On-Prem vs Colocation for Your GPU Cluster: Where to Host It
Owned data center space or a colocation facility? A clear-eyed look at power density, cooling, control, and cost for housing dense GPU hardware.
Once you have decided to own your GPU hardware, a second question follows: where does it physically live? On-premises in your own facility, or in a colocation data center? Dense GPU clusters strain power and cooling far beyond ordinary IT, and the hosting decision shapes your cost, your timeline, and how quickly you can scale. Neither answer is universally right.
Power density is the deciding factor
A single 8-GPU server can draw 6-10 kW, and a populated rack of them can exceed 40 kW — many times the density a typical office server room was built for. Most on-premises facilities simply cannot deliver that power or remove that heat without major electrical and cooling upgrades. Colocation facilities are purpose-built for high density, with the power circuits, redundant cooling, and increasingly the liquid-cooling support that dense GPU racks need.
When on-premises makes sense
- You already operate a data center with spare power and cooling headroom.
- Data sovereignty or security policy requires hardware to stay on your own premises.
- Low latency to on-site systems or proprietary data sources is essential.
- You have the facilities staff to operate dense infrastructure reliably.
When colocation makes sense
- Your facility cannot supply the power or cooling that dense GPU racks demand.
- You want to deploy quickly without a multi-month electrical and mechanical build-out.
- You value redundant power, cooling, and physical security without operating it yourself.
- You expect to scale and want room to grow without renovating your own building.
Compare the true cost of each
On-premises hosting trades a recurring colocation fee for the capital and operating cost of running facility infrastructure yourself — electrical upgrades, cooling, redundancy, and the staff to maintain it. Colocation converts that into a predictable monthly charge for space, power, and cross-connects. The honest comparison includes your facility's efficiency: a colocation provider operating at a low PUE may cool your hardware more cheaply than an older in-house room ever could.
Keep the hardware decision separate from the hosting decision
Whichever site you choose, the cluster specification should be the same: the GPU servers, fabric, and storage are sized by your workload, not your real estate. Lock the configuration first, then place it where the power, cooling, and control requirements are best met. Designing the hardware around an under-powered room is how clusters end up throttled.
Nexus Compute configures and tests GPU servers built to the power and cooling envelope of your chosen site — on-premises or colocation — backs them with warranty, and quotes within 48 business hours, so the cluster runs at full performance wherever it lands.
Planning a hardware investment?
Tell us what you're trying to build. A procurement specialist will help you specify and quote the right configuration — within 48 business hours, no obligation.