Break-even index / 2× RTX 3090 / Claude Haiku 4.5 / Kentucky
Will a Dual used RTX 3090 beat Claude Haiku 4.5 in Kentucky?
Break-even lands at month 66 — past your 3-year amortization horizon. The rig would be due for replacement before it pays for itself.
How to read it: OWN — the rig pays for itself inside 18 months. HYBRID — break-even lands between 18 and 36 months; real, but slow. RENT — it never pays off before the hardware is due for replacement. Every formula and threshold is public on the methodology page.
The numbers
| Build cost (Dual used RTX 3090) | $2,250 ($2,000–$2,500) |
|---|---|
| Hardware amortized (3 yr) | $62.50/mo |
| Electricity in Kentucky ($0.132/kWh) | $10.69/mo (81 kWh) |
| Local total cost of ownership | $73.19/mo |
| Claude Haiku 4.5 at the same usage | $45.00/mo |
| Break-even | about 66 months |
Assumes the "coding assistant" preset: ~15M tokens/month, 3 h/day active, 5 h/day idle. Claude Haiku 4.5 priced at $1/M in, $5/M out (verified 2026-07-05). Rig ceiling: 70B at Q4, comfortably. Jargon: VRAM is the GPU memory that decides which models fit; Q4 is 4-bit quantization — a smaller, faster copy of a model with a slight quality cost.
See your verdict — then tweak every number →