Bitcoin Forum

Hello guys. Tomorrow i will buy Giant X10 but i can afford Z9 Mini too with x10.

Z9 mini has good profit for now but what about future? Should i buy it?

What is hard fork thing btw about bitcoin gold.

İ really need your thoughts thank you.

Nobody knows what a future hold mining is changing faster than cryptos ,but z9 mini is now really best buy for equihash as you say it has great profit 10k sol/300w i am going to buy it for sure :)

Basically you are taking a gamble that no coins will in the near future change their algo and render that ASIC useless.

Look at what happened with the Cryptonight ASIC that was released a few months ago. The XMR team changed the mining algo and it was useless for that coin.

I think if you got the ASIC early you might of made decent profits like $50/day but right now I think they are pulling in less than $5/day.

Hence the same future can be held for the Z9 Mini, and also think "Why are they selling this in the first place".

My advice, just buy some BTC and hold that instead. You will most likely make more money than buying the Z9.

Correct me if iam wrong but z9 can mine 20$ per day i was looking to mine zen cash and now days average is one zen per day thats good enought for me

Zen cash or Bitcoin gold?

There will be hard fork on bitcoin gold i guess. İm worried about that

We have some negative precedents with the other dedicated ASICS before like D3 ,L3 and lately the Monero ASICS which are all worthless right now.

I think it would be better to buy bitcoin or to buy a mining computer with graphic cards in order to be part of the decentralisation, ASICS means centralisation for me so I am always against them and no one gives you a guarantee that Z9 will be profitable after 1 or 2 months.

ASIC's are about an arms race where only the newest and most powerful remain relevant. In my view you should ever buy a mini anything ASIC if you expect it to be profitable. More like buy the MAXI ;)

What is average lifetime for this things i know they have 6months warranty but has anyone had any expirence with it?

Bitcoin gold already forked (yesterday?)

Only 77 Z9s have been shipped so far and I haven’t seen any report about failures. My batch 1 S9 shipped end of 2015 ( I forgot the correct date) still going strong. I had a couple l3+s out of 32 failed last year out of warranty but bitmain repaired them free of charge. So if you are lucky it will last a longtime.

How come a S9 going strong? Maybe you are talking that it is working but in case you have an energy price of 0.10 kwatt it is not profitable anymore. That happens because of the difficulty increase in bitcoin network which was 14% a few days ago.

Lasting a long time doesn't mean it will be profitable as explained above. Still though the Z9 with only 300 watt power consumption it is supposed to be profitable for at least a few months.

I really wouldn't touch any ASICs anymore. We have had just too many "scams" by Bitmain and other ASIC manufacturers, you buy an ASIC from them and you basically never ROI when getting a batch 2+

I thought the question was strictly about longevity not profitability. Since you brought up profitability, a free dollar is a free dollar, my batch 1 S9s have paid themselves off long time ago and now laying smaller $1 golden eggs a day which may as well translate into bigger eggs when BTC appreciates  ;)

Well if right now it gives you a good profitability why not buy the z9 and then holds your coins if the difficulty increases expect for the value of the coin decreases but you can still hold them and wait for the right time to sell them and make you profit.
right now there are many people and investors enter in mining business that is why the difficulty increases.

To me, I will stay building a mining rig because it supports more algo's than ASIC miners which is support less coins.
Mining rigs are flexible and you can mine any coins you want if the other coin is not profitable you can mine the other coin that gives you profit or you can mine coins and hold it for a long time and sell them in the right time to make you a huge profit.

Anyway, you can still buy it to test and learn because sometimes there are happy miners made a large profit before the price of the coins and difficulty increases.

Yeah, BM have been too clever for their own good.

Unless you get batch 1. You'll only just ROI on batch 2, then be left with a doorstopper. In some cases (see the XMR saga) you don't even get that. When you factor in the hassle and time spent playing fastest finger, shipping + fees, customs faff, warranty returns to China and then maintaining a dedicated noise-proof, power and cooling area for your asics, it's really not worth it at all.

Bitmain has been far too clever indeed if you ask me. They do it subtly and although it isn't as pronounced as the Cryptonight ASIC screw up, they are also playing tricks on Z9 purchasers. Sharing the computations one poster did on the difference in price from Batch 1 ($2000) compared to batch 3 ($850):


Good luck to all those who will continue to support Bitmain's products. You are simply selling out your values (by buying from known tricksters) for a slim chance at profits.

Bitmain and their supporters will learn a good lesson in the nearby future , don't buy any of thier products , why do they sell it in first place if they can make more money running it

The fact that people are already selling below the first batch price of $2000 for in hand Z9 Minis in the Computer Hardware section shows a lot about this miner already- probably not the best idea to get one. It's beyond a gamble right now with Bitmain ASICs- you're just throwing your money away by buying them, especially when there's plenty of negative feedback from miners like the B3, A3, D3; basically every alt miner Bitmain has ever released recently besides the L3+. I don't see why people think 'this time'll be different' on every single new release from Bitmain.

