Topic: Bitmain S21 Series (Read 399 times)

Ordered a S21 Hydro a few days ago. Will be sent to me in April.

I’m new to mining, and I wonder if someone knows what the material in the S21 Hydro cooling blocks is?

I think that I perhaps need to buy a set of radiators and a pump that is compatible with the cooling block, but I do not find this written in any of the sparse documentation.

I have two leftover radiators and a pump from a computer build, but these are not recommended for use with aluminum blocks, it’s a EKW D5 pump and two EKW P420M.
Either I buy four more of these radiators or I will look for some that is copper free.

You still need to add roughly 160W for the 4 fans, so that takes it to 3650W, the hydro will most certainly be 3-phase wired, it would sit on the shelves for months and then sell for a lot cheaper just like what's happening to the older hydro version.

17.5w/th for an air-cooled miner is certainly a huge improvement, the M50s++ is 22w/th so MicroBT has a lot of catching up to do, my guess MicroBT will launch M70 sometime early next year with similar hashrate but more like 19w/th or so.

I would get two for testing.

here is an interesting blog entry about the new s21 miner from Bitmain:

https://hashrateindex.com/blog/what-is-the-antminer-s21-everything-to-know-about-bitmains-latest-asic-miner/

the pre-orders can now be created on luxor.tech: https://go.luxor.tech/antminer-s21
and in this tweet you can see a little video of the new mining 'monster': https://twitter.com/BitcoinNewsCom/status/1705188333213650989

17.5 is nice was hoping to see 15th  and 17.5 x 200 = 3500 watts which is a lot

the hydro will pull a lot of power.


335 x 16 = 5360 watts

Bitmain has released specifications for the S21 Hyd and S21 miner.
https://twitter.com/BITMAINtech/status/1705115773499478154

S21 Hyd.
Hashrate：335T
Energy Efficiency: 16J/T;

S21
Hashrate：200T
Energy Efficiency: 17.5J/T.

Nick Hansen also let that company's pool push meme spam inside the Bitcoin blockchain cheaper than normal transactions...

And yet the S19 series started with a 7nm part (BM1398) and then moved to a more efficient 5nm part (BM1362) that originally was the J, confusingly now all seems to use this chip regardless of them using the J letter or not; except the XP with the 5nm (BM1366). In the process they degraded the quality with the cheaper aluminum treatment, or from their point of view, "optimized their process" since the fact people were running the miners more efficiently meant that they were leaving "too much" margin for "improvement" (could be made cheaper).

Unsurprisingly, in typical Bitmain fashion, the "newer" models are using the lower yield chips. The "good stuff" left with the 104T and 100T Js, the "non Js" rated for 90/86/82 are simply the lower yield leftovers. Again, typical Bitmain fashion. Too bad some people don't see it and get lured by the "cheap price".

I agree with philipma1957 predictions. Unless they use the recently announced 2nm node by TSMC, but even if that's in the plan, its probably still a year or two away, so like they did with the S19, may actually start with a 5nm part not terribly more efficient than the XP, just like the original S19 Pro 110T.

Desiwe has a more interesting approach, but its just bruteforcing higher efficiency by running parts slower and better cooled (8nm Samsung). But if they manage to upgrade those chips with an even lower node, then Bitmain will have something else to worry. Who else uses Samsung? Ah yes, MicroBT...

Your price prediction is pretty close to what hash_bender leaked, efficiency, is not so.


https://twitter.com/hash_bender

I think 15w/th is doable given that S19xp is reported to do 18-19w/th underclocked with the proper firmware, so 15-16w/th stock for S21 pro won't be too far stretched.

Keep in mind that while Nick Hansen is the CEO of Luxor and probably has some Bitmain insiders, his info may be totally wrong.

great question.

30 a th for a 300th machine is 9k
30 a th for a 200th machine is 6k

my guess is 18-19 watts
and 30 a th
so between 6 and 9 k

a lot depends on if they want to force 2 c19/c20 cables to run the unit.

Good news! Wonder what price will be...

I bet it is 18 or 19

Not 10 or 11

although 18 when under clocked could do 15

I wonder if they will stick with 2900-3300 watts for them

19 watts per th at 3300 = 173th

18 watts per th at 3300 = 183th

it would still be able to run on a 20 amp circuit

or do they step the power up to 30 amps

using 2 c19/c20 cables

say 5400 watts which is about 300 th.

that would be a real beast.

this cable can do 30 amps.

use 1 of these

https://www.amazon.com/Conntek-YL630L630-Y-Adapter-L6-30P-L6-30R/dp/B00SJESLEG/ref=sr_1_5?

use 2 of these
https://www.amazon.com/NEMA-L6-30P-C19-Power-Cord/dp/B004WOE85S/ref=sr_1_5?

and you could safely send 5400-6000 watts to the s21

So we could see 300th unit but cooling will be hard.

maybe 6 fans 3 in and 3 out  and taller

Corrected - Thanks!

Small correction, it's not 1 J/T but 1X J/T as in anywhere between 10 and 19.

X=(0,1,..,9)

Just announced on Bitmain's socials -

https://twitter.com/bitmaintech/status/1691315238287933440?s=12&t=_uFk2ClAhWUAcozE2BHGeg

Premiere at WDMS, breaking closer to 10 J/T. Pretty wild how far mining has come in over a decade.