01 / Services
GPU Rack Assembly & Integration_
Full-scope GPU rack builds from bare rack to production-ready cluster. We handle the entire physical assembly — rail install, server and switch placement, power and network cabling, NVLink and InfiniBand routing, and POST verification. Over 1,500 racks deployed across every current NVIDIA platform.
What We Build_
We assemble and integrate GPU racks for AI-scale data center deployments. Our scope covers the complete physical build of a GPU rack — not just placing servers on rails, but every cable, every connection, every verification step required to hand off a production-ready system.
This is not rack and stack. GPU racks at the H100 level and above involve dense NVLink topologies, high-power cable routing, InfiniBand fabric connections, and — on GB200 and GB300 platforms — liquid cooling integration.
Every platform generation has different assembly procedures, different cabling layouts, and different commissioning requirements. We know them because we deploy them daily.
Scope of Work_
Mechanical Assembly
Rail installation, server placement, switch placement, and PDU mounting. Every component positioned per the OEM's reference architecture and secured for seismic and transport compliance.
Power Cabling
High-power cable routing from PDU to server, including redundant power feeds where specified. Cable management, strain relief, and labeling per TIA-942 standards.
Network Cabling
All copper and fiber connections between GPU nodes and top-of-rack or end-of-row switches. DAC, AOC, AEC interconnects plus MPO/MTP fiber trunks for high-density fabrics.
NVLink & InfiniBand Routing
GPU-to-GPU NVLink interconnects routed per NVIDIA's topology specifications. InfiniBand cabling for cluster-level fabric connectivity. These connections are the backbone of GPU compute performance.
Cable Management & Labeling
Every cable dressed, routed, and labeled at both ends. Naming convention aligned to the network topology and documented in the handoff package.
POST Verification
Power-On Self-Test on every server in the rack. All GPUs detected, NVLink and InfiniBand links confirmed active, firmware versions verified. No rack is handed off without confirmed POST.
NVIDIA Platforms We Deploy_
H100 (Hopper)
80GB HBM3, 700W TDPAvailable in air-cooled and liquid-cooled configurations. The baseline for current-generation AI training infrastructure. We deploy both DGX H100 and HGX H100 configurations.
H200 (Hopper with HBM3e)
141GB HBM3e memoryDrop-in upgrade to the H100 platform with 76% more memory bandwidth. Same physical form factor — assembly procedures are similar to H100 with updated firmware and validation steps.
GH200 (Grace Hopper Superchip)
CPU+GPU unified architectureConnected via NVLink-C2C. Different physical layout than standard HGX platforms. Requires specific attention to NVLink-C2C cabling and power delivery.
GB200 NVL72
72 Blackwell GPUs, ~120kW100% liquid cooled — no air-cooled option. This is a fundamentally different build from any previous NVIDIA platform. Assembly includes liquid cooling manifold routing, CDU integration, and thermal commissioning.
GB300 NVL72
288GB HBM3e per GPUBlackwell Ultra. Currently deploying. The highest-density GPU platform available. Builds on the GB200 NVL72 architecture with increased thermal requirements and updated NVLink topology.
Our Process_
Scoping
Review hardware BOM, facility layout, rack count, and deployment timeline.
Work Planning
Detailed crew plan with sequencing, milestones, and quality checkpoints.
Assembly & Cabling
Physical build execution with lead technician inspection at each phase gate.
Testing & Verification
Every connection tested. Every server POST verified. Results documented.
Commissioning & Handoff
Documentation package delivered. Walk-through with ops team.
Standards We Work To_
Every build follows the OEM reference architecture for the platform, together with the data center standards that govern the cable plant around it: TIA-942 for data center infrastructure, ANSI/TIA-568 for cabling components and testing, and BICSI installation practices for pathways, bonding, and labeling.
Fiber terminations are inspected to IEC 61300-3-35 end-face cleanliness before mating. Power, structural loading, and clearances are executed to the OEM spec and the relevant electrical and building codes — we defer to those documents rather than publish fixed figures that vary by platform and site.
Platform coverage: H100, H200, GH200, GB200 NVL72, and GB300 NVL72 — air-cooled and liquid-cooled configurations.
Where we work: Leviathan Systems is based in Texas and deploys across the United States. We mobilize crews to AI data center sites nationwide for GPU rack assembly and data center rack-and-stack.
Track Record_
Platforms deployed: H100, H200, GH200, GB200 NVL72, GB300 NVL72
OEM ecosystem: Dell, NVIDIA, Supermicro, Arista
Work With Us_
GPU rack assembly is the foundation of every AI infrastructure deployment. If your racks are not built right, nothing downstream works. We build them right.
Talk to an engineer →Rack-and-Stack FAQ_
Who does rack and stack for data centers?
Leviathan Systems provides data center rack-and-stack and GPU rack assembly services across Texas and the United States. We receive and rig the hardware, install rails, place servers and switches, run power and network cabling, and verify POST before handoff. For dense AI racks — H100 through GB300 NVL72 — rack and stack extends into NVLink and InfiniBand routing and, on NVL72 platforms, liquid cooling integration.
What is the difference between rack and stack and GPU rack assembly?
Traditional rack and stack means mounting servers on rails and cabling them into a rack. GPU rack assembly at the H100 level and above adds dense NVLink topologies, high-power cable routing, InfiniBand fabric connections, and — on GB200 and GB300 NVL72 platforms — direct liquid cooling integration. We deliver both, and scope each build to the platform.
Which NVIDIA platforms do you assemble?
We assemble and integrate H100, H200, GH200, GB200 NVL72, and GB300 NVL72 racks. Each generation has different assembly procedures, cabling layouts, and commissioning requirements. NVL72 platforms are 100% liquid cooled with no air-cooled option.
Do you work to TIA-942 and other data center standards?
Yes. Mechanical assembly, power cabling, and network cabling follow the OEM reference architecture together with TIA-942, ANSI/TIA-568, and BICSI practices for pathways, bend radius, labeling, and documentation. Fiber terminations are inspected to IEC 61300-3-35 end-face cleanliness before mating.
Where does Leviathan Systems perform rack-and-stack work?
We are based in Texas and deploy across the United States, mobilizing crews to AI data center sites nationwide for GPU rack assembly, cabling, testing, and commissioning.
Ready to Deploy Your GPU Infrastructure?_
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