Topic: L3+ Way Overclocked! 500M frequency - 650 MH/s! - page 2. (Read 3017 times)

upto you, but its a 50/50 game

What sort of returns do you get? Are you mining other crypto's or directly on NH?

Looking into buying a L3+ and would like to know if it is worth it? Compared to normal GPU mining. Some people say it's too late to jump in, but if the ROI is better than normal GPU mining, why not?

There is a reason the frequency is set as it is.

My L3+ is working very well, and has been very consistent. I am pleased with its 502 MH/s hashpower.

This is poor math. It MAY end up being true for the L3+ since it seems to be holding its payout value fairly well, but with the D3 for example, if you both got first batch models and one of you overclocked to earn 30% more per day, the overclock dying 85 days earlier would likely have earned MUCH more.

Again, not saying you should or shouldn't overclock, whatever works for you works for you, just saying that math isn't necessarily correct.

Where did you get information about a potential L4+ unit?

My L3+`s is doing a stable 630 Mhs @ 960w

Definitely wont be that much. Die shrink to 16nm which I'm sure bitmain is working on will be either 500MH @ 400 watts, or 1GH at the same wattage now.

Who told you L4+ is coming and at 1.8 Ghs 900 watt?

I have since went down to ~600 MH/s. My average speed is actually pretty close to what I was achieving with the higher settings. I have my GPU Rigs and L3+s out in my garage and with temps around 30-50 F (0-15 C) cooling is no longer a concern. It’s making about $1 (+/- 0.15) per hour on NiceHash at mining time. Thinking about bringing my GPU Rigs in to help supplement heat,

With the continued production or at least shipments of more L3+ batches and how each has had a great negative effect on profit I really don’t have much faith in these in 6 months (less really) so I think the extra strain and demand I’m putting on these is worth the risk to their long term functionality. I haven’t actually done the spreadsheet but I’m pretty sure I’ve made my $1,500 USD back on these especially since I’ve held everything I’ve earned and the value of BTC (and LTC, everything) has increased.

I’ll have to be on the lookout for the release of the L4+ with its 1.8 GH/s at 900 W and make sure to get in on the first batch.

Dosent matter what temps your chips are...these boards are a serial powered chain controlled by a single buck. The mosfets are pretty nice for these, but at the power draw your approaching you will most certainly blow one of them eventually. Not to mention serial power designs definitely don't like to be run past amps they are not designed for.

Sure youll get an extra 100MH for a month or two, but whats better 500MH for a year straight, or blown boards after 6 months of running at 650MH outside of warranty and shit out of luck?

Slow and steady wins the race, even in crypto.

Typical Bitmain response. I wouldn't expect much help from them.
Following this thread. I think 650 may be a bit agressive... remember the key is to mine 24/7 / 365... if you can get 365.
If i mine at stock settings for 365 days, and you mine at 650 for only 280 days, then I MAKE MORE (standard model).

GL, keep us updated

 
 Here is the email I sent to Bitmain

Nov 9, 02:14 CST

Very High HW Count...
Good afternoon, I have had my L3+ for about a month and a half now and everything seems to be running fine but my HW counts is starting to get hundreds per hour and thousands per day on all 4 of my boards. It does not appear to be effecting the reported hashrate on the Antminer GUI. The Chip Temps are all below 60 and the PCB temps are all below 50. What exactly is HW? Could the number that I am having which is much higher than anyone I have talked to you that owns a L3+ a potential short or long term issues as long as the temps are fine? Does HW effect the effective hashrate when mining? Could you please let me know what these HW are and what if any effect that have on my actual hashrate and if they could damage my L3+?

Thanks in advance
Mark


——


Here is the response I got from Bitmain about all this....

Dear Mark,

If your miner is hashing to spec then the hardware errors are no concern at all. The HW errors can be higher on one machine than another - that is not an issue.

Please let us know if you have further questions.

Best regards,
Barbara
Bitmain

What exactly is HW? Nicehash seems to be paying more at 650MH than at 650MH. I get 100% accepted shares. Where is the 6.2% coming from?

Thanks for your input, much appreciated.

Don't do this.
You can clearly see that HW error is way too high. 6.2% !!
HW error is acceptable up to 0.5%, above that your effective hashrate decreases significantly and you kill you hw.
I have much experience in this matter I've been running and repairing ASIC miners since 2013.
Also keep in mind that VRM's are not designed to handle 30% more power even if the ASIC could handle 30% higher frequency.

My performance tests showed that almost all L3+ starts having too much HW errors above 462MHz. So 600MH/s is the top.

I'm reading this for the first time. Can anyone share some links on overclocking the L3+. I obviously googled but didn't find something straight forward.

How Bitmain find, that L3 was overclocked sometime in the past?

