(Review/Guide) BW.com BW-L21, 550 Mh/s, 950W Litecoin (scrypt) ASIC miner

[Scourge_of_death]

Hi guys, I am joining the post a bit later than intended, but I was wondering if you had any view on the BW-L21 vs. the L3+?

Having read a lot of reviews from (individual) customers, it seems that Bitmain doesn't really spend time with orders for individuals, and only provides proper support for large orders. Is that conclusion correct?

I have come across largely positive reviews for the BW L21s though, so until I saw this thread, I was considering buying from them, because I can justify higher cost if their service and shipping is reliable. Any thoughts would be much appreciated! I am considering spending my savings on this (2k USD is not insignificant).

Thanks!

[Bitbobb]

Hi guys, I am joining the post a bit later than intended, but I was wondering if you had any view on the BW-L21 vs. the L3+?

Having read a lot of reviews from (individual) customers, it seems that Bitmain doesn't really spend time with orders for individuals, and only provides proper support for large orders. Is that conclusion correct?

I have come across largely positive reviews for the BW L21s though, so until I saw this thread, I was considering buying from them, because I can justify higher cost if their service and shipping is reliable. Any thoughts would be much appreciated! I am considering spending my savings on this (2k USD is not insignificant).

Thanks!

I had flawless transactions with bitmain but I did not require any customer service.  I just made my order then paid then waited and the stuff arrived 1 month earlier than stated without and communications needed.  I have not purchased any machines from the other company yet.

[omgcoins]

I ran the L21 for a week now, so far so good. Hash rate seems to be stable at 480-500 M/s (not 550 as advertised) i'm no sure if the pool affects the hash rate or not ( i'm using litecoin.org ).
It is running very loud which is not considering to let it sit in your house. The miner is running cool ( i guess the high speed fan make it running cool ).
Some people say it's way overpriced but L3+ is $2000 right now at bitmain.com, i'm not sure if this is still true  . Shipment speed and customer service at Hyperbit are ways better than Bitmain too.

I'm trying to mine with other pools to see if the hash rate increase, if so may be i would get few more.

[HagssFIN]

What is your hash board frequency setting?

At 684 Mhz it should have about 580 Mh/s hash rate.

[omgcoins]

What is your hash board frequency setting?

At 684 Mhz it should have about 580 Mh/s hash rate.

It's set at 684 when i received it and i leave it as is, it weird. Is the pool affecting the hashrate or not?

[omgcoins]

My bad, i checked it from https://www.litecoinpool.org it says lower number than from bw , i'm getting 580 Mh/S on BW.

[HagssFIN]

My bad, i checked it from https://www.litecoinpool.org it says lower number than from bw , i'm getting 580 Mh/S on BW.

Ok, great! 

[notey]

I ran the L21 for a week now, so far so good. Hash rate seems to be stable at 480-500 M/s (not 550 as advertised) i'm no sure if the pool affects the hash rate or not ( i'm using litecoin.org ).
It is running very loud which is not considering to let it sit in your house. The miner is running cool ( i guess the high speed fan make it running cool ).
Some people say it's way overpriced but L3+ is $2000 right now at bitmain.com, i'm not sure if this is still true   . Shipment speed and customer service at Hyperbit are ways better than Bitmain too.

I'm trying to mine with other pools to see if the hash rate increase, if so may be i would get few more.

We ordered almost $40K in miners from Hyperbit.  They were a month late, promised free shipping (which they never did) and promised to compensate us for the lost time (they never did).  As a result, we ordered 20 L3+ units, paid with BCH, confirmed in a few minutes and shipped early.  Over the last few months, Bitmain has significantly improved their customer service.  I usually get responses to technical questions within 48 hours.  Not so w/Hyperbit (at least for us in general). We show 585 MHs on miner interfaces, but pool data shows low to mid 500s.  VERY loud.  If you have them at home, go with the L3+

[bayasaaa]

What is your hash board frequency setting?

At 684 Mhz it should have about 580 Mh/s hash rate.

 hello , this l21 miner only mining lite coin or ,  mining orther  scrypt  coin  mining,

you have try any coin  scrypt ?

