How many H/s does an RX 580 get on RandomX?
An AMD Radeon RX 580 typically gets around 300–600 H/s on RandomX, with roughly 400–500 H/s being a reasonable starting estimate for a desktop mining setup. H/s means “hashes per second”—the number of mining calculations your card completes each second—not a guaranteed payout.
What that estimate means for your RX 580
That range is a practical guide, not a fixed specification. Two RX 580 cards can produce different results because of their settings and the software running them.
Your result depends on:
- Mining software: The program needs a working RandomX implementation for AMD graphics cards.
- Drivers: These let your operating system and mining software communicate with the card.
- Clock speeds and power limits: These control how fast the card runs and how much electricity it can use.
- Cooling: An overheating card may slow itself down to stay within safe temperatures.
- Other activity: Games, video work, or another mining process can affect your test.
The 4 GB and 8 GB versions should be in the same general performance range. Having twice as much graphics memory does not mean twice as many hashes. Different memory speeds and card settings can matter more than capacity.
Why the RX 580 is slow on RandomX
Monero has used RandomX, its mining calculation method, since November 30, 2019. RandomX favors a CPU, your computer’s general-purpose processor, rather than a GPU, the graphics processor inside your RX 580.
The RX 580 can perform RandomX calculations, but its design is not a good match for this workload. A suitable modern desktop CPU can be several times faster and may use electricity much more efficiently.
Be careful with older RX 580 benchmarks. Results for CryptoNight, Monero’s earlier mining method, do not tell you what the same card will achieve on RandomX. Neither do Ethereum mining figures quoted in MH/s, or millions of hashes per second. Different mining methods involve different work, so those numbers are not directly comparable.
How to check your actual speed
Use the estimate above for planning, then measure your own card before making a profitability decision.
- Confirm that your software is testing Monero’s RandomX, not a different calculation method.
- Check that the reported speed belongs to the RX 580, not your CPU or the combined computer.
- Let the test run long enough for temperatures and speeds to settle.
- Watch for rejected work or errors, rather than trusting a brief peak speed.
If you are mining through a browser, do not assume this desktop GPU estimate applies. A browser miner may use your CPU and never access the RX 580 at all. Browser limits and implementation choices can also reduce performance.
The bottom line
Budget for roughly 400–500 H/s, while allowing for a broader 300–600 H/s range. The RX 580 is generally a poor choice for dedicated RandomX mining, especially if you are buying hardware. Before running it continuously, compare measured electricity use and hashrate in a live mining calculator; your speed alone cannot tell you whether mining will cover your costs.
