Quote from: Deeped on July 09, 2019, 10:28:57 PM

Hello,

I am trying to figure out which miner is best. I have 120 amps in total of 120V power I can use. The newer S15 and S17 have built-in power so they cannot be configured to use 2x 120V power supplies, right?

No, you need a step-up transformer because the required power is around 200v/240v to reach the minimum hashrate.

Quote from: Deeped on July 09, 2019, 10:28:57 PM

The safest bet would be to buy the old S7 because they're cheap and on Amazon/eBay, and would recoup their cost in a month, but never would earn much. (power supply would cost more than the machine).

Not worth it to buy it may cost you more in electricity consumption than the newer miners.

Quote from: Deeped on July 09, 2019, 10:28:57 PM

Other thing I considered is Z11, that SEEMS to be ok at 1400 watts on a 20 amp breaker? But very hard to find a reliable source to buy. For example,
the newest one is the 135ksol, but those are not out yet, are they?

20 amp breaker for a single z11 miner is fine make sure that you have 220v/240v to give enough power.
Much better try to contact the bitmain for their next batch to buy these miners.

Quote from: Deeped on July 09, 2019, 10:28:57 PM

But I cannot find any mention of their site on this forum.

About the link, I tried to search it here but it seems someone promoting it here on the forum but all of them are deleted possible it is scam and spammy. Better to stay away from this website if you want to buy antminer ASIC better to directly buy to the manufacturer.

Quote from: Deeped on July 09, 2019, 10:28:57 PM

On the other hand, people vouch for that lakeshore xyz one all the time, and they don't have much in stock - either pre order for z11 or hydro S9. But at least they show mostly out of stock, whereas this genimining.com has EVERYTHING in stock. (But site looks well done otherwise, even better than the xyz site.)

As I told you above better to directly buy to the manufacturer to be safe it is not safe to deal with a website which is not well known here on the forum.

Quote from: Deeped on July 09, 2019, 10:28:57 PM

Anyway maybe pre-ordering Z11 is better? ~snip~

Yes it will be better to pre-order directly to https://shop.bitmain.com

Quote from: Deeped on July 09, 2019, 10:28:57 PM

Any other things I should look at? Trying to get out of the GPU game, these things will never ROI and I fear there will be no more good GPU coins soon.

GPU still profitable if you are paying low in electricity bill but if you are living in high electricity rate better ignore GPU mining.