Which GPU gives the best RandomX hashrate?
There is no single GPU you can reliably call the best for Monero’s RandomX without comparing up-to-date results from the same mining software and settings. If you are choosing hardware specifically for RandomX, a good CPU—the main processor in your computer—is usually a much better choice than a graphics card.
Why an expensive GPU is not the answer
RandomX is Monero’s mining algorithm: the set of calculations your computer performs to help secure the network. Monero has used it since November 30, 2019, when it replaced earlier CryptoNight variants.
RandomX deliberately favors CPUs. Its workload mixes unpredictable instructions with frequent memory access. CPUs handle that kind of work well. GPUs are designed to run large numbers of similar calculations at once, which is less useful here.
That means you cannot judge RandomX performance from a graphics card’s gaming speed, price, or amount of video memory. A flagship GPU does not automatically beat a capable desktop CPU.
For a PC or server dedicated to RandomX, spending more on graphics is usually the wrong place to put your budget.
What would prove a GPU is the fastest?
Hashrate means the number of mining calculations completed each second, usually shown as H/s. To identify the fastest GPU, you need measured RandomX hashrates—not specifications or results from a different algorithm.
Only compare benchmarks that disclose:
- The exact algorithm. CryptoNight results are not RandomX results.
- The GPU and mining software. Software support and optimization can change the ranking.
- Power settings and actual power use. A higher hashrate may come with much higher electricity costs.
- A sustained test. A brief peak can disappear once the card gets hot and slows down.
Also check whether the result is truly GPU mining. Some “GPU mining” services use your card to mine another coin, then pay you in XMR. That is not a RandomX benchmark.
Without comparable evidence, naming a specific NVIDIA or AMD card as the winner would be misleading.
Where your hardware budget helps more
For RandomX, look at CPU benchmarks, memory configuration, cooling, and electricity use.
One important CPU feature is L3 cache, a small area of fast memory inside the processor. RandomX needs about 2 MB of L3 cache per mining thread—a thread is one stream of work. Simply adding more threads can hurt performance if they compete for limited resources.
RandomX’s fast mode uses a roughly 2,080 MB dataset in memory. Its light mode uses a 256 MB cache but runs more slowly. Having enough memory matters, but extra capacity alone does not guarantee a higher hashrate.
For a server, compare the whole system’s wall-socket power consumption, not just processor specifications.
If you are mining in a browser
Do not assume a website can use your graphics card for RandomX. Browser mining depends on the site’s implementation, and many browser miners run on the CPU instead.
A faster GPU may therefore make no difference at all. Before buying hardware, confirm which processor the miner actually uses and measure its sustained performance. Be skeptical of promises of large, guaranteed XMR earnings.
The bottom line
There is no defensible universal “best RandomX GPU” without comparable current benchmarks. For practical Monero mining, choose a CPU-focused setup rather than buying a graphics card specifically for RandomX.
