Antminer L3+ OVERCLOCKED !!! HOT !!! full review with LOTs of pics

[Mpanda]

Nice... I wonder what is considered as hot or overheating for these miners. 80 degrees? I am currently running L3+ miner on 469m freq with 613.029 MH/S and the temp for chips are between 60-62 with 42% fan speed percentage.  Is that ok? I live in Australia, in an air-cooled apartment and it's pretty hot here... 

[Albortz]

Nice... I wonder what is considered as hot or overheating for these miners. 80 degrees? I am currently running L3+ miner on 469m freq with 613.029 MH/S and the temp for chips are between 60-62 with 42% fan speed percentage.  Is that ok? I live in Australia, in an air-cooled apartment and it's pretty hot here... 

That is actually pretty low for the hashing power you got. I run mine on 580Mhs since a couple of weeks and got the same temp but mine are in a data center with 18°C cold air

[Albortz]

Hi, i overclocked 2 miners: 1: 444M, 2: 450M
How can i see what ist the speed in % of the fans?

They are cold. Are they in a cooled space? how do you cool them?


And go to miner settings under advanced I think. There is the fan speed control. You cant however see what % you got right now on the miner overview page.

you can set the speed in % though

[rampantparanoia]

curious -  whats the lifespan of the L3+ after overclocking? I'm sure some of the orders that were placed in april 2017 have been OC-ed... does anyone have one of those? are they still running?

[rockmoney]

I have had my L3+ for several months now, all running at 419 MH/z frequency, hashing at ~550 MH/s. I have three 240V receptacles installed specifically for my miners. I use a 240V PDU (power distribution unit) made by TrippLite, each gives me 8 C13 and 2 C19 outlets which are capable of distributing a total of 20 Amps (de-rated to ~18 Amps) each. I always keep spare/backup parts on hand, including several HP Platinum 1200W and 1500W PSU's which I have accumulated over time. In addition to my backups, I discovered 2 HP 1500W Platinum PSU's in a box a few days ago and decided to use them on 2 Antminer L3+ miners (which were using HP 1200W Platinum PSU's). I have observed them for ~72 hours now, and the results have been phenomenal!

The L3+'s that are using the 1500W PSU's have been running a few about 2 degrees cooler than the others (which are right next to one another), have seen very little (HW) hardware errors (very minimal comparatively), and so I've decided to overclock them a bit more, and came across this thread while doing some research to see what frequencies others have been successfully using.

I have decided on starting with 475MH/z and will closely observe for a day or two. I will also report back with the results afterwards. In regards to anyone wondering what the best PSU might be for an L3+, I would most definitely spend an extra few dollars to purchase an HP 1500W Common Slot Platinum PSU as opposed to the 1200W ones in the same HP line! Keep in mind that the 1500W PSU's can ONLY run on 240V lines, and you will also need a quality breakout board that can safely handle the power (according to the meters on my PDU's, the L3+ miners are drawing ~3.5 Amps each).

[rjenkin]

I run my own L3+ using APW3++ (1600W) on 220v supply. With these I find the best results with the following settings:
475M 100% manual fan speed - 620Mhash
462M 100% manual fan speed - 600Mhash

Some miners get higher hardware errors above an acceptable level at 475M so they are set at 462M. We are able to run all miners at these two settings and have consistently low hardware errors (max 0.2% and usually less than 0.1%). We have not had hardware failures over many months on these settings.

[Albortz]

I run my own L3+ using APW3++ (1600W) on 220v supply. With these I find the best results with the following settings:
475M 100% manual fan speed - 620Mhash
462M 100% manual fan speed - 600Mhash

Some miners get higher hardware errors above an acceptable level at 475M so they are set at 462M. We are able to run all miners at these two settings and have consistently low hardware errors (max 0.2% and usually less than 0.1%). We have not had hardware failures over many months on these settings.

What temperatures do your chips have and how do you cool them?  Mine are in a data center with 18°C cold air but my chips run as hot as 65-70°C with only 450M and 580MH

[GunsN]

I run my own L3+ using APW3++ (1600W) on 220v supply. With these I find the best results with the following settings:
475M 100% manual fan speed - 620Mhash
462M 100% manual fan speed - 600Mhash

Some miners get higher hardware errors above an acceptable level at 475M so they are set at 462M. We are able to run all miners at these two settings and have consistently low hardware errors (max 0.2% and usually less than 0.1%). We have not had hardware failures over many months on these settings.

What temperatures do your chips have and how do you cool them?  Mine are in a data center with 18°C cold air but my chips run as hot as 65-70°C with only 450M and 580MH

I have overclocked to 450M and chip temps are  60-65.

[Raziel87]

I have been running my puppy on 438 MHz for 2 months now at 570 Mhs. inlet temp is 25 C and hottest chip is 63 C. Fan 1 @ 3,594 RPM / Fan 2 @ 2,076 RPM
I think it's a sweet spot for me. I measured the power draw but I forgot. It was a tad higher than stock.
More hash gain then power draw. If any1 wants I could pull the plug and place my meter.

[dsmn]

Been running for like half a year or so like this.


