Bitmain Announces the Antminer R4 and APW5 Power Supply, Designed for Silence - page 4.

lightfoot

legendary

Activity: 3164

Merit: 2258

I fix broken miners. And make holes in teeth :-)

Quote from: qctechno_isback on August 21, 2018, 06:53:06 PM

I changed twice my connectors on both R4 of mine. Still they overheat and need to be change again.
Look like only few pins take all the load, I suspect poor PCB layout. Don't purchase if you can't tinker with soldering.

What are you using for a power supply? If it is overloaded then voltage will sag below 12v and current draw will go up. Amps equals heat.

Also buy only nickel plugs, not the brass crap ones. Nickel is much better.

qctechno_isback

member

Activity: 91

Merit: 17

I changed twice my connectors on both R4 of mine. Still they overheat and need to be change again.
Look like only few pins take all the load, I suspect poor PCB layout. Don't purchase if you can't tinker with soldering.

lightfoot

legendary

Activity: 3164

Merit: 2258

I fix broken miners. And make holes in teeth :-)

Charred connectors are at least fixable (I can do that), the problem is overheating chips which causes the stupid boards to die. Replacing the chips is a pain in the rear, but if the connectors are bad it can be fixed with the right tools.

C

sarcheer

copper member

Activity: 330

Merit: 103

Definitely look out for R4's with charred 6-pin connectors. I've seen a couple being sold on eBay with burned up connectors as being in great condition...

NotFuzzyWarm

legendary

Activity: 3822

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Evil beware: We have waffles!

^^ Please READ the thread.....
The R4 has been out of production for well over a year and given their poor reliability, beware of any found on eBay or elsewhere.

chadl2

copper member

Activity: 53

Merit: 1

Cryptocurrency Miner in Los Angeles

Quote from: elokk on May 12, 2018, 07:43:26 PM

I owned a bunch of these over the past year and half, MyRig was able to successfully repair all of them that lost boards plus I did not have to ship the entire rig.

Currently trying to get a hashboard repaired there now but customer service is not replying promptly. Their customer service is hit or miss, must be all the smog in Denver Tongue

Good to know, just reached out to them on a couple boards I've had go bad.

I too think it's a shame the R4 isn't produced anymore. It's a great device for people who have access to inexpensive power in places where noise would be an issue. But I get that there's unlikely to be bulk buyers.

leowonderful

legendary

Activity: 1624

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Bitcoin FTW!

Quote from: elokk on May 12, 2018, 07:43:26 PM

I owned a bunch of these over the past year and half, MyRig was able to successfully repair all of them that lost boards plus I did not have to ship the entire rig.

Currently trying to get a hashboard repaired there now but customer service is not replying promptly. Their customer service is hit or miss, must be all the smog in Denver Tongue

I've noticed MyRig started to have some problems ever since they started migrating from Bitmainwarranty (and perhaps they're under load from Halong unit orders, etc). They're still a great company nevertheless and I'll continue to buy equipment from them, no matter what delays come up.

elokk

hero member

Activity: 723

Merit: 519

I owned a bunch of these over the past year and half, MyRig was able to successfully repair all of them that lost boards plus I did not have to ship the entire rig.

Currently trying to get a hashboard repaired there now but customer service is not replying promptly. Their customer service is hit or miss, must be all the smog in Denver Tongue

Pyrojason

copper member

Activity: 174

Merit: 10

Quote from: HagssFIN on May 12, 2018, 09:11:05 AM

I updated my post, please have another look.

Both two R4 units ended up being sent to MyRig,
and they were able to fix only one R4..

Got it, thanks. The R4 is so unique - it’s a shame there are so many issues.

HagssFIN

legendary

Activity: 2506

Merit: 1714

Electrical engineer. Mining since 2014.

I updated my post, please have another look.

Both two R4 units ended up being sent to MyRig,
and they were able to fix only one R4..

Pyrojason

copper member

Activity: 174

Merit: 10

Quote from: HagssFIN on May 12, 2018, 09:08:08 AM

Well I found out that,

Bitmain can not repair R4 miners. They say they don't have spare parts anymore.
Which sucks, in my opinion.

The only place to repair these is MyRig.

Gotcha - I saw that response from Bitmain - did they return it to you?

Has MyRig responded with any updates on the other board you shipped out?

HagssFIN

legendary

Activity: 2506

Merit: 1714

Electrical engineer. Mining since 2014.

Well I found out that,

Bitmain can not repair R4 miners. They say they don't have spare parts anymore.
Which sucks, in my opinion.

The only place to repair these is MyRig.
And they can only repair it if it doesn't have too much of a pcb board damages.

So out of these two R4 units, I was only able to get one R4 unit repaired successfully. Undecided

Pyrojason

copper member

Activity: 174

Merit: 10

Quote from: lightfoot on October 27, 2017, 07:08:23 AM

Quote from: qctechno on October 17, 2017, 06:25:45 PM

I had 1x R4B1 that have very cheap PCI power connectors.
They overheated at stock speed, ruined my P/S cables. ( EVGA G2 1300W )
My second unit didn't have that issue.

Monitor your cables temperature, nothing should heat.
Bitmain lowered connector quality for some R4 batch, probably explaining lot's of defects.

It need a lot's of heat to desoldering, soldering iron alone won't be enough.
Pre-heating bed or hot air is mandatory to execute the job properly.

Or you can send the boards to me for repair. I've been doing this on Avalons, Titans, and S7's for awhile