Proof-of-Useful-Work · GPU rig economics

Pearl Rig

A profitability planner for PRL GPU mining. Feed it your rig's wall power, your electricity rate and your pool's measured output — it prices them against the exact block-subsidy formula from the Pearl node source and the live PRL/USD market. No made-up hashrates, no fantasy yields: every preset is sourced, every assumption is editable.

Block target3m 14s

Blocks / day—

Subsidy @ height ——

Network emission / day—

💰 PRL price

Live price feeds the revenue math. CoinGecko aggregates across exchanges and works in-browser; CoinEx needs a CORS proxy (same setup as Pearl Pulse).

—

—manual

Source

Manual price (USD)

CORS proxy base (for CoinEx)

Chain height

Subsidy falls as height climbs — set the tip your rig is mining on.

Block height

Default 120,142 — last tip seen 2026-09-27. Update from your pearld (getblockcount) or the Pearl explorer for a live figure.

Subsidy at this height—

Daily network emission—

Coinbase maturity100 blocks

⚙ Your rig

Wall power is the honest cost basis — measured at the wall, not the GPU's spec sheet. Add each GPU model in your fleet.

GPU model	Count	Wall W each	Total W
Fleet total			0 W

⚠ Revenue model

The honest number: your pool dashboard's 24h+ average payout. Everything else is modeling.

PRL earned / day (pool dashboard, 24h+ avg)

Pool fee %

Electricity $ / kWh

Hardware capex $ (for break-even)

📈 Results

Gross revenue / day——

Pool fees / day—

Power cost / day——

Net profit / day——

Net / month—

Net / year—

Break-even——

Power share of revenue—

Price sensitivity (net $/day at other PRL prices)

PRL price	−50%	−25%	current	+25%	+50%
—	—	—	—	—	—

Sensitivity holds output, fees, power and capex fixed — only the PRL price moves. Mining is volatile: this is a planning aid, not financial advice.

📖 Sources & honest limits

Emission math — exact replica of CalcBlockSubsidy in node/blockchain/validate.go (pearl-research-labs/pearl @ 3fe2267): total supply 2.1B PRL, emission constant 650,226 blocks, 194 s block target, 100-block coinbase maturity. Verified against upstream emission_test.go vectors in the test suite.
CMP 90HX preset — 180 W/GPU wall (179.47 / 179.55 W sampled), 2-card rig 358–360 W, from docs/rig-benchmarks.md in chernuha-dev/miner-cpm90hx-pearl (2026-09-27). Its 5-minute pool comparison (Forge 7 accepted shares vs 1) is explicitly labeled noisy by the author — use it for power, not yield.
Yield preset 0.0241 PRL/TH/day — spark-pearl-miner docs/en/VIABILITY.md (2026-09-26), derived from hashrate.no; cross-checks against their reported 80 TH/s → 1.85–1.94 PRL/day (HeroMiners). Drifts with difficulty and subsidy.
Price — CoinGecko pearl-2 (aggregated spot, CORS-open) by default; CoinEx PEARLUSDT alternate (the L1's real market — PRLUSDT is a different token).
Limits — no network hashrate or difficulty feed is modeled; measured pool output is always more reliable than TH/s estimates. Difficulty retargets and the falling subsidy both erode yield over time; this planner snapshots today. Estimating rewards from hashrate instead? The mining calculator covers the reward side.