I would NOT recommend overclocking any other Bitmain product like this, only L3 can do this primary because its not as much a prosessor heavy algo but more memory hard.

[dmitriy vakulenko]

Hi miners!

This week some nice Scrypt mining ASIC machine landed on my doorstep! Antminer L3+ it is.
I wont repeat manufacturers full spec sheet, but just the key one:

Hash Rate: 504MH/s
Power Consumption: 800W

https://tweezers.tech/antminer_l3+/AntMinerL3Plus_1.jpg
https://tweezers.tech/antminer_l3+/AntMinerL3Plus_2.jpg


I won’t give you any advice about where and how to buy one of these, but I’m very eager to share my experience on how this machine performs.

My setup:

https://tweezers.tech/antminer_l3+/AntMinerL3Plus_10.jpg

Mining pool - AntPool.com SCRYPT
PSU: 1500 W Corsair AX1500i (overkill, but has nice performance reporting tool


Ambient temps in the room were 22C / 72F with ventilation to supply fresh air.

What i wanted to test:
inspect machine build quality;
test power consumption;
test overclocking potential;
find our best settings for long term mining.

Build Quality


I think it is a decent quality machine and keeping in mind this is not a show room item some minor quirks are to be ignored.

Let the pictures tell the story:

https://tweezers.tech/antminer_l3+/AntMinerL3Plus_3.jpg
https://tweezers.tech/antminer_l3+/AntMinerL3Plus_4.jpg
https://tweezers.tech/antminer_l3+/AntMinerL3Plus_5.jpg
https://tweezers.tech/antminer_l3+/AntMinerL3Plus_6.jpg
https://tweezers.tech/antminer_l3+/AntMinerL3Plus_7.jpg
https://tweezers.tech/antminer_l3+/AntMinerL3Plus_8.jpg
https://tweezers.tech/antminer_l3+/AntMinerL3Plus_9.jpg


Sound  

https://tweezers.tech/antminer_l3+/AntMinerL3Plus_11.jpg

OMG! This unit is definitely not for residential facilities … the sound of fans on 100% will drive you nuts it’s over 80 db and is comparable to: average factory, freight train (at 15 meters); propeller plane flyover at 1000 ft (88 dB); diesel truck 40 mph at 50 ft (84 dB); diesel train at 45 mph at 100 ft (83 dB). Food blender (88 dB); milling machine (85 dB); garbage disposal (80 dB).

Even at 50% it is very loud. It has resonating sound that is very hard to bear for longer duration. It belongs to miner farms, so apartment miners keep that in mind

Placed on hard surface machine had some vibration because no rubber cushions are installed and it’s just bare aluminium at contact.

Power consumption and Overclocking potential

This is not a scientific review by any means, but you can get the point of what this machine is capable of.

Stock settings

Machine runs as advertised ~500 MH/s mining SCRYPT coins. ASIC Chips runs at 384MHz and from PSU pulls very reasonable ~730 W. Corsair PSU over Link app is reporting Power in (from the socket): 779W and Power out (to the miner): 736W with calculated efficiency 94%
All 8 PCIe power lines draw 9 -11 Amps.

https://tweezers.tech/antminer_l3+/power_stock.png
https://tweezers.tech/antminer_l3+/asic_stock.png

Why different Amps? because of ASIC chip quality. Some chips have less leak and perform better other draw more Amps.

Overclocking Antminer L3+ to 605 MH/s @ 462 Mhz @ 888 WATTs

It’s time to void that warranty ups I already void it by removing casing screws :/

Anyway I have performed some benchmarking with different chip frequency settings and observed power consumption, hash rates and temps.

Below is the table of different settings and results.

My goal was to achieve +20% hashing rate increase and I did that easily. 600+ MH/s was achieved increasing frequency to 462 Mhz (~+20% from stock settings) and machine pulled 888 WATTS from PSU (~+20% more power draw compared to stock speeds).

https://tweezers.tech/antminer_l3+/power_overclocked.png
https://tweezers.tech/antminer_l3+/asic_overclocked.png

I have seen miners getting 600 MH/s @ 444Mhz, but pulling over 1kW from the socket. This is ASIC chip lottery and those results depend on ASIC quality.

I have contacted Antminer producer to get any advice on long term recommended settings or how far I can go the answer was very conservative - they don’t recommend overclocking, but suggested to observe chip temps. So keep them cool and your Anty L3+ shall be ok.

Anyway I’m very happy with results and all coins this machine will mine I will directed to the upcoming real business healthcare appointment booking ICO @ https://tweezers.tech this is very exciting ICO that !DISCLAIMER! I’m involved in. if you like this test i performed please visit our ICO site and maybe you will find it interesting and become part of our investor or team crowd!

Check out this table bellow. It shows very clearly that these bad boys ASIC chips scale very nice across all settings:

ASIC, Mhz	Power, W	Hash rate, MH/s
384 Mhz	740 W	502 MH/s
400 Mhz	760 W	523 MH/s
425 Mhz	n.a.	555 MH/s
444 Mhz	850 W	580 MH/s
450 Mhz	860 W	590 MH/s
462 Mhz	888 W	605 MH/s

very useful article, thanks for spelling. can you tell me about the results after a month of work? What is the temperature of the chips?