I am making 1.5 ZEN per day with my Z9.
It's very good profit so far

I'ts a solid product so far. I got what I paid for. But I would not be so quick to buy a batch two one... especially in this down markey

Yeah so far running rock solid at 750mhz @ 15 KH/s. On the fence about ordering more though.

They've shipped ~ 10,000 units so far - that's 150 MH/s. Total hashrate on the ZCash network is about 650 MH/s. Theoretically speaking, if they manage 10k units per month then in 5 months they double the total hashrate hence halving profits. That's not considering the other coins out there like ZenCash and ZClassic - both of which have much much lower net hashrates as of now (60 MH/s and 25 MH/s).

Not bad for an $850 z9 delivered end August. Specially since I have a $250 discount coupon and dont need PSU's - bringing cost down to about $700 per unit with shipping and customs.

I'm not taking into account the fact that Innosilicon has a 50 KH/s miner that's shipping soon. Much more expensive though. $10,000 for two (under their buy 1 get 1 free scheme).

Anyone able to analyze this better so a calculated buying decision can be taken?

I think you nailed it.  Not bad for a Newb.  :)

The only thing missing is how many of those $850 Z9s do they sell by the end of August.  How big is the second batch.  Another 10K, 20K, 40K, 100K?  That's the part of the equation  that this Newbie is struggling with.

You're a storyteller. My Z9 mini now earns 22 + dollars a day. It's no longer 2 week. If you don't understand, don't write nonsense!

I know its been a very long time since anyone has posted in this thread, but I think it is still very relevant. I am an ASIC n00b. This will be the first ASIC I have ever bought. What has surprised me so far is how little profitability has changed since these were announced. I'm assuming batch 1 was very small. Something tells me batch 2 won't be, and profitability will have a drastic decrease. Still, I see a few assumptions on here that I don't think are true.

1) People assume Bitmain won't ship out miners if they could make more mining.

This may be true, but you have to consider the amount of profit they can make producing these things. Considering the numbers they can release, I can't imagine they would make more mining with these than they can make by selling these, when they can produce them so fast. They may mine to test them and keep changes in difficulty more stable I suppose, but to think they would make more mining than they make pumping out mass-produced hardware with high profit margins seems highly unlikely to me.

2) People assume the difficulty spike will be proportional to the number of new ASIC miners.

In theory this sounds good, but do you really think GPU miners will stick around if they are losing money? For example, if ASIC miners came in and increased network hash rates by 200%, don't you think that the GPU miners would leave equihash, effectively reducing our predictions of difficulty increases?

Obviously, difficulty is going to go through the roof. But by how much depends on how many units will be shipped. I realize that I am taking a big gamble on getting batch 2, but I think it is a fair trade in risk/reward considering how difficulty has so far remained relatively stable. If it's a doorstop, it will be an expensive lesson learned. Still, I wonder if anyone has any reliable methods at determining how big these batches are. Does anyone have any estimates based on anything besides speculation?

Where did you get a Z9 mini before launch?

If we wouldn't see bitcoin growing in 3 times in the near future, then, in my withers, it makes no sense to buy mining equipment in general, otherwise the payback will be a long time.

So far I have mined 5.3 ZEC, so I hope I will break even or be close to it before the second batch ships. I bought two more Minis with the coupons and am hopeful, that I will break even soon enough. But if I didn't have the coupons (and free electricity) I would probably not buy the miners right now. I expect the difficulty to at least triple, so 3 Minis will earn as much as 1 Mini right now in a few months.

According Bitmain tweeter they sold approx. 7K mini's. Including other companies, total hash from ASIC may play along 200,000,000sol/s.

So if you have one mini at 10ksol/s and mining Komodo (if ever you want long term income since they will not fork) with currently 3KMD reward per block at 1.32USD each, a profit per day would be

10ksol/s                          1.32USD      1440 blocks
-------------- x 3KMD x ------------ x ------------ = $0.285/day
200,000ksol/s                    KMD           day

This is only my prediction after equihash forks. But still equihash asic for z9 mini is still profitable today (apprx $15/day)

is it safe buy by from bitmain.com?

Great point. One that didn't cross my mind. Plus the fact that the crypto market may rebound, increasing profitability, may just justify getting a mini for $850 at this point in time...

I believe this will be profitable for few months yet, cause of low power cost

bought from z9 mini asian-miner.com.
20/08/2018 paid btc
still under processing
they do not respond to email.
I do not recommend buying asian-miner.com