XHD vs Chia in 2026
XHD and Chia are hard drive mining protocols that use plotted storage instead of GPUs or ASIC rigs.
XHD XHD
XHD uses Conditioned Proof of Capacity (CPOC). XHD coin is built around disk-capacity rewards.
Chia XCH
Chia uses Proof of Space and Time (PoST). Chia is a full blockchain with a programmable transaction layer, its own language, and a mainnet.
Power consumption on either network is far lower than Proof-of-Work mining.
How do XHD and Chia compare?
An XHD miner plots drive space. The network assigns rewards according to the amount of storage committed.
Chia uses a two-part consensus model. Plot files prove allocated storage, and Timelords generate sequential time proofs through verifiable delay functions.
XHD vs Chia comparison
| XHD | Chia | |
|---|---|---|
| Ticker | XHD | XCH |
| Consensus | Conditioned Proof of Capacity | Proof of Space and Time |
| Storage role | Disk capacity determines reward probability | Plot files prove reserved space |
| Block timing | Five-minute interval | ~18.75 seconds per block, ~52 seconds per transaction block |
| Total supply | 90,000,000,000 XHD (capped) | 21 million XCH at genesis, ongoing block rewards, no hard cap |
| Initial reward | 150,000 XHD per block | 2 XCH per block at launch, scheduled halvings |
| Halving schedule | Every 300,000 blocks (~2.85 years) | Every three years during the first four periods, then 0.125 XCH per block after year 12 |
The network pays 8,000 XHD per terabyte while total capacity stays below 1,000 PB. Above that level, the rate changes. Each 2,016-block window recalculates it from the average capacity recorded during that period.
What is the difference between CPOC and Proof of Space and Time?
CPOC rewards depend on allocated storage and on how long that capacity stays committed.
| Time committed | Cooperative bonus |
|---|---|
| Over 9 months | 100% |
| Over 6 months | 60% |
| Over 3 months | 30% |
| Under 3 months | 10% |
Proof of Space and Time uses plotted storage together with a separate time-proof process. Chia builds each proof of space from plot data arranged across seven lookup tables. Timelords generate the sequential time proofs required for consensus, so each consensus round requires both proofs.
How does plotting differ between XHD and Chia?
A standard Chia k32 plot uses about 101.4 GiB. Plotting time depends on hardware:
A high-end system with 400 GiB of RAM can finish one in about five minutes.
A typical consumer machine may need around six hours.
A low-spec setup with one CPU core can take about 12 hours for a single plot.
Early Chia plotting often used consumer SSDs as temporary space. Heavy plot creation wore through write endurance much faster than normal desktop use. HDDs are a better fit for storing finished plots over the long term.
XHD plotting uses HDD capacity directly. Plotting time will still change with drive size and CPU speed. Filling large drives may take hours or days.
Chia will go through another plotting transition in late 2026
The hard fork at block 9,562,000 starts a 256-day replot window for Proof of Space 2.0. Expected in November 2026. The new format will use k28 plots at about 1.8 GiB each. Chia Network acquired NoSSD in February 2026 and integrated that technology into the PoS2 upgrade. Older plots will lose eligibility on a linear schedule after the fork and become invalid by mid-2027.
How large is each network?
Chia launched its mainnet in March 2021 with smart transactions, Chia Asset Tokens, NFTs, Offers, and DIDs. By early 2026, Chia had:
XHD does not report estimated netspace. Supply, block interval, and reward data appear in the comparison table above.
How does energy consumption compare?
Chia uses a plot filter set to 512. During farming, disk activity drops from about 8 reads every 9 seconds to 8 reads every 80 minutes per plot.
XHD power consumption will depend mainly on drive count and on the power draw of each HDD. More drives will raise total power use, especially in larger shelves and multi-drive setups.
Approximate 30-day electricity cost at 24/7 load
| Setup | Estimated draw | U.S. at 18.2¢ / kWh | G.B. at 27.69p / kWh |
|---|---|---|---|
| 1 HDD + host system | 35W | ~$4.59 | ~£6.98 |
| 4 HDDs + host system | 60W | ~$7.86 | ~£11.96 |
| 8 HDDs + host system | 105W | ~$13.76 | ~£20.93 |
| 12 HDDs + host system | 150W | ~$19.66 | ~£29.91 |
Solo vs pooled rewards
Chia
Chia uses “farming” terminology. Solo farming pays the full block reward when your plots produce a valid proof, but smaller farms can wait weeks or months between payouts. Chia’s official pooling protocol allocates 1/8 of the block reward to the farmer and 7/8 to the pool.
XHD
XHD uses mining terminology. Smaller miners face the same variance problem. Solo mining produces infrequent payouts unless you’re running large capacity with a stable full node. More plotted terabytes will improve your chances, but total network capacity will still affect how often you actually get paid.
Pool payouts are easier to track. Solo setups require patience and enough plotted storage to win a block within a reasonable period.
How do you estimate HDD profitability?
Profitability on either network will depend on:
- Raw HDD storage
- Current network size
- Reward conditions
- Hardware cost
- Electricity price
- Pool fees
- Token price
- Exchange access
- Drive failure risk
Before committing drives to either network, you should research:
- Cost per terabyte
- Watts per terabyte
- Expected reward share at current network size
- Current market conditions for the token
Used enterprise HDDs may lower the entry cost but have a higher failure risk. A drive purchased for mining alone will have a longer payback period than one you already own.
Which one should you mine?
XHD has a simpler consensus model and a capped supply. Chia is listed on more exchanges and has more on-chain features, but miners will need to replot during the 2026-2027 PoS2 transition.
You can start with a small setup on either network. Set up the wallet, plot a limited amount of space, track reward reporting, and compare the result with the electricity cost. It will be easier to plan a larger capacity after the first test.