A Flexpool account featured in a December 2021 report appeared to credit unreleased “RTX 4090 Ti” and “RX 7000” GPUs with extraordinary mining speeds. The figures were striking, but the dashboard labels did not verify the hardware, the number of machines, or any actual payout. HotHardware’s estimate of more than $4.3 million a month was a rough calculation from a reported pool rate—not proof that the operator earned that money.
What the Flexpool listing showed
HotHardware reported on December 13, 2021, that a Flexpool account listed three workers under names suggesting unreleased graphics cards. The labels and rates below are what the report said appeared on the dashboard; they are not independently confirmed GPU benchmarks.
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| Worker label shown in the report | Reported average rate |
|---|---|
4090Ti-Overclock-Test |
1.25 TH/s |
RX7000-Overlock-Test |
507.5 GH/s |
RX7000-Control-Test |
688.6 GH/s |
The report also gave the account an average rate of 2.4 TH/s and a peak of 4.3 TH/s. Those are reported pool-account figures, not evidence of what devices produced them. HotHardware’s December 2021 report framed the attribution as implausible: the named next-generation cards had not been released at the time.
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HotHardware estimated that the reported average rate could correspond to around $145,000 per day, or more than $4.3 million per month. These are the publication’s rough estimates, not audited proceeds or verified pool payments. The report notes that electricity costs vary by location, but does not establish the mined coin, actual hardware, power consumption, operating expenses, pool payouts, or income received.
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So “raking in millions” describes the implication of the report’s calculation—not a confirmed financial result. A displayed mining rate alone cannot establish revenue: the payout depends on factors such as the coin, network conditions, pool rules, and costs, none of which the listing as reported resolves.
What hardware may have been behind the account
The worker names did not prove that RTX 4090 Ti or RX 7000 cards were mining. HotHardware said the listing did not show how many GPUs were working and raised dedicated ASIC miners as a possible explanation. That is a possibility, not a confirmed identification of the equipment.
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For scale, HotHardware compared the first worker’s reported 1.25 TH/s with an estimated RTX 3090 rate of about 110–120 MH/s, citing WCCFTech. On that comparison, the listed rate would be roughly equivalent to 10,000 RTX 3090 cards. This is an illustrative comparison reported by HotHardware, not a test of the account or evidence that it used that many GPUs.
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The 2021 report does not identify the coin associated with the Flexpool account, so it does not establish that the workers were mining Ethereum. Ethereum’s later transition is separate context: The Merge took place on September 15, 2022, replacing proof of work with proof of stake. Ethereum.org states: “Since The Merge, validators are assigned to secure Ethereum Mainnet, and mining on proof-of-work is no longer a valid means of block production.” Its documentation estimates that the change reduced Ethereum’s energy consumption by approximately 99.95%. These later facts do not tell us what the 2021 account mined. See Ethereum.org’s Merge documentation.
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