I was under the impression it was as well, however I cannot find any info on the Bitmain website which lends any fact to that impression. The blog/PR post from BM about miners featuring the new 7nm chipset only mentions the S15 and the T15. The efficiencies of the S15 and T15 are a significant jump from the S11. The S11 has 252 chips on 3 boards while the S15 and T15 have 288 on 4 boards and 180 on 3, respectively.

The above factors lead me to believe that the S11 is in fact using 16nm chips and was probably their "improved" S9 they intended to release had they not been experiencing such financial difficulty.

Edit: Link to blog post mentioned above:

https://blog.bitmain.com/en/the-7nm-antminer-s15-and-t15-are-now-available-for-purchase/

If your voltage is too high I don’t think running at LPM would have made a difference, especially if these PSU’s are as sensitive as they are appearing to be. What’s strange is the previous APWs were advertised as having “overvoltage protection.” Where was that for your units? Really hope Bitmain didn’t scrimp on these PSU’s.

Link to info below in case you’re interested in removing your APW8 and giving it an inspection:

https://support.bitmain.com/hc/en-us/articles/360013898033-How-to-detach-APW8-PSU-from-DR5-S11-S15-T15

Multimeter tells me my PDU is distributing 200v regardless of load, my panel is labeled 208v however. I haven’t had power problems (no dead psu’s) in the year I’ve had this panel under 24/7 load. Temps ranged from 65 to 95 over that time as ventilation and A/C changed.

I’ve only run my T15 in LPM for 3-4 hours since I received it on Tuesday and I’ve had no PSU problems. So, based on available info, we can preliminarily say that the APW8 tolerates the low end of its rating better than the high end. It will be interesting to see this range better defined as more units enter the field.

So my stats are 23.35 TH/s at 200v, 7.6 Amps

Do the fans on the PSU spin when you try to re-power it up? More wondering if it is giving any indications that it is responding to input power.

The PSU on my T15 is not hot to the touch in normal mode in a ~75ºF room. I will check and confirm come Monday that this is still the case.

They are out, check out the hardware sub of this forum. I have a T15 personally.

Now, I don’t know how this guy got his hands on a claimed 250 of them however.

I’m running my T15 at 200v since Tuesday without issue. How long have you waited between trying to get it running again? The APW5’s I have, when they trip into protection mode, can take 15 minutes of being unplugged before they’ll respond to power input again. I wonder, what are the stats on the APW8?

I replied to the thread you have screenshot before it was deleted. I ran the linked “firmware” through VirusTotal, which alerted to it being a backdoor/trojan.

In this space especially, people need to be extremely cautious about everything they bring into their network environment. Only takes one mistake to have a realllly bad time.

Some pics from unboxing to setup:

Which FW did your T15 ship with?

PCB:
29-45-32-47
32-47-37-54
30-44-38-53

Chip:
44-60-47-62
47-62-52-69
45-59-53-68

Temps for my T15 at 75ºF ambient intake temp, normal mode. You may have more overhead, temp ceiling-wise, if you go with the T15.

So some notes from my Antminer T15 setup experience:

Took approximately 6-10 minutes on average for my T15 to start up and complete tuning/begin hashing.

I initially had a network error, which turns out to be because the T15 does not accept pool addresses with the "stratum+tcp://" prefix. You simply specify the stratum address, e.g. stratum.slushpool.com:3333

Currently consuming ~7.5 amps at 200V, so around 1500W at normal mode, hashing at 23.5 TH/s.

This T15 came with the 12/18/2018 Firmware installed which may be why the start up sequence was quicker, or because its running in a 75ºF environment.

Also, my T15 HAS the top cover, so no exposed rails here.

Not suspicious, everyone knows about the shared skills between lingerie designers and electrical engineers.
/s

Possibly a couple of loose heat sinks? A couple of heat sinks out of alignment, disturbing airflow and creating dead zones of air?

Basically, have you tried looking closely at your boards to see if there is anything visibly amiss?

2k AND he wants you to cover shipping... is it December 2017 again?

Let’s not forget how Vosk got review units from AsicMiner (clear scam) and didn’t advise anyone to steer clear. I wouldn’t count him among those you would trust for miner reviews, more like someone who would make a video proving something ‘exists’

They chose him for a reason.

You may want to look into what are known as swamp coolers, assuming you have access to a cheap and readily available water source. Very efficient cooling, especially when the air is very, very dry like I would imagine the region near the Sahara to be. If it also happens to be humid, then these will not be very effective.

Thanks! This is the first time I've bought a miner brand new from Bitmain, hoping I don't get screwed by their low-reliability. Also hoping that the limited batching will result in higher than normal reliability rates for these new machines. Plus I got to finance through Paypal so that helps haha

Just bought a T15 off of ebay for 1k, free shipping, no customs. I will update this thread with pictures, info, and my impressions.

So glad I could be of help and that you've successfully returned to factory! Hopefully future releases will go better.

Braiins support mentioned that they're working to do away with the dependency on backups to return to factory firmware in future releases.

Are you certain they have unique MAC addresses? I think as part of the bOS upgrade it changes the MAC addresses if you don't specify them.