Choosing a colocation provider is one of the highest-stakes infrastructure decisions a business makes. The wrong choice locks you into a facility that cannot support your growth, charges hidden fees, or fails when you need uptime most. Whether you are deploying ASIC miners, GPU servers for AI training, or enterprise IT workloads, a structured evaluation process prevents costly mistakes.
This checklist covers every criterion you should evaluate before signing a colocation contract, organized into the categories that matter most: power, cooling, connectivity, security, operations, pricing, and compliance.
Category 1: Power Infrastructure
Power is the foundation of every colocation deployment. Get this wrong and nothing else matters.
Available Power Density
Confirm the facility can deliver your required power per rack. Standard enterprise racks use 5-10 kW. ASIC mining racks need 20-40 kW. GPU AI racks demand 30-100+ kW with next-generation NVIDIA platforms pushing beyond 120 kW per rack. Ask for the maximum power density per cabinet, not just the average.
Power Redundancy
Evaluate the redundancy configuration. N+1 means one extra component beyond what is needed (standard for most workloads). 2N means fully duplicated power paths (required for mission-critical enterprise). Verify that the UPS, generators, and automatic transfer switches (ATS) match your uptime requirements. Ask when backup generators were last load-tested and how much fuel reserve is maintained.
Power Quality and Metering
Ask about power factor requirements. Some providers penalize clients with power factors below 0.95. Confirm whether power metering is per-circuit, per-rack, or per-cage, and whether you receive real-time consumption data. Three-phase power delivery is standard for high-density deployments.
Scalability
Can the facility grow with you? If you start with 100 kW, can you expand to 500 kW or 1 MW at the same site without a forklift upgrade? Ask about available capacity, expansion timelines, and whether expansion requires new construction or simply provisioning existing infrastructure.
Category 2: Cooling Systems
Cooling determines whether your equipment can operate at its rated performance. Insufficient cooling causes throttling, hardware damage, and downtime.
Cooling Architecture
Identify the cooling technology in use. Traditional CRAH/CRAC air cooling supports up to 10-15 kW per rack. In-row cooling extends to 20-30 kW. Direct liquid cooling (DLC), rear-door heat exchangers, and immersion cooling are necessary for high-density AI and mining deployments. For facilities in the UAE and Middle East, verify that cooling systems are rated for ambient temperatures exceeding 45 degrees Celsius.
Hot/Cold Aisle Containment
Facilities with proper hot/cold aisle containment operate significantly more efficiently. Ask whether containment is deployed throughout or only in select areas. Mixing hot and cold air wastes cooling capacity and raises your PUE.
Cooling Redundancy
Verify N+1 cooling redundancy at minimum. A single chiller failure should not impact your deployment. Ask what happens if the primary cooling system fails -- is failover automatic, and what is the thermal ride-through time?
Category 3: Network Connectivity
For AI training clusters, network performance is as critical as compute performance. For mining operations, reliable low-latency connections to mining pools directly impact profitability.
Carrier Diversity
A quality colocation facility offers access to multiple network carriers (minimum 3-5). More carriers mean better pricing through competition and better redundancy if one provider has an outage. Ask for the carrier list and whether the facility operates a meet-me room.
Cross-Connect Options
Understand the cross-connect pricing and provisioning time. How much does each physical cross-connect cost? How long does provisioning take? For GPU clusters, ask about InfiniBand or high-speed Ethernet interconnects between your racks.
Bandwidth and IP Transit
Does the provider offer blended IP transit, and at what cost per Mbps? For large deployments, dedicated internet access (DIA) from a preferred carrier via cross-connect is typically more cost-effective than provider-bundled bandwidth.
Category 4: Physical Security
Your hardware is a significant capital investment. Physical security protects that investment.
Perimeter and Building Access
Evaluate the full access control chain: perimeter fencing, vehicle barriers, visitor management, mantrap entries, biometric authentication (fingerprint, retina, or facial recognition), and individual cabinet locks. The best facilities require at least three authentication factors before anyone reaches your equipment.
