may be you should post it on z9 general topics https://bitcointalk.org/index.php?topic=3509006.1480 not on this pool/fork topics.

IMO ...also not an expert
considering
- current thermodynamics law
- chipe temp measurement is not 100% accurate (may be close)
- i do not know the placement of measurement sensor
- other things
you might want to (DWYOR)
overclock it more... I believe the stable oc is now at 15-17...you might get 20 (or burn it before you get to 20) ...by deceive the temp sensor
but again.. I just tempting your couriosity, and other who has spare/experimental unit at home... in case you do..post it ..will you ..on generic z9 mini talk  
I ve read somewhere in the forum ..he/she has fried his/hers z9 ..most likely by OC it (sorry forgot the detail)
The point is ..consider the risk..

nevertheless its very interesting discovery

reverse the position or just the airflow...ss and photos would be nice

z9 is out...
    Power consumption: 1150W± 10%
    Hashrate: 40.8k Sol/s ± 5%
Let's see how much it can be OC for the next 2 mo
I did not see anything on their tweet yet..the website shows its available though..1-10 sept batch
They ussualy post it on soc med first than update their website...if I remembered it correctly
----
It's way out of budget for me.. 3319+86 +tax..more likely to pay for 4200 usd here

GPU win vs asic on bytom ..atm. This is a surprise.
Is the b3 really not overclockable..cant edit something on config ? (not to provoke anyone..do it carefully)
I dont have b3...just curious

jadi gini gan..kalo modal dibawah 100juta ROI nya lama...kalo di atas 100jt ROI nya lebih lama...

I dont really understand thermodynamics and all but is true that your ambiance temp is below 20c ?, this kind of extension modification not working for tropical climate (ambient above 25c), it only make it hotter (by 2-3 or more in celcius, on s9)
As for the noice reduction,  isn it because of projected sound ? The longer the cone will make lower noise but if you measure it on the projection area (in front of the cone) its the same db produced

Anyone tried to put additional exhaust fan on z9 mini ?

@mfurman I also get bad link

yeah..this one from loose_concetrate

contoh yang nyata...jadi kalo menurut hitungan sekarang (dg asumsi sama dengan agan)..kalo saya beli rig seperti punya agan...BEP nya 2,5 - 4,5 tahun...gitu yak ?

what country are you in ?
here in indonesia we pay (custom fee) to dhl/feedex/ups after custom released it, applied to personal importer, dont know about company importer.
Doesnt matter what I filled on bitmain invoice/field it always goes to dhl/feedex/ups tax number as importer.
Super easy but super expensive tax (about 30%)

63 usd for z9 tax ? That is cheap. I just charged by dhl for custom related fee: 110usd for 2 bitmain psu (210+65 purchase)

so what is your order number ?

i'm fallowing this thread but not b3 owner...can you elaborate more..
so..batch 1 owner paid 2.6k usd (right)? and get about 530 usd partial refund

Nice info about refund..first time I heard..well i've heard b3 refund but cant confirm the truth
Care to share some detail ?
If.you dont want to scroll, there's also working pools thread
https://bitcointalk.org/index.php?topic=4404847.0

I dont understand your question.
I have never heard bitmain refund before...
if you scroll up you can see that 77 unit is sent
You should got their email about voucher or double unit..depend on your batch.

500 us is interesting offer if you live in the same country as me..but import tax is expensive here in Indonesia.

I believe that btm is interesting coin...most likely to hold for a year or two..
I cant find much info about other tensority coin, as first of its kind and "controlled" coin,
but B3 might be bad bet (for now)...its about 7 hash rate of 750ti
maybe it should have newer firmware for performance improvement.

So it about a month running..with decent profit..
I believe i have seen b3 on ebay about 800usd or so..couple days ago
Did not pay much attention though..

I'm newbie but here is my opinion

worth it..(meaning profit)..some
If you start now, you mean ROI timeframe (right?)
Cant really say for sure...depend on many thing.
1. how much you willing to invest ..time and money
2. withdraw timeframe.. you want to hodl or sell it regularly
3. The electricity price on your miner and other expense
4. Coin price

There are many profitability calculator available that you can check as refference
It always go with saying high risk high return ...if you willing keep yourself uptodate with crypto news

Info aja ya..bukan promo  ..coba aja di itung pake calculator
untung apa gak

Ada diskon an s9i 14th/s dr bitmain sampe tgl 12 juni
Antminer S9i-14TH/s

750 with psu // 665 without psu //shipping  June 21 - June 30

tapi gatau kenapa dari pagi ga bisa buka web bitmain

Found one pic ..not mine
https://cdn.discordapp.com/attachments/363890088720990209/453298546133696542/IMG_20180604_163651316.jpg

thanks.. keep us informed.