Topic: A4 Dominator - Pre-Order Group Buy - 280mh, roughly 1000w, $1800 + shipping - page 30. (Read 122594 times)

thanks mate!

Batch 2 latest
https://www.dropbox.com/s/fuyz1r7cy4pkeir/G5-20-V1.0.3.rar?dl=0

Anyone has a link to original stock firmware?

Thanks for the feedback and input.  I really do appreciate the input.  I was just a little cranky yesterday with the news of requirement to either replace the STM or find someone who can flash it.  

I doubled back to retry the higher diff settings again.  Tried it again on zpool, but had restarts within 20 minutes, and it never ramped up to reflect anything close to the miner reported hash rate.  Only showed roughly half of the hash rate so that was a non-starter.  Just jumped back on Prohashing.  Those guys do a great job and have tried to tweak the pool for the A4.  I am pointing there right now.  Still seeing restarts there, but the hash rate looks better.  I will keep experimenting.

On the suggestion about the miner orientation and dirty air.  I hadn't considered the orientation of the cubes.  I will make those adjustments today.  I have been trying to figure out what to do about the air situation.  I just found some air conditioning filter foam on Amazon that I think I can cut to fit the back of the cubes and cut out around the plugs.  I will keep everyone posted how that works out and let you guys know what I bought if it works OK.  

If the A4's are super sensitive to ambient air temps then I will probably have problems going into the warmer months.  I have box fans blowing on the miners, and I have a big industrial fan that I use to move air during the warmer months, but the temps still get quite warm even when you keep the air moving.  So I am concerned about the ambient temps issue.  When I look at the 2 miners I have running I see one runs consistently higher temps than the other.  Both in the same location, same ambient temps etc.  I may need to try and blow some dust out of them to see if that helps.

I am looking forward to hearing a follow up on the B3 miners.  It would be nice to know if the issues are actually fixed.

Someone pls take a pic of both sides of the board and post to imgur. Also take a pic of the CPU chip on the board close up I want to see what other components are around it in the event we have to pull and swap parts.

Hope so.. if a reflash is possible it could be an easy fix imo.
Im happy to try it if innosilicon provides the firmware and information.

If the question is removing/replacing the chip in the upper left corner it's doable, but will require air tools, good flux, and a preheater. I can do this with the tools I have if needed.

However I'm a bit surprised you can't just use a jtag programmer to re-flash the chip.

I'm running them in an industrial building I lease. You're right about the air quality. It seems ok when you're breathing it  but in truth it's quite dirty, especially when you're piping 230CFM across those cards.

2-1/2 yards of G4 filter across my air-intake has fixed that little problem.  I may have to look at commercial filter panels at some point but for now I'm happy with my home made solution.

In terms of air temp, the ambient daytime temperature here is less than 72f most of the year, so why pay for HVAC when it's free. I will probably have to drop voltage and MHs on very hot days (25-30 C), but the key part of my design is exhausting the hot air into a totally isolated environment and moving it away quickly, like a modern DC with a hot and cold aisle. I'm also trying to maintain a pressure differential between these 2 environments so air will always flow down the pressure gradient. I'm not sure I have that perfected yet as the filter has upset the balance but they are running quite stable now.

Heck, mine are in a datacenter with full AC, and can't keep them under 50c, even with the room temp at 72f.
Air is pretty clean here, no buildup of any kind. I think they filter the AC air before bringing it in.
Are you trying to run these in a household setting? That's gotta be pretty hard, since air will definitely be dirty in comparison.

I had the same experience initially. Note that my diff is 2-4x the recommended setting.

The other thing to do is try a little more voltage Longsnowsm. I'm running my B1's with 822-824@1200 Mhz and my B2's at 826-828@1224.
The other thing I've encountered (and it's mostly my own fault) is that dust/grime can collect on the back of the card and cause the USB interface to drop.