I am bit confused here. First you said you OC'd to 700 MH/s and that the L3+ was really sensitive and burned up rather fast.
Could you please refer me to your post and answer these questions if they aren't addressed in your post?
How and why? Its temps are at par with other L3+ stock settings? Can you please be specific for me please. I thought HW were okay so long as effective hashrate was stable.

Then you state you have 3 more or a total of 3 L3+ with one going out at 462 and the other at 700?

My ambient temp during the day is also 50-60F during the day and 30-45 at night in my garage with good air flow. I also run my Etherem mining rigs in their and they remain cool.

So are you down to 1 L3+? Or all of them with 1 of the 4 boards not working?

---

I just turned the fan up to 100%, which I am not going to keep it at that and here is it readings...

Elapsed   MH/S(RT)   MH/S(avg)
7m32s
650.845
609.57
Chain#   ASIC#   Frequency   MH/S(RT)   HW   Temp(PCB)   Temp(Chip)   ASIC status
1
72
500
163.42
268
I:0 O:32
I:0 O:39
oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo
2
72
500
162.76
167
I:0 O:31
I:0 O:38
oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo
3
72
500
162.02
412
I:0 O:30
I:0 O:37
oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo
4
72
500
162.65
207
I:0 O:30
I:0 O:38
oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo oooooooo
Fan#   Fan1   Fan2
Speed (r/min)   6,210   6,240

---

So the TEMP PCB is 1-4; 32 31 30 300
And the TEMP (Chip) is 1-4; 39 39 38 38

----

Fans at 100% are 6,210 and 6,240
When I didnt have a %fan checked the fans were at 3,120 and 3,180
So I think I am going to try setting the fans at 60% or so assuming 6240 is 100% and that keeps Chip Temp at 40 and 3180 had them at 59-54-54-52.

Ill post an update in a day or two.

Thanks all!

-----------

HERE IS THE PHOTO / SCREENSHOT OF MY L3+ RUNNING AT 500M FREQ AT 650 MH/S FOR 25.5 HOURS
https://ibb.co/hQ6V0w

----------

AGAIN HERE IS A LINK FROM BITMAIN ABOUT TEMPS AND OTHER INFO FOR THE L3+
https://enforum.bitmain.com/bbs/topics/4959

The temperature shutdown thing doesn't work and hasn't ever worked on any Antminer unit, at least for me. Don't rely on it, I've seen miners go above my set temp by 5-10 and nothing happened. Under 80-70 is a good temp to have your miners at.

I got 3 L3+'s that had a board go on them at 462mhz. This is in an environment that that ambient temperature is generally  45-60F aka Nice and cold. Soon the environment will be freezing or colder.

How and why? Its temps are at par with other L3+ stock settings? Can you please be specific for me please. I thought HW were okay so long as effective hashrate was stable.

Thanks in advance.

So info I found from Bitmain...
Bold text in my response here forward
https://enforum.bitmain.com/bbs/topics/4959

-

Temps of the L3+ is different from previous miners, since there are four kinds of temps. What does each of them stand for?
Answer:

Temp(PCB): is the board, “I” is the board intake temp, “O” is the chip outlet temp.

Temp (Chip): is the chips, “I” is the chip temp on the board's intake side, “O” is the chip temp on the board's outlet side.

-

What’s the range of these temps of the miner?
Answer: We suggest the temp range of miner should keep within 25-80, and usually, it will be 40-70.

I seem to be safely in this range!

-

The temp of the miner only shows two, is it normal?
Answer: Yes, it is normal. In order to check the temp more convenient, the temp of hash board will be cancelled, only the temp of chips will be shown in latter miners. The board will only show the temperature of “O”, and the temperature of “I” will all be 0, which is normal.

-

Which temp of the miner should I focus on?
Answer: Temp (Chip) is most important, because it is air outlet temp of the miner. It will lead to high temperature protection, if this temp over 80.

Well below 80 so it says I am 'high temp protected"
Furthermore in the 'Miner Configuration' -> 'General Settings' -> 'Miner General Configuration' -> Setup
Stop running when temprerature is over 80℃ - I have this box checked!
Customize the fan speed percentage - I dont have this set but I could experiment and set it to 75-100% to see if I can reduce temps more. Thoughts?

It seems if I can keep the Chips Temp lower than 80 - at 59 now - but lets say below 60 or even 55 then all should be fine right?
The only thing that concerns me is the effect of the HW errors. I know with GPU mining (I know this is an ASIC not a GPU) these are not an issue until they effect hashrate and from what I can tell they are not. Is there way besides the lack of rejected shares I could tell if this effecting my hashrate and or earnings?

I came here seeking any and all advice.
Thank you for your input.

No not really. There was a blog post and a forum post about this months ago I got mine up to 700mh/s to see if I could do itI didn't make a post. It was proven the L3+ are really sensitive to OC and burn up rather fast above stock. Hell even at stock they are likely to go bad.