[HagssFIN]

BW-L21 is capable of mining any scrypt algorithm based cryptocurrency.

Litecoin is one of those.

I have tried this miner successfully ok in a multipool (Nicehash.com and Prohashing.com).

[bayasaaa]

   you have minnig any coin tsesting ?

 i ask  bw.com ,    he say not mining orther coin , only lite ?

 

[HagssFIN]

BW-L21 is capable of mining any scrypt algorithm based cryptocurrency.

Litecoin is one of those.

I have tried this miner successfully ok in a multipool (Nicehash.com and Prohashing.com).

No offence, but did you actually read my answer?

I'm not going to be all like a parrot here.

[bayasaaa]

 
   tnx .     im checking,  if only lite  bad !

[omgcoins]

BW-L21 is capable of mining any scrypt algorithm based cryptocurrency.

Litecoin is one of those.

I have tried this miner successfully ok in a multipool (Nicehash.com and Prohashing.com).

May i ask what coins do you mine? I'm currently pull out only about $15/ day on BW.com pool too bad.

[floala]

I have 91 such miners and im getting day by day more and more disappointed for weeks now.
Lot of details missing, miner freezes, no chance to know which one from looking at the lights, only one firmware update so far, expected for weeks another one but nothing yet.
Lot of restart needed and most of miners need a manual restart (power off / on) to get back. if you are lucky miner runs again for another few hours until it freezes again. In most cases another forced reboot is needed.
Hashrate acceptance is very bad on almost all pools. Even on BW it self.

I hope my post wakes up some of those from BW and HB representatives.

I have sent few times printscreens, videos etc but the reply is: BW team isnt getting the firmware out.

This brings lot of questions for hyperbit, but i will wait few more days, even it is causing is so much damages.

[HagssFIN]

@floala
Here are latest instructions that I got a while ago from Hyperbit to upgrade the firmware to a new firmware including a English GUI.
PDF document at my Mega.nz cloud: https://mega.nz/#!VxVUGKgI!7NTQlT6FJuwoo3rkacMDM9ByyUh7mpkOfJq0Bw3OPLQ

It is an easy process when you follow the instructions very carefully.

Would this provide any help to your issue?

[omgcoins]

Same thing here, after receiving December batch and run for 2 weeks. The unit starting to have problem, it's not hashing (4 led on the back  is off) , i have to turn off then turn on then hit reset button for it to hash again.
I contact hyper bit and they said that BW will release new firmware in 4-5 weeks. Hopefully, they will get rid of this problem soon.

[apax]

I have 20 of them stuck in customs asking me for the European  Certificates of Conformity. "LVD 2014-35-UE" and "ROHS 2011-65-EC"

Does any one has that or how did you manage to go through customs?

[omgcoins]

I have 20 of them stuck in customs asking me for the European  Certificates of Conformity. "LVD 2014-35-UE" and "ROHS 2011-65-EC"

Does any one has that or how did you manage to go through customs?

Ask hyperbit, they provide it i guess.

[notey]

I have 91 such miners and im getting day by day more and more disappointed for weeks now.
Lot of details missing, miner freezes, no chance to know which one from looking at the lights, only one firmware update so far, expected for weeks another one but nothing yet.
Lot of restart needed and most of miners need a manual restart (power off / on) to get back. if you are lucky miner runs again for another few hours until it freezes again. In most cases another forced reboot is needed.
Hashrate acceptance is very bad on almost all pools. Even on BW it self.

I hope my post wakes up some of those from BW and HB representatives.

I have sent few times printscreens, videos etc but the reply is: BW team isnt getting the firmware out.

This brings lot of questions for hyperbit, but i will wait few more days, even it is causing is so much damages.

Unfortunately, we all seem to be in the same situation.  I'm having lots of problems with my miners.  The L3+ is MUCH more stable and productive IMHO.  I might add that the BW.com website has now listed the L21s for sale.  I am not sure what the status is of the former distributor, but they are not answering our messages any longer.

When I unpacked my miners, I could see that they had been running for 187 days previous to arrival at my house.  See picture.
https://imgur.com/a/vre7B