When you say you have a dropped card, is the LED still lit and the card visible in the /miner.php page? If it's off it's probably (based on my experience) because the back of the card is dirty. This is especially true if you orient the miners so the cards are horizontal. I stacked mine initially using the male/female rails and the top card kept failing. Took me a while to work out what the problem was and after cleaning them with PCB cleaner I've oriented them so the cards are vertical now and they've been running for over a week with no hard reboots and all 4 cards bouncing back after each soft restart most of the time. It's not perfect yet, I think I may need to play around with voltage a little more, but they are 100x better than they were.

Also, I keep them fairly cool. I directly vent the fans into a different room and push a lot of cold air through them. Most of the time they're in the 45-52 degree range.

HTH.

Look on the underside of the card through the grill and you can see there's a group of exposed contacts. I assume the jig locates the card so some spring loaded pins can make contact with these and interface directly with the MCU.

Some of us tried those exact settings on Prohashing, and got more restarts than you can shake a stick at, more dropped cards than you can count, and nowhere near that hash rate.  I see some on the Prohashing forum saying that works for them.  It does not work for the 2 miners I am running.  They become so unstable as to be practically useless for me.  Jumped over to Nicehash because others said that worked for them.  Still did not work for me, lots of restarts and dropped cards.  Just tried zpool last night and this morning... Same story.  Low hash rates, restarts, and dropped cards.

And when I say hash at the advertised rate that is at 280mhs.  So far I am lucky to average 250mhs on Litecoinpool which is about the only place I have tested so far that the miners are halfway stable.

And if that is the STM on the boards then Inno needs to replace boards, or entire miners.  Or they can contract with someone to do the warranty work to fix the B1 and B2 miners with the firmware.  This is completely UNACCEPTABLE!  

No, I'm still inside my warranty and TBH I expect this kind of support (firmware/software) to be available for the lifetime of the miner.

Like this? "h=off d=65536"

100-B1
00:27
Megacoin
269.62 MH/s Megacoin
Difficulty: 65,536
Target difficulty: 65,536 (static)
Work restart delay: 2.446s
Current restart penalty: 1.000
Minimum network difficulty: 50
2hr share count: 454
2hr avg hashrate: 269.62 MH/s
Since first share: 18:41:49
Mode: Pay-per-share
Merge mining restarts: dynamic

107-B2
00:21
Guldencoin
271.41 MH/s Guldencoin
Difficulty: 65,536
Target difficulty: 65,536 (static)
Work restart delay: 2.553s
Current restart penalty: 1.000
Minimum network difficulty: 50
2hr share count: 468
2hr avg hashrate: 271.41 MH/s
Since first share: 03:37:16
Mode: Pay-per-share
Merge mining restarts: dynamic

Yes, that's the MCU, and yes replacement would require an expert electronics technician removing and re-soldering, not something you'd take on yourself without experience I think.

Resolved last week. Got replacement specs from Inno, ordered from ebay and it's back and running.

You can use a 3 pin fan, take the old 2 pin plug, cut the third cable (which is for controlling the fan speed) and just mould the cables together.

EXACTLY!  Dumping their problems on the consumer does not fly!

B3 being fixed is still a question mark also.

I would also like to see these miners actually hash at the advertised rate.  On the pool side!  Not just what the miner reports.

Ideally, they should trade in defective B1/B2 gear for B3 (assuming it's reallyl "fixed").

If they are talking about removing chips from the board then Inno is out of their minds.  They can send replacement boards, but I am certainly not pulling out the old soldering gun on these things...  Not GONNA HAPPEN.  They need to own this and replace the boards if that is the case that the chip needs to be removed and replaced.  That is their warranty issue, not my issue.

I hope that is not what they are expecting.  We need some clarification fast.

I would strongly suggest that Inno contract with Lightfoot for the warranty repairs.  They should be reaching out to him now to see if they can enlist his services.  This is a HUGE BLACK EYE for Inno if they are going to push this problem off on the consumer.