Topic: 4 x Z9 mini or 1 x Z9 ? Z9 teardown (Read 208 times)

...and ship via DHL, not UPS. My UPS Z9s got hit with 25%, DHL ones just got 2.9%.

Batch1 minis, if you can find them at a good price, hash well, and overclock well.

The Z9s are pretty variable -- most will OC up to 650 ( and around 55-57kSol. Some will go up to 680-700 and get 60-62kSol... but those are the rare ones.
They are voltage limited.
(overclock for Z9: https://bitcointalksearch.org/topic/efudd-z-series-fuddware-23-z11z11ez11jz9mini-5036968)

-j

One item on the cost analysis - at least if you are in the U.S., is the 25% and 2.6% tarrifs.  The Z9 will trigger the > $2500 incoming to the US tarrif check, guaranteed, and cost you a lot more.

If you buy (3) Z9 mini's at a time, per carrier (fedex/dhl/etc) and spread it out to no more than 3 at a time, you stay under the US customs $2500 import duty 'trigger'.

I know this from personal experience, with at least 6 batches of 3 x Z9 mini's over the last 35 days.  Not one has hit the 25% tarrif, 1 of the 6 hit the 2.6 % tarif (A dhl package from china vs hong kong).   I can't say with guarantee that the carriers or government wont mail me a bill 2 years from now for the 25%, but everything I've personally experienced in prior orders and the recent is stay under $2500 per 'shipment' (dont order PSU's either so its not a complete product) and you can avoid it.

Z9 full is not worth vs the z9 mini in my opinion, its cheaper for the mini's when factoring shipping tarrifs in the US at least.  But I prefer the divide and conquer, in case of hash board or other failure vs a bigger box that could all die at once.

P.s. rethink your qty (4) z9 mini plan of order, get only 3, and stay under the $2500 limit.  If you want more, order a second batch via a 2nd carrier (fedex is best, then dhl, and ups last on my list personally for using).  That will avoid things for you (based on my personal experience, i've read elsewhere others have not been so lucky as me).  but I guarantee if you exceed $2500 on any US import, you will trigger the full review and get hit.

I'm pretty sure in the near future we should see custom firmware and/or some hardware changes that would take one or the other to significantly higher profitability.
Z9 seems more power/temp limited than z9 mini.
But we need to see the Z9 hashing board to confirm

thanks for asking mods to move it to the right section.

you are in the wrong section I asked mods to move this to altcoins.

a z9 mini = 745  and there are 55 dollar coupons


you can use 4 coupons = 220 off

4 x 745  = 2920 - 220 = 2700

it does 10k sols at 300 watts

4 do 40k sol at 1200 watts


a full costs 2862 - 55 = 2807

should do 40k sols at 1150 watts


down side to the full size if it breaks you have 0 hash

up side to the mini if 1 breaks you have 30k hash

the mini could be placed in multiple spots
the mini can use a smaller psu

I'm trying to decide between purchasing 4 x Z9 mini and 1 x Z9 full.
Could someone please post a Z9 full high resolution photo of the hashing board?
I need to do some analysis of all the potential improvements, limitations, voltage / current adjustments that are likely to appear in the upcoming months.