pretty simple question.

The original firmware did 14000 gh at 1475 watts

I put in the Nov 7 firmware it does

14006 gh at 1257 watts   a watt savings of 218 watts since I will be setting up a lot of them  it is a nice savings.

Antminer-S9i-xilinx-201805222008-autofreq-user-UBI-NF.tar.gz   ...... original

Antminer-S9i-all-201811071119-autofreq-user-Update2UBI-NF.tar.gz ..... I am using this one

Antminer-S9i-xilinx-201811301418-autofreq-user-Update2UBI-NF.tar.gz ........ so how does this one do?

Note to load the nov 7 version I had to load this below

Antminer S9i - Package to Fix Upgrade Failure
FileName   Description
fix_mac.tar.gz

all info came from below.

https://service.bitmain.com/support/download?product=Antminer%20S9i

on a different note
has anyone flashed s9j to s9i and improved efficiency ?

and lastly

I have a really nice s9i 1260 watts  fans at 3200 and temps at 77
I have an okay s9i        1295 watts fans at 3650 and temps at 77

seems that I got lucky on one of them