Quote from: Bitkoinzz on December 16, 2014, 11:48:09 PM

Quote from: Sandhog on December 16, 2014, 02:25:58 PM

Quote from: MissouriMiner on December 16, 2014, 01:33:11 PM

Quote from: Sandhog on December 16, 2014, 12:14:56 PM

Quote from: Bitkoinzz on December 15, 2014, 09:11:55 PM

Quote from: neo9436 on December 15, 2014, 06:59:14 PM

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.

Maybe I need to upgrade my firmware. When S4 hashing rate drop to below 1500 Gh/s, my pool with Ghash.IO goes to zero. I had difficulty set to 2048 manually.

Looks like your hashrate dropped to 0 over 14 hours ago. It just took that long for your average to get below 1500. I upgraded all of my S4's to the latest firmware (Oct 16) and have not had any issues, except I needed to reboot another time after the firmware upgrade, on all of them. All of them ran poorly after the automatic reboot from the firmware upgrade. But I always set the difficulty manually when the option is offered by the pool.

Do you know how high the board temps are getting? The UI shows 50-51 now, but it hasn't been hashing. I've seen this (hashrate drop to 0) happen with temps in the 60's. They should be able to handle 60, but I'm just passing along what I have seen. I have also seen this happen when trying to overclock with stock PSU. (I can see in your screenshot that you are not overclocking, but wanted to mention it anyway.)

You should setup some kind of alerting. You don't want to lose half a days worth of mining on an S4. There are a couple home grown monitoring programs out there. They require a bit of work to set them up. I see that Justin Ramos shares open-source monitoring software. I don't know him. I have tried his P2Pool code, which is good and has extra reporting. I intend to try his monitoring solution. I think you have to install 3 software packages. The API client, the manager, and the monitor. https://github.com/jramos

I also ran across this site, if you want fast and easy. http://www.awesomeminer.com/ There is a one time charge for the version that send notifications. There is a free version to try. I don't know this site and am not endorsing them, but their product looks good. If you search for "bitcoin mining monitoring", you will find others.

I have to manually set difficulty to 2048. Otherwise, it doesn't hash more than 180 Gh/s on the pool while S4 shows it's hashing 2000+ Gh/s. I check my S4 B2 which I received in early December which has latest firmware. I tried to set to 225 Mhz 0725 volts then it went to zero. But before, it never went to zero. When hashing speed drop below 1500 on the S4, pool goes to zero. When I set pool difficulty to anything less than 2048, it never hash more than the difficulty setting. S4 temperature never goes up above 52 since it's winter here and I have all the windows open.

I'm trying different settings to see which would work the best and optimized mining.

I didn't know pool went to zero since S4 was running. With other miners' noises, I tend to be not hear the noises as much. I guessed I have adapted to the miner noises.

Anyhow, thanks for your insight.

I hate to say it but there are only a few pools that you will get full speed hashing from I can find. I tried several and right now I have all S4's showing 2200 + at the pool. i can get them to 2300+ but the chips sometime crash. It is that difficulty rate issue. Some pools you can set the minimum and it works and others you just can't get them to full speed. I am not here to promote a pool but the one I use starts with an S.

My S4 B2 already has updated cgminer v4.6.1 It still only runs for couple hours and not hash anymore. I don't see chips crashing since all shows 00000s and no x. I'm going to reset the miner to factory setting and try again. Something is not right.