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Short answer: The CMP 220HX was a 2021 rumor, not a confirmed NVIDIA product. A hardware leaker reportedly attributed up to 210 MH/s on Ethereum’s Ethash algorithm to an A100-derived mining card, which would have been about 1.75 to 1.83 times the roughly 115–120 MH/s then attributed to an RTX 3090. NVIDIA did not publish a CMP 220HX specification or confirm the result. And since Ethereum ended proof-of-work mining in September 2022, that rate is now historical—not a guide to current Ethereum mining income.
What the CMP 220HX rumor claimed
In March 2021, reports described a possible high-end addition to NVIDIA’s CMP (Cryptocurrency Mining Processor) family: a mining-only card allegedly derived from the A100 data-center accelerator. The claim came from hardware-leaker reporting, not a product announcement. The headline figures included a possible 210 MH/s Ethereum hash rate and an alleged $3,000 price. Those figures were unconfirmed; NVIDIA did not publish final specifications, a launch date, or a price for a CMP 220HX. Tom’s Hardware’s report and HotHardware’s contemporaneous coverage attributed the performance claim to the rumor rather than to a tested card.
The distinction matters: a plausible design concept is not the same as a product that buyers could order, benchmark, warranty, or resell. No official CMP 220HX datasheet, retail launch, independent production-card review, or verified availability was established in the cited coverage.
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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteWhy an A100-derived mining card sounded plausible
The technical argument centered on memory. Ethereum’s former Ethash workload was sensitive to memory bandwidth, and the rumor compared an A100-derived configuration with the GeForce RTX 3090. The contemporary report cited approximately 1.55 TB/s of HBM2 bandwidth for the relevant A100 comparison, against 936 GB/s for the RTX 3090’s GDDR6X memory. More bandwidth could help a memory-bound workload, and the A100 also had substantial compute resources.
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That comparison explains why the leak attracted attention; it does not validate 210 MH/s. Hash rate also depends on the particular memory configuration and timings, software kernels, clocks, power limits, cooling, and sustained operating conditions. A reduced-memory or repurposed A100 design might not perform like the accelerator used as its reference. “Up to 210 MH/s” would not, by itself, establish a repeatable rate or a wall-power efficiency advantage.
NVIDIA’s actual CMP concept did make mining-only hardware credible in general. The company said CMP cards would omit display outputs, use an airflow-oriented design for dense installations, and run at lower peak core voltage and frequency to improve mining efficiency. Those design goals support the idea of a purpose-built mining product, but they are not evidence that the 220HX itself shipped. NVIDIA’s announcement describes the CMP family’s intended role.
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A further complication is that A100 cards came in different configurations and form factors. The specifications for a later A100 80GB PCIe model—80GB HBM2e, about 1,935 GB/s bandwidth, and a 300W maximum TDP—must not be retroactively treated as CMP 220HX specifications. The rumor relied on different assumptions, and NVIDIA never supplied a final 220HX configuration. See NVIDIA’s A100 product information for the accelerator’s data-center context.
Rumored CMP 220HX versus the RTX 3090
| Comparison | Rumored CMP 220HX | GeForce RTX 3090 |
|---|---|---|
| Ethereum rate in 2021 coverage | Up to 210 MH/s alleged; not officially specified or independently verified | Roughly 115–120 MH/s in contemporary reports; results varied with tuning, software, cooling, and power limits |
| Product status | Unconfirmed rumor; no documented mainstream launch established | Released consumer GPU |
| Memory and bandwidth cited in the comparison | A100-derived HBM configuration alleged; approximately 1.55 TB/s cited for the relevant comparison, not a confirmed 220HX specification | 24GB GDDR6X; 936 GB/s |
| Price discussed at the time | $3,000 alleged, never confirmed by NVIDIA | $1,499 launch MSRP; actual 2021 market prices were affected by shortages and demand |
| General use | Expected to be mining-only and without display outputs if it followed CMP design | Gaming and other consumer GPU uses, as well as historical mining use |
At 210 MH/s versus 120 MH/s, the rumored card would have been 75% faster by raw hash rate (210 ÷ 120 − 1). Against 115 MH/s, the difference is about 83%. That is roughly 1.75–1.83 times the comparison rate—not automatically “twice as fast.” These ratios compare reported Ethash rates, not overall value, power efficiency, or profit.
