Re: ANTMINER S4 Black Friday Deals 0.409USD/GH/s, FREE International Shipping

How many people have upgraded the S4 firmware to: initramfs.bin.SD-20141016.tar.gz from the bitmain website?

I only ask because mine is still running on the factory firmware no problem with difficulty manually set, so I'm kind of wondering if I should bother with the upgrade.

I upgraded all of my S4's to this firmware and gained at least 5% hashing speed on the pool. I also set difficulty to 2048. 225 Mhz 0725 volts . They are all hashing at least 2200 and are stable meaning I don't have to hard reboot them every day for crashed chips or reduced hashing speeds.

When I tried 225 Mhz with 0725 volts, it wasn't stable. I went back to factory default setting of 200 Mhz 0725 volts and even with upgrade firmware. Either I'm doing something wrong or your S4 is better than mine. Huh

Ok the most stable settings I can find are 225/0725/2048 with the newest firmware. One key is the temperature. I am blowing cold air from outside right into the S4's. They are not even warm really. The air coming out the back is cool. Now one thing that can slow down your hashing speeds at the pool, even though the S4 shows normal speeds, is your ROUTER. If the S4's slow down reboot all of them and your router/modem.
Also if you see any crashed chips, or the speeds slow down on the S4 itself, or if it goes offline, or anything just do a hard reboot. Power off/ power up. It works everytime.