Monitoring and Surveillance
Confirm 24/7/365 on-site security staffing (not just cameras). Ask about camera retention periods (90 days minimum for compliance), motion detection, and whether the NOC monitors camera feeds in real time. Verify that security footage is available to you on request.
Visitor and Access Policies
How are visitors authorized? Can you grant and revoke access remotely? Is there an access log you can audit? For mining operations where you may rarely visit, remote access management is essential.
Category 5: Operations and Support
Remote Hands
When your equipment needs physical attention at 2 AM, who handles it? Ask about remote-hands availability (24/7 or business hours only), response time SLAs, and pricing (per-incident or included). For mining operations, remote-hands capabilities should include rebooting miners, swapping failed hash boards, and cable management.
NOC Capabilities
A staffed Network Operations Center (NOC) monitors infrastructure health, responds to alarms, and coordinates with your team during incidents. Ask whether the NOC is on-site or remote, what monitoring tools they use, and what their escalation procedures are.
Reporting and Dashboards
Modern colocation providers offer client portals with real-time power consumption, environmental data (temperature, humidity), uptime metrics, and ticket tracking. If a provider cannot show you a dashboard, their operational maturity may be lacking.
Category 6: Pricing and Contract Terms
Total Cost of Ownership
Never evaluate colocation on headline kW pricing alone. Calculate total monthly cost including:
- Power (per kW or per kWh, with or without PUE multiplier)
- Space (per rack, per cage, or per square foot)
- Cross-connects (per physical connection per month)
- Bandwidth (per Mbps or committed data rate)
- Remote hands (per incident or included)
- Setup/installation fees (one-time)
- Power factor surcharges (if applicable)
Contract Flexibility
Understand the minimum term (typically 12-36 months for large deployments), early termination penalties, renewal terms, and price escalation clauses. Does the contract include a right to expand at locked-in pricing? Can you reduce capacity if market conditions change?
Pricing Model Transparency
Ask whether power is billed per kW (allocated capacity) or per kWh (actual consumption). Per-kW pricing is simpler but penalizes you if utilization is low. Per-kWh pricing rewards efficiency. Verify whether the PUE multiplier is applied to your bill (common practice: you pay for IT power plus a PUE-adjusted overhead).
Category 7: Compliance and Certifications
Industry Certifications
Depending on your workload, you may require SOC 2 Type II, ISO 27001, PCI DSS, HIPAA, or TDRA compliance (for UAE operations). Ask for current audit reports, not just certification claims. Certifications expire, and a lapsed audit is worse than no certification.
Environmental Compliance
For ESG-conscious organizations, ask about the facility's carbon neutrality commitments, renewable energy sourcing, measured PUE (not design PUE), and water usage effectiveness (WUE). Request 12-month historical PUE data, not marketing claims.
The Final Evaluation: Red Flags and Green Flags
Red Flags
- Unwilling to provide customer references
- Cannot show real-time PUE or power metering data
- No on-site security personnel (cameras only)
- Single carrier with no meet-me room
- No UPS or generator testing records
- Vague answers about expansion capacity
- Contract requires 3+ year minimum with no exit provisions
Green Flags
- Transparent pricing with no hidden fees
- Multiple active customer references in your workload category
- Current SOC 2 Type II or equivalent audit report
- Real-time client portal with power and environmental data
- N+1 or 2N power and cooling redundancy with test records
- Multiple carriers and flexible cross-connect options
- Clear expansion path at predictable pricing
Why Rax for Colocation
Rax Data builds colocation infrastructure specifically for high-density workloads -- ASIC mining, GPU AI training, and enterprise HPC. Our facilities offer transparent per-kW pricing, N+1 redundancy across power and cooling, multiple carrier options, 24/7 NOC staffing, and competitive rates for deployments of any scale. Every item on this checklist is something we are prepared to answer.
Ready to Evaluate Rax?
Bring this checklist to your consultation with our team. We will walk through every criterion and provide the documentation you need to make a confident decision.
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