[cod3gen]

I have 4 L3+`s and i have been mixing the hashboard between them to end up with 2 that have been running stable at 500 Mhz for 4 months now, 1 that is set to 487 Mhz stable for same period and the last one at 481 Mhz stable for same period. There is no problem overclocking these units quite much. Those at 500 Mhz is using about 970w at wall with 94% eff. psu. Temps are about 55c to 68c, with fans @ 80%.

[solarismedic]

Been running for like half a year or so like this.
https://preview.ibb.co/fQnHxc/l3plus.png

I would NOT recommend overclocking any other Bitmain product like this, only L3 can do this primary because its not as much a prosessor heavy algo but more memory hard.

That's a cool admin/management tool you have there.  What system that?

[wolverine5pl]

With blissh mode 504mh at 700w.
You guys talk about overclocking. Temps etc what about HW errors tho? What's acceptable level per day per board?

[Sackl]

Be aware there a two different Hashboards actually.

https://support.bitmain.com/hc/en-us/articles/360002072833-L3-Different-Version-Comparison

Hashboard L3+ (S) is the old PCB and could handle Overclocking up to 600 MHs
Hashboard L3+ (N) is the new PCB and is very poor in Terms of Overclocking (around 540 Mhs only)

So be aware when overclocking newer L3+ they have changed the Boards somewhere in early 2018.

[jstefanop]

Be aware there a two different Hashboards actually.

https://support.bitmain.com/hc/en-us/articles/360002072833-L3-Different-Version-Comparison

Hashboard L3+ (S) is the old PCB and could handle Overclocking up to 600 MHs
Hashboard L3+ (N) is the new PCB and could and is very poor in Terms of Overclocking (around 540 Mhs only)

So be aware when overclocking newer L3+ they have changed the Boards somewhere in early 2018.

Wow, bastards took out nice polymer caps for aluminum ones. That is saving them like 25 bucks per board.

[saffacoin]

Be aware there a two different Hashboards actually.

https://support.bitmain.com/hc/en-us/articles/360002072833-L3-Different-Version-Comparison

Hashboard L3+ (S) is the old PCB and could handle Overclocking up to 600 MHs
Hashboard L3+ (N) is the new PCB and is very poor in Terms of Overclocking (around 540 Mhs only)

So be aware when overclocking newer L3+ they have changed the Boards somewhere in early 2018.

Hi Sakl,
I do have L3+ miners delivered in Feb 18 and was about to play with one when I stumbled on this post.

Miners are in a hosting centre so will have to wait for me to check which version hasboards they have but has anyone tried to overclock the Hashboard L3+ (N) and if so what speeds was achieved?

[Sackl]

Be aware there a two different Hashboards actually.

https://support.bitmain.com/hc/en-us/articles/360002072833-L3-Different-Version-Comparison

Hashboard L3+ (S) is the old PCB and could handle Overclocking up to 600 MHs
Hashboard L3+ (N) is the new PCB and is very poor in Terms of Overclocking (around 540 Mhs only)

So be aware when overclocking newer L3+ they have changed the Boards somewhere in early 2018.

Hi Sakl,
I do have L3+ miners delivered in Feb 18 and was about to play with one when I stumbled on this post.

Miners are in a hosting centre so will have to wait for me to check which version hasboards they have but has anyone tried to overclock the Hashboard L3+ (N) and if so what speeds was achieved?

Hi there if you are using the new PCB i wont use more than 412M.
Thats around 540 MHash.

[Chiko.Chavez]

Be aware there a two different Hashboards actually.

https://support.bitmain.com/hc/en-us/articles/360002072833-L3-Different-Version-Comparison

Hashboard L3+ (S) is the old PCB and could handle Overclocking up to 600 MHs
Hashboard L3+ (N) is the new PCB and is very poor in Terms of Overclocking (around 540 Mhs only)

So be aware when overclocking newer L3+ they have changed the Boards somewhere in early 2018.

Hi Sakl,
I do have L3+ miners delivered in Feb 18 and was about to play with one when I stumbled on this post.

Miners are in a hosting centre so will have to wait for me to check which version hasboards they have but has anyone tried to overclock the Hashboard L3+ (N) and if so what speeds was achieved?

Hi there if you are using the new PCB i wont use more than 412M.
Thats around 540 MHash.

Thank you for the info about the board types, I have the newer (worse) type in my L3+.

Would this mean that using the OC of 412M is "pushing" the OC to the limit for this board type and therefore may/will compromise the chips etc in the long term?

Anyone have experience OCing the newer board type and had it running for the past few months?

[Sackl]

Good Morning,

actually my new L3+ (with N-Boards) are running with 425 MHz (that´s around 555 MHs).
They are doing well and HW-Error rate is very low.

I heard from other Miners that they can handle 450 MHz also.
But in my humble Opinion it´s a Lottery with the new Boards.

Anyone here with December and January Batch ?

It would be interesting to know when Bitmain changed the Boards.