AMD Threadripper 3990X on Monero — Mining Profit, Solo Odds & Cost of Production

47.49 KH/s · RandomX · network 6.83 GH/s. A AMD Threadripper 3990X solo mining Monero (XMR) has about 2 blocks per year, i.e. an expected block roughly every 197 days for the full 0.6100 XMR (≈ 353 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):

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 6.83 GH/s RandomX network that is about 2 blocks per year — expected one block roughly every 197 days, for the full 0.6100 XMR (≈ 353 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 1.85 blocks, worth about $654 — expected revenue covers the power bill about 3.9x over.

The operational breakeven threshold is 0.266 USD/kWh. Expected net operating margin at benchmark tariffs:

• At 0.040 USD/kWh (Hydro / Renewable): +1.52 USD / day
• At 0.069 USD/kWh (Standard Industrial): +1.33 USD / day
• At 0.120 USD/kWh (Residential Grid): +0.98 USD / day

Break-even Coin Price Target: For this hardware to break even on electricity, Monero must trade at or above 150.08 USD at standard industrial power (0.069 USD/kWh), or 261.01 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 197 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: ~5 USD)
• Median expectation (50% Odds): Block within ~137 days (Nominal median, power cost: ~63 USD)
• Bad luck streak (5% Odds): Can stretch up to ~1.62 yr (1-in-20 extended dry spell, power cost: ~274 USD)

Jackpot Safe: Even in a 1-in-20 bad luck drought (~1.62 yr), the Monero block reward (353 USD) covers electricity costs (~274 USD) with a net surplus of ~79 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:

How the odds have moved

Monero's network hashrate climbed 7% since 2026-09-22, from 6.41 GH/s to 6.83 GH/s — so the same rig is now 7% less 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 22 solo pools for Monero with their stratum endpoints, fees, and pool hashrates — see Monero solo mining pools:

• hashvault.pro (Fee: 0.9% · Hashrate: 696.02 MH/s)
• xmr.farm (Fee: 0.9% · Hashrate: 62.34 MH/s)
• herominers.com (Fee: 0.9% · Hashrate: 46.58 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 0.5052%, yearly chance 84.28%.

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 6.83 GH/s RandomX network that is about 2 blocks per year — expected one block roughly every 197 days, for the full 0.6100 XMR (≈ 353 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 0.266 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 1.62 yr, accumulating roughly 274 USD in power costs.