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The rumor also discussed an A100-class power figure, but without a confirmed CMP 220HX card and controlled measurements, there is no sound basis for comparing real-world watts at the wall or MH/s per watt. TDP is not the same as a miner’s measured system draw. A high hash rate alone cannot establish profitability: electricity prices, network difficulty, pool fees, coin prices, cooling, downtime, taxes, and eventual resale value all matter. The alleged $3,000 price was especially uncertain; the roughly $11,000 A100 figure cited at the time was a market reference, not necessarily NVIDIA’s official transaction price.
Was a CMP 220HX actually released?
NVIDIA announced CMP in February 2021 as mining-only hardware, but its published CMP product page lists the 30HX, 40HX, 50HX, and 90HX—not a 220HX. NVIDIA developer documentation also refers to supported CMP devices such as the 70HX and 90HX, without listing a 220HX; it notes that NVIDIA development tools do not support CMP GPUs. That documentation is useful context, though tool support is not a complete product-history record.
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The careful conclusion is that the CMP 220HX was a reported concept or leak, not a confirmed product in NVIDIA’s documented CMP lineup, and it apparently never reached a documented mainstream release. The absence of a model from current product and support pages cannot prove that no prototype or engineering sample ever existed. It does mean readers should not treat the card, its price, or its benchmark as established facts. A calculator database or second-hand listing repeating “CMP 220HX” would not substitute for an official product record, a traceable device identity, and independent testing.
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Why 210 MH/s is no longer an Ethereum buying metric
Ethereum’s mainnet moved from proof-of-work to proof-of-stake in September 2022. After The Merge, Ethereum mainnet no longer used GPU mining to validate transactions, so a card’s hypothetical Ethash rate does not translate into current Ethereum mining revenue. The Ethereum Foundation’s Merge announcement gives the transition context.
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Hash rates are algorithm-specific. Even if a CMP 220HX had achieved 210 MH/s on the former Ethereum workload, that would not establish its speed or profitability on another proof-of-work coin. A miner considering any used mining hardware needs current, coin- and algorithm-specific economics—not an old Ethereum headline.
What to verify before paying for a purported mining GPU
- Identity: Ask for the exact manufacturer and model, verifiable PCI device ID, and official documentation. Do not rely only on a seller’s label or a calculator entry.
- Performance evidence: Look for testing on a physical card that identifies the algorithm, software and version, tuning, and whether the rate is sustained. A leak or “up to” claim is not a benchmark.
- Power and cooling: Check measured power at the wall and the airflow requirements, not just a GPU’s stated TDP. Server-oriented or passive designs may need directed airflow a desktop case does not provide.
- Compatibility and support: Confirm that the operating system, drivers, and mining software recognize the exact device. Mining-only CMP cards omit display outputs, and NVIDIA says its developer tools do not support CMP GPUs.
- Total economics: Include purchase cost, host hardware, power delivery, electricity, cooling, pool fees, maintenance, downtime, and resale value. Recalculate against current network conditions instead of projecting from 2021.
- Warranty and resale: Verify seller credibility, warranty terms, and return rights. A mining-only card has fewer general-purpose uses than a consumer GPU, which can limit its resale options.
For historical context, the documented CMP models are more verifiable than the 220HX rumor, but they remain mining-only products rather than flexible gaming cards. The A100 is a data-center accelerator intended for AI, analytics, and high-performance computing, not an ordinary miner’s substitute. Neither should be mistaken for a currently confirmed CMP 220HX purchase option.
Verdict
The 210 MH/s CMP 220HX story was technically interesting because an A100-derived, HBM-equipped mining card could plausibly have suited Ethash. But the performance, specifications, and $3,000 price remained leak claims; NVIDIA’s published CMP lineup does not confirm a 220HX, and no independent production-card result established the headline rate. The RTX 3090 comparison is a historical estimate, not proof of a real product beating it. Since Ethereum mining ended in 2022, the headline is best read as a 2021 hardware rumor—not as a current mining opportunity.
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