| Assumption | Value used | Source / rationale | Tier |
| NVIDIA DC revenue (cumulative 2023–25) |
$356B |
FY24 $47.5B + FY25 $115.2B + FY26 $193.7B — quarterly earnings |
1A |
| NVIDIA revenue split (GPU vs networking) |
~85% / ~15% |
NVIDIA segment reporting; networking = InfiniBand + NVLink |
1B |
| Silicon as % of total AI CapEx |
~55% |
Industry rule of thumb; cross-checked against hyperscaler 10-K CapEx vs known GPU purchases |
2A |
| GPU useful life (depreciation period) |
3.5–4 years |
MSFT/GOOG extended from 4→6yr for servers but GPU-specific life shorter; Meta uses 5yr blended |
2B |
| Commissioning lag (purchase → production) |
6–18 months |
DC construction timelines; substation permitting is the critical path |
3A |
| AI-attributable CapEx method |
Growth above 2022 baseline |
Hyperscalers do not cleanly split AI vs non-AI CapEx; using pre-AI-boom baseline as proxy |
3A |
| Inference fleet → annual COGS |
$14B/yr |
From the Revenue Ledger 2025 inference spend; cross-checks at ~4x ratio to fleet value |
2A |
| Ad Platform fleet allocation |
~$170B |
Meta ($55B GPU + ads infra), Google (TPU fleet for search/ads), MSFT (Bing/Copilot). Largest single workload category. |
3B |
| China NVIDIA GPUs (estimated) |
474K H100e |
Epoch AI tentative estimate; export controls make this inherently uncertain |
3C |
| Idle compute (utilisation gap) |
~$50B |
Residual after allocating to known workloads. Public utilisation data is limited — CoreWeave S-1, earnings commentary |
3C |