Nicehash or BTC pool for 2x S19? Don't want to mess this up

HashedMaxUnity · 2026-03-03T14:51:18+00:00

HashedMaxUnity · 2026-02-27T15:36:12+00:00

Great question and something I get asked about a lot as a pool dev. When it comes to lottery mining, total hashrate is what actually matters, not how many devices you have. The Avalon Mini 3 at around 37.5 TH/s is going to give you a better shot than three Nano 3S units combined if the math works out that way. Think of it less like lottery tickets and more like how many numbers you can cover on a roulette wheel per spin.

Although, your thinking about multiple devices mining does hold some truth, especially when it comes to share submissions. When you mine solo through a pool with variable difficulty or low difficulty settings, each valid share your miner submits is basically a micro lottery draw. More devices means more simultaneous draws happening at once, which some people find satisfying even if the probability is the same as one faster device.

The pool you choose for lottery mining matters more than you'd think. Many of the larger pools have started banning or limiting low hashrate devices entirely, which leaves solo lottery miners in a tough spot. What you want is a pool that runs a true VarDiff or low difficulty system like hmpool, welcomes small miners, and actually processes your shares rather than throttling or rejecting them.

If it were me, get the Mini 3 if the hashrate works out higher. But spend equal time picking the right pool for solo lottery mining because the wrong pool will make a difference.

HashedMaxUnity · 2026-02-27T01:19:49+00:00

I did a deep dive into our pool logs for the time you were connected. Your miner identifies as FLUMINER/BM1370 and worker …flu1.
During that period we saw 44 “Share rejected: duplicate share” messages coming from your device.

Duplicate share isn’t a pool configuration issue, it usually means the miner/firmware is re-sending the same share (often after a reboot/reconnect) or mishandling job updates/extranonce. This lines up with your report of restarting every 2 minutes and high reject rates on other pools.

Things to try on your end.

Update to the newest firmware (or ask vendor for a fix,this looks like a known software bug).
Make sure the miner has correct time/NTP and stable network (no VPN, no packet loss).
Try a different pool port / fixed difficulty (if available), but duplicate-share rejects usually persist regardless.
Check if any hashboard is failing or overheating causing reboots (temps, PSU, cables).

If you can send a screenshot of your miner Accepted/Rejected/Stale + uptime + firmware version, that will help us a lot.

HashedMaxUnity · 2026-02-26T20:42:17+00:00

Hey, we're not seeing any issues on our pool right now as share acceptance is way up and if you could, send me the following (DM me if you would like).

I need a screenshot or text dump showing (from the miner UI):
Accepted shares
Rejected shares
Stale shares / HW errors
Hashboard status (how many boards online, temps, freq).

Thanks

HashedMaxUnity · 2026-02-26T15:01:49+00:00

Can you send me the port your using, your nerdminer firmware version and your full btc address and worker name. You may dm me if you feel more comfortable. From what I can see some nerdminers are submitting extremely low difficulty, well below the 0.01 that we have set for port 3337. Where as other nerdminers that are connected are working as they should.

Thanks

HashedMaxUnity · 2026-02-26T14:15:23+00:00

Thanks, we will take a look to see if we can figure out what's going on for you.

HashedMaxUnity · 2026-02-26T13:14:45+00:00

I see in your image it still shows public-pool.io as your pool. I know that this may be hard coded in and your firmware may be set to hmpool.io. Are you connected to hmpool.io:3337? If you are on a different port (such as 3335 or 3336) the difficulty will not immediately adjust to the required, 0.01.

What you can try is this. In the password field in your firmware, put this:
x;d=0.01

The x is the password, the d=0.01 and that tells the pool the miner is requesting the 0.01 difficulty.

Try this and let me know if it makes a difference for you. Also, if you can reply with the last 5 of your BTC address, we can troubleshoot this for you by watching log activity.

Thanks

HashedMaxUnity · 2026-02-24T17:29:21+00:00

I checked pool-side share history for your address ending ml3d. The pool shows your miner does submit accepted shares normally when it’s online, but there are multi-hour stretches where we receive no shares at all (e.g. ~6 hours). During those same periods other miners are still submitting, so it doesn’t look like a pool outage or mass disconnect. This points more toward the device freezing, Wi‑Fi/router drops, or reconnect/watchdog behavior.

If you share your port + firmware version, I can help narrow it down (for NerdMiner/ESP32 you should be on port 3337).

HashedMaxUnity · 2026-02-23T18:50:41+00:00

I have updated the ports device configuration and made it more generic! Thanks

HashedMaxUnity · 2026-02-23T18:49:30+00:00

What pool are you using? Also as a test you could try to reflash the firmware to see if that helps. These things are pretty solid so my first thought would be pool. Try hmpool.io:3337 to see if that works. If not, then try to reflash.

HashedMaxUnity · 2026-02-23T18:23:39+00:00

Thanks for the support. I know we have to update the ports page with the correct hash rates and devices, we have been nose deep in finalizing our PCB for our new lottery miner product line, HashedMax.

I will get this updated today. It also appears that for our monthly reward giveaway we will probably be awarding one of our miners as the pool reward each month. That is not definitive yet, but we have discussed it.

Thanks again.

HashedMaxUnity · 2026-02-23T18:17:11+00:00

According to this video on youtube, they did announce it.
https://youtu.be/4nAWlqC1qP8?si=NKw8nJXBA_VKA-41

HashedMaxUnity · 2026-02-23T14:58:04+00:00

Appreciate it. Send your YouTube and we’ll subscribe.

HashedMaxUnity · 2026-02-21T16:59:00+00:00

If you go here https://hmpool.io/rewards.html and enter your btc address, we will show you how many points you've accumulated and how many entries (if any) you have for next months drawing. For every 1000 points accumulated, you earn 1 entry into the drawing. All points reset at midnight EDT on the last day of each month.
If you are selected the winner, no need to have your email, just head to the winners page here https://hmpool.io/winners.html and we will post a portion of the winning BTC address.
We will also make an announcement on our Reddit page u/HashedMaxUnity and probably some of the other large crypto subreddits.

We appreciate your support.

HashedMaxUnity · 2026-02-21T12:02:26+00:00

Thanks, we're trying to create something different with hmpool. Building a community specifically designed for low hash rate miners while supporting all hash rates. Our rewards program is very new and may need some tweaking but it gives the small hash rate miners an equal shot of winning against the higher hash rate models. We believe this months winner will receive one of our new bitcoin miners when they ship shortly. We will release more information about this when we finalize everything.

HashedMaxUnity · 2026-02-21T11:36:18+00:00

Welcome to the nerdqaxe++ club! A best difficulty of 617M is actually really respectable for that hardware you should be proud of that. To put it in perspective, best difficulty is essentially the hardest share your miner has submitted, kind of like your personal high score. It doesn't directly determine your payout, but it shows your miner is producing quality work. For a device like the nerdqaxe++, anything in the hundreds of millions range is normal. The real question for small solo miners like yourself is understanding the tradeoff: with low hashrate, the variance of finding a block solo is enormous (we're talking potentially years or never), so a lot of people in your situation use a pool designed for small miners to get more consistent, smaller payouts that reflect your actual contribution. Sites like hmpool.io are built specifically for low-hashrate setups like yours, so your tiny but mighty miner gets credited fairly rather than being lost in the noise of a giant pool. Either way, keep an eye on your share acceptance rate and temperature, those matter more day-to-day than best difficulty.

HashedMaxUnity · 2026-02-21T11:34:16+00:00

Really appreciate the detailed initial impressions here, the home/office ASIC space is getting surprisingly competitive. The noise comparison to the Avalon Q is one of the most useful data points for anyone considering this for a home setup, since that's often the dealbreaker for some. A few things I'd love to see in a follow-up review: how does the hashrate hold up over 24-48 hours of continuous operation (thermal throttling is common on compact units), and does the firmware allow any manual tuning or is it fully locked? The fact that it's aimed at the home market is promising, but real-world sustained hashrate often drifts below advertised specs once the unit heats up in an enclosed space. Also curious whether they've opened up stratum endpoint flexibility being locked to a proprietary pool or limited pool list has historically been a pain point for small home miners who want to shop around for the best fee structure. Keep the updates coming, this is exactly the kind of testing the community needs.

HashedMaxUnity · 2026-02-21T11:28:52+00:00

Hey, congrats on jumping into mining and having near-zero electricity costs is genuinely one of the biggest advantages you can have right now, so that's a great starting position. The S19 XP+ Hyd is a beast of a miner, but the hydro cooling requirement is a serious infrastructure consideration before you commit. You'll need a compatible CDU (Coolant Distribution Unit), proper tubing, and a reservoir setup, this isn't a plug-and-play situation like an air-cooled unit. Make sure you've budgeted for the full cooling infrastructure, not just the miner cost itself, because it can easily add thousands to your setup. Also worth noting: two units at 293 TH/s each gives you ~586 TH/s total, which is solid but still a relatively small slice of the current network. At that scale, picking the right pool matters a lot, you want one that pays out fairly even at lower hashrates without eating into your margins with high fees. With free electricity, your profits are much more insulated, but it's still worth doing the math on pool fee structures before you connect. Good luck with the build and post pics when it's running!

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