AMD Threadripper 3990X on Monero — Mining Profit, Solo Odds & Cost of Production
47.49 KH/s · RandomX · network 6.45 GH/s. A AMD Threadripper 3990X solo mining Monero (XMR) has about 2 blocks per year, i.e. an expected block roughly every 188 days for the full 0.6000 XMR (≈ 337 USD) reward.
AMD Threadripper 3990X on Monero — Mining Truth Benchmark & Specifications
Consolidated PoW oracle metrics for operating a AMD Threadripper 3990X on Monero (XMR) at live network difficulty and benchmark industrial electricity (0.069 USD/kWh):
| Specification / Metric | Value | Context & Meaning |
|---|---|---|
| Algorithm & Hashrate | 47.49 KH/s on RandomX | Nominal device hashrate |
| Rated Power Draw | 280 W (169.59 H/W) | Energy efficiency threshold |
| Daily Pool Yield (Gross) | 1.80 USD / day | Expected gross pool revenue at spot price |
| Power Consumption Cost | 0.46 USD / day | Electricity expense at 0.069 USD/kWh (6.7 kWh/day) |
| Net Daily Operating Margin | +1.33 USD / day | Operational profit/loss after electricity |
| Operational Breakeven | 0.267 USD/kWh | Maximum electricity tariff before negative profit |
| Cost of Production (@ 0.069$ kWh) | 145.0400 USD per XMR | Direct electricity expense to produce 1 XMR |
| Solo Discovery Expectation | 1 block every ~188 days | Poisson arrival time at network hashrate 6.45 GH/s |
Can you solo mine Monero with a AMD Threadripper 3990X?
Yes — a AMD Threadripper 3990X (47.49 KH/s) can solo mine Monero (XMR) via a solo pool. At Monero's 6.45 GH/s RandomX network that is about 2 blocks per year — expected one block roughly every 188 days, for the full 0.6000 XMR (≈ 337 USD) block. BackPoW computes this from live network difficulty using a Poisson block-discovery model. Realistically this is genuinely worth a patient solo run.
Hardware Tier & Ecosystem Ranking on Monero
The AMD Threadripper 3990X is categorized in the Commercial / High-Yield Tier (Top quartile hashrate on this network, highly competitive for regular pool revenue or realistic solo mining.). Among all 22 tracked models on Monero, it ranks #3 in electrical efficiency (169.59 H/W) and #2 in raw hashrate (47.49 KH/s).
Electricity Operating Costs & Breakeven
Running a AMD Threadripper 3990X (280 W) pulls about 6.72 kWh per day (204.5 kWh per month). At the standard rate of 0.069 USD/kWh, electricity costs roughly 0.46 USD per day (14.11 USD/month or 169 USD/year). Statistically that year returns 1.95 blocks, worth about $656 — expected revenue covers the power bill about 3.9x over.
The operational breakeven threshold is 0.267 USD/kWh. Expected net operating margin at benchmark tariffs:
- At 0.040 USD/kWh (Hydro / Renewable): +1.53 USD / day
- At 0.069 USD/kWh (Standard Industrial): +1.33 USD / day
- At 0.120 USD/kWh (Residential Grid): +0.99 USD / day
Break-even Coin Price Target: For this hardware to break even on electricity, Monero must trade at or above 145.04 USD at standard industrial power (0.069 USD/kWh), or 252.24 USD at residential power (0.120 USD/kWh).
Bankroll & Variance Risk Simulator
Solo mining block discovery follows a memoryless Poisson distribution. While the average wait is 188 days, real-world dispersion ranges across 5% and 50% quantiles:
- Lucky streak (5% Odds): Block within ~10 days (1-in-20 fastest discovery, power cost: ~4 USD)
- Median expectation (50% Odds): Block within ~130 days (Nominal median, power cost: ~60 USD)
- Bad luck streak (5% Odds): Can stretch up to ~1.54 yr (1-in-20 extended dry spell, power cost: ~261 USD)
Jackpot Safe: Even in a 1-in-20 bad luck drought (~1.54 yr), the Monero block reward (337 USD) covers electricity costs (~261 USD) with a net surplus of ~76 USD.
AMD Threadripper 3990X Price & Estimated ROI
Current market price: $1,200–$2,100 (estimated market price, median $1,650) (Hardware price estimated). Mined against its most profitable coin instead of solo, it would pay itself back in about 3.3 years.
How other hardware compares on Monero
Devices in the same hashrate class, solo mining Monero at today's difficulty:
| Hardware | Hashrate | Expected block | Chance in 1 year |
|---|---|---|---|
| AMD Threadripper 7980X | 78.42 KH/s | 114 days | 95.98% |
| AMD Threadripper 7970X | 35.40 KH/s | 252 days | 76.56% |
| AMD Threadripper 3970X | 30.98 KH/s | 288 days | 71.90% |
| AMD Threadripper 7960X | 27.73 KH/s | 321 days | 67.91% |
| AMD Ryzen 9 7950X3D | 22.51 KH/s | 1.08 yr | 60.26% |
How the odds have moved
Monero's network hashrate fell 9% since 2026-09-08, from 7.08 GH/s to 6.45 GH/s — so the same rig is now 9% more likely to find a block.
Where to point a AMD Threadripper 3990X at Monero
Solo mining still runs through a solo pool: it handles the block template and pays the full reward to whoever finds the block. BackPoW tracks 19 solo pools for Monero with their stratum endpoints, fees, and pool hashrates — see Monero solo mining pools:
- hashvault.pro (Fee: 0.9% · Hashrate: 747.80 MH/s)
- xmr.farm (Fee: 0.9% · Hashrate: 64.95 MH/s)
- herominers.com (Fee: 0.9% · Hashrate: 47.72 MH/s)
How the odds are calculated
Solo mining is memoryless: every hash is an independent lottery ticket, so the wait for a block follows an exponential distribution rather than a fixed schedule. On average a block takes T = network_hashrate ÷ your_hashrate × block_time, and the probability of finding at least one within a window t is P = 1 − e^(−t/T). BackPoW uses this Poisson relation instead of a naive linear estimate. For this pair: daily chance 0.5314%, yearly chance 85.72%.
Frequently Asked Questions: AMD Threadripper 3990X on Monero
Can you solo mine Monero with a AMD Threadripper 3990X?
Yes — a AMD Threadripper 3990X (47.49 KH/s) can solo mine Monero (XMR) via a solo pool. At Monero's 6.45 GH/s RandomX network that is about 2 blocks per year — expected one block roughly every 188 days, for the full 0.6000 XMR (≈ 337 USD) block. BackPoW computes this from live network difficulty using a Poisson block-discovery model.
Is RandomX ASIC-resistant, and where does the AMD Threadripper 3990X stand?
RandomX is a memory-hard CPU proof-of-work algorithm. The AMD Threadripper 3990X ranks #2 of 22 CPUs on Monero. It sits in the Commercial / High-Yield Tier (top quartile), making it highly competitive for steady pool income and realistic solo mining.
What is the operating power cost and breakeven electricity rate for a AMD Threadripper 3990X on Monero?
At 280 W, operating a AMD Threadripper 3990X consumes 6.72 kWh/day (204.5 kWh/month). At standard electricity (0.069 USD/kWh), the power bill is 0.46 USD/day (14.11 USD/month). The operational breakeven threshold is 0.267 USD/kWh.
What happens if my AMD Threadripper 3990X encounters a severe dry spell on Monero?
Block discovery is an independent Poisson process with no memory. In a 1-in-20 bad luck drought (5% worst luck), finding a block can stretch up to 1.54 yr, accumulating roughly 261 USD in power costs.