Antminer T21 3 Phase Watch Out!

So I just ordered a batch of Antminer T21 190T, and guess what? Turns out they run on 3-phase power. I had no clue they were 3-phase and there was zero info on the Bitmain site when I placed my order, so it was totally unexpected. This is gonna be a real pain for me and makes selling them later a nightmare. Not much can be done about it now, but I figured I’d give a heads-up to others so they don't end up in the same situation.

yeah I got 3 of them 1 is here and 2 on the way. There is an adapter but it does cost bigly not sure if it does 1 of them it may https://www.phoenixphaseconverters.com/collections/phase-converter-transformer-packages/products/copy-of-5-hp-phase-converter-transformer-package-230v-single-phase-to-460v-3-phase maybe does 2 of them certainly 1 https://www.phoenixphaseconverters.com/collections/phase-converter-transformer-packages/products/7-5hp-phase-converter-transformer-package-230v-single-phase-to-460v-3-phase I may need this I can feed it 230 single phase  at 50 amps https://www.phoenixphaseconverters.com/collections/phase-converter-transformer-packages/products/15hp-phase-converter-transformer-package-230v-single-phase-to-460v-3-phase if I run the t21s at a low speed option the high end adapter may work. or find a host.

not impressed with bitmain tbh, shame there are not more brands to choose from.

There are: Canaan and the Whatsminers from MicroBt. For one thing both are generally far more reliable...

Indeed, Im already leaning more towards Whatsminers... not only do they appear more reliable, but the footprint is also smaller.

I have 6 whatsminers two m30s and four m50s they are nice gear.

Once the Whatsminers M50's spin up they run great for months on end. I just don't get why they preheat and take so dang long to fire up though... But they are great!

yeah the whatsminers are very nice units.

Whatsminers are BY FAR the best quality miners I've ever seen. I've just sold a batch of 24 x M31s+ 82T. They were the first miners I ever bought (back in April 2020), and in 4 years only 1 x Whatsminer went faulty (dead PSU). No other problems whatsoever, no dead hashboards, not even a dead fan! As for Antminer, I don't think I have any that have lasted more than 2.5 years. The only reason I buy Bitmain is because they are easier to get hold of.

All my farms are 3-phase, so it's not the end of the world... however it does mean I need to rewire, and can't distribute them in the way I wanted to. They will also be very difficult to re-sell when I upgrade

So far  I think I screwed myself bigly on this. Too bad you are not USA based. I can’t find a host so far.

Ahh - that sounds like you were caught out too then. I think it's stupid that Bitmain named this the 'T21'. AFAIK they have never had a 3-phase air-cooled miner. By calling this a 'T21' it implies it is simply a 'T' version of the S21, but single phase vs. 3-phase is such a big difference. Maybe they should call it the T21-3, or something to make it more obvious. Can you not return them for credit? My supplier also suggested you can convert them to single phase with an aftermarket PSU

Video here re: converting T21 to single phase operation: https://www.youtube.com/watch?app=desktop&v=0XR0nyLKroI I guess it could work out ok if you could get a decent return on the unused 3-phase PSU's. There will be demand for them eventually (as they start to fail)

the video link looks like it will solve my issues. I shot a pm to altairtech "Okay purchased 3 t21's did not realize they were three phase.  if I get https://altairtech.io/product/luxor-microsdc/?attribute_control-board-type=Xilinx https://altairtech.io/product/apw121215c-bitmain-power-supply-psu/?attribute_version=ver+f https://altairtech.io/product/antminer-power-bar/ which I read on this https://bitcointalk.org/index.php?topic=5490991.msg63887714#msg63887714 and this video https://www.youtube.com/watch?app=desktop&v=0XR0nyLKroI will I be good to go." once he confirms I will order and hook up the t21 with the fix.

I look forward to hear how you get on with it. I understand the T21 (with standard PSU) will clock to 280TH / 5610W on Asic.to firmware

altairtech told me those are the correct parts. I am placing an order now. Order details Product   Total LuxOS Antminer S19 Firmware microSD card - Xilinx × 1 Control Board Type: Xilinx $1.99 APW12 Bitmain Power Supply PSU (APW121215) - ver f × 1 Version: ver f $239.99 Antminer Power Bus Bars × 1 I will let you know how it works out. edit here is the issue with the buss bars sent to me as you see too short.

parts came for the refit I will post results later today. and here is where I stand. fuck fuck fuck shit shit shit and many other curse words. 1) My T21 has the wrong controller CVITEK So I can not  run luxos . I could order a controller  from altairtech T21 (Beta)   AMLogic   BHB68701 then install luxos to trick the controller to using the psu. Next issue my new  buss bars are not the correct length. So they do not quite fit .  not sure why this is true but it does seem to be a problem,

So I went to my parts chest. Found an epic controller updated firmware to 42 the newest and bang I got action on the t21. with the s19 psu. single phase I also found buss bars from a s19xp that fit. So altairtech sent me short/misized buss bars. Still fucking with the software. but I do have single phase psu working. So I needed an epic controller I had one cost is 155 I needed buss bars I ordered one and got one that was too short I took bus bars from the s19 xp I have been modding I used a new s19 psu I could have used the one that is on the s19xp Since I have two more coming it is not an issue that I paid for parts. I will ask Altairtech why I got the wrong buss bars. based on what I did I actually think that the t21 could fit in the 1 board s19 build I did giving you a sick 50th for 950 watts more tests to come. my meter read 2782 watts for 157th that is about 17.72 watts a th