Have any of these shipped/appeared in the wild yet?

I'm sure this trade scam is still available

Everyone knows that buying in bulk increases per unit prices!

To provide an update on the reliability side:

Both my T15's have been hashing away at 23.3 and 23 TH/s without problem for a few months now. Consuming 1475 W at 23.3 TH/s for an efficiency of just under 64 W/TH. This is at 208V.

https://pangolinminer.com/product/whatsminer-m21-with-psu-shipout-during-august-1020/

Price is $850 for the pre-order currently.

That was my belief from the photo's as well. Definitely 4 fans, unless the pics are wrong.

Have you manufactured any chips? Is there anything physical that you can use to prove your claims?

I've ordered two of these from nsummy, will update when they are shipped/arrive.

Just noticed, this is using 16nm chips!

Quote from the product page:

Why do I remember the whole covert AB drama being that the covert piece was that their AB allowed them to do so without a different version number? And that SegWit would make this covert version incompatible and thus their vehement opposition to that prop?

I got screwed over pretty badly by the last order of 741's getting canceled by Canaan and then having my order changed to an 821. I agreed to that change, thinking I was getting the best of the next generation of miners, only to have the 841 come over very shortly thereafter at a much, much better price. I'll never do a preorder in general or buy the *21/first set of a new gen from Canaan again.

I did the above ordering through minerwarez (glad to see them have virtually nothing for sale after the treatment from them) and was promised by them we would be receiving a "special gift" as a thank you for putting up with the delays and getting screwed by the immediately dropped price for those who did not preorder. Never received anything and my inquiries were ignored. To be clear, I blame the distributor for this entirely.

Understood Phil. I will say that I did pay less than the de minimis for avoiding the tariff, but the invoice was (blank).

Here I am after winning the Stanley Cup last year

I have an A4+ and a T2T-24T, both bought secondhand with the T2T in new condition. Both have performed without physical issues since last summer thereabouts. The firmware that the A4+ came with was terrible in every way possible, but in December (outside warranty), their support helped me upgrade to their new firmware which follows the same design and functionality of the T2T series which is much more user-friendly.

However, I've never been able to get the T2T to actually hit 24TH/s. Closest I've gotten is 23.4 which I guess is close enough to spec to be within +-5%. Also, the new series of firmware for the A4+ tells you its tuning to different settings, but doesn't actually change its tune so its hashing somewhere about 635MH/s. The T2T does faithfully change its spec.

Fortunately and unfortunately, I cannot speak to Innosilicon's direct purchasing or warranty servicing.

So here is an update on trying to get the PSU from my M10 replaced under warranty:

Pango is saying I need to ship them back the damaged PSU at my own expense (don't like it, but no big deal and standard for the industry), but are also asking that I pay the shipping for them to send the new PSU to me.

Costs are ~$75-80 to ship the PSU to them in China and the estimated shipping from Pango is $45. All together ~$120, or the cost of a brand new one without shipping.

After over 2 weeks of troubleshooting that I eventually solved with the help of Phil and not Pango support, I now to have to pay over a month's profit with this machine to get a replacement part under warranty.

If Phil wasn't kind enough to sell me the PSU we used to definitively prove the damage to the factory PSU, I would have the choice of mining at reduced hashrate and hoping the PSU did not fail completely down the road or adding well over a month to the break-even date for this purchase.

Not happy with the support I've received from Pangolinminer.

If you want an APW thats damn near silent, I would recommend the APW5. Amazing PSU's.

I could take one, pm sent.

Scott just provided an estimated shipping date of end of August for batch 2:

If I absolutely had a pick a cloud-mining operator, as in gun to my head pick, I would probably take Bitmain's offering. Simply because its being run by a known entity that will likely be around for some time to come.

As for buying into the mining market now, I would ask the two most important questions (the second one is new):

1.) What is your electrical cost?

2.) Do you have 200-240V power available?

Given his costs are free, the second one is all that remains. I ask about have this type of power available because it would appear that with the ever-increasing demand for more efficient miners that manufacturers are moving away from separate PSU's which would allow you to use 120V to integrated PSU's which only run in that range. If the answer to #2 is no, then the only machines available to him are previous-gen machines.

Going with the assumption he only has 120V available, his options are quite expansive and cost-effective. S9's with AB fw on them are cheap and relatively quiet thanks to the reduced power consumption. The Avalon 8 series has a high degree of control by which the user can lower the power consumption and therefore the heat and noise. The Innosilicon miners I believe only have integrated PSU's (with the exception of their alt-coin miners).

Recommendations:
S9(i,j, variants) (put the AB FW on it)
841
R4 if you want peace and quiet (also has AB fw)

Good luck!

Well great news! There can be no doubt, the PSU was damaged and was limiting the freq achievable by the boards. Having swapped the PSU with the replacement Philipma1957 sent me, the freq are now:
491-524-478

Previously, it was the rarest of tunes that allowed for the middle board to scratch 500, with the others hovering in the 440 range. Hashrate is now 31.1TH/s.

Pics will be added later on today for those with more EE experience to dissect to see if there is any visible damage. I will say that the black sheeting within separating the top of the PSU from the bottom appeared to have been separated from the force of the pop, with only a tiny section of the adhesive holding it closed. The replacement from Phil, even from the exterior, was clearly closed.

Thank you so much Phil, your willingness to experiment for this community is a resource we all benefit from greatly.

Edit for Photos: