed for 5–10kW and you hit four walls at once: not enough power, not enough cooling, not enough floor strength, and a network that can’t feed the GPUs.
Power runs out
The feeds, busway and PDUs sized for 5–10kW racks simply can’t deliver 40kW+ to a cabinet — often before you even reach the cooling limit.
Air can’t cope
Past ~30kW a rack, you can’t move enough air to keep the chips in spec. AI density needs liquid — which most legacy halls have no provision for.
The floor groans
A loaded liquid-cooled AI rack can weigh as much as a small car. Raised floors and slabs built for lighter kit may not take it without reinforcement.
The network throttles
AI is east-west and hungry. A 1/10G legacy fabric leaves expensive GPUs idle — AI needs a non-blocking 400G/800G fabric on low-loss fibre.
What “AI-Ready” Actually Means
“AI-ready” isn’t a label — it’s six things being true at once. Fall short on any one and it becomes the bottleneck. This is the bar your hall is measured against:
High-density power
The ability to deliver tens of kW to a single rack — high-capacity busway, three-phase rack PDUs and a power chain sized for sustained, near-100% load.
Liquid cooling (or readiness)
Rear-door, direct-to-chip or immersion — or at minimum the floor loading, pathways and water provision to add it. Liquid cooling guide →
Power capacity & resilience
Enough total capacity (and the right redundancy) for far higher load per square metre than the hall was planned around.
Structural capacity
Floor loading and access routes that can take heavy, dense racks — and the plumbing for a liquid loop where needed.
A high-speed fabric
Non-blocking 400G/800G leaf-spine on ultra-low-loss, pre-terminated fibre. AI/GPU fabric →
Space & containment
Room to reconfigure into AI-density rows with proper containment — you often can’t just swap kit into the existing layout.
How AI-Ready Are You?
Answer six quick questions about your hall as it is today. You’ll get a readiness score and a prioritised list of what needs upgrading — the basis of any AI retrofit.
Pick the option that best matches your facility today.
Indicative only — a real assessment looks at far more (redundancy, electrical phases, water, planning, the lot). But it tells you the honest shape of the gap, and where to start. The next step is a proper audit of the actual numbers.
Closing the Gap — Without Starting Over
The headline: you almost never need a new building. AI-readiness is overwhelmingly a retrofit — upgrading power, adding liquid cooling, re-cabling and reconfiguring space, usually in phases while the rest of the hall keeps running. The path is well-trodden.
Start hybrid
Carve out a high-density zone — liquid-cooled AI rows alongside your existing air-cooled estate — rather than converting the whole hall at once.
Upgrade the power path
Higher-capacity busway, three-phase rack PDUs and distribution to the AI zone, with the capacity and redundancy the load needs.
Add liquid cooling
Rear-door heat exchangers or direct-to-chip with CDUs and a loop — designed in with the white space, not bolted on.
Re-cable for the fabric
Ultra-low-loss OM4/OS2 and pre-terminated MPO trunks for the 400G/800G fabric — tested, certified and warranty-backed.
Reconfigure & contain
Re-lay the rows for density with proper hot/cold-aisle containment, and reinforce floor loading where the heavy racks land.
Phase it, stay live
Sequence the works zone by zone so the hall keeps serving while AI capacity comes online — minimal disruption, planned cutovers.
How Optronix Helps
Making an existing hall AI-ready is exactly the work we do — assess, design, and deliver the retrofit with our own engineers, across the UK, EMEA and worldwide. We turn “can our data centre do AI?” into a costed plan and a working high-density hall.
AI-readiness audit
We survey your hall against the real bar — power, cooling, floor loading, fabric, space — and give you a clear, costed gap analysis: what’s ready, what needs upgrading, and what it takes. Book an audit →
Design the retrofit
A coordinated, costed design for the upgrade — power, liquid cooling, cabling and white-space reconfiguration — modelled together so the build runs clean and phased around your live estate.
Deliver it — hall live
Our own engineers install the power, cooling, containment and cabling, zone by zone, tested and commissioned — bringing AI capacity online with minimal disruption to what’s already running.
Or build new
If a retrofit truly can’t get there, we design and build AI-ready halls from the ground up too — see our AI/GPU data-hall guide.
Want to take AI workloads — but not sure your hall can?
Start with an AI-readiness audit. We’ll tell you honestly where you stand, what it’ll take, and what it costs — then design and deliver the retrofit.
Sources & notes
- Rack densities and AI-system power from public accelerator / AI-system vendor specifications (8-GPU servers ~10kW; GB200-class racks ~120–132kW)
- Cooling thresholds and methods per ASHRAE TC 9.9 and common industry practice; fabric per IEEE 802.3 (400/800GbE)
- The readiness checker is an indicative self-assessment to illustrate the gap — not a substitute for an engineered survey
General guidance, not an engineered assessment. Densities, thresholds and the checker score are indicative; real AI-readiness depends on your specific power, cooling, structural, electrical and planning constraints. Confirm with a site survey and an engineered design.