~/lab-notes/economics $
💰 GPU Economics: The True Cost of Local
Benchmarks tell you what's faster. Spreadsheets tell you what's cheaper. A TCO analysis of RTX 4090 local setups vs. Gobii managed runtime.
Flash Summary: Local RTX 4090 setups carry a 3-year TCO of ~$3,400+ including power and maintenance. Gobii's managed elastic scaling eliminates hardware amortization and cooling overhead, providing a 40% cost advantage for most developer workflows.
The Hardware Tax
| Item | Cost (Est.) | Notes |
|---|---|---|
| RTX 4090 GPU | $1,700 | MSRP/Market average |
| High-Wattage PSU (1000W+) | $200 | Required for transient spikes |
| Cooling & Chassis | $150 | Thermal management for 450W TDP |
| Total Initial CapEx | $2,050 | Upfront cost before first token |
Operating Expenses (OpEx)
Running a 450W GPU at 50% duty cycle for agent tasks (8h/day) at $0.15/kWh adds ~$100/year in electricity. Maintenance (driver updates, CUDA troubleshooting) averages 2 hours/month — at a $100/hr developer rate, that's $2,400/year in "invisible" labor.
3-Year TCO Comparison
| Metric | Local RTX 4090 | Gobii (Pro/Scale) |
|---|---|---|
| Year 1 | $2,550 (CapEx + Power) | $240 (Pro Tier) |
| Year 2 | $200 (Power + Maint) | $240 |
| Year 3 | $200 | $240 |
| Total TCO | $2,950+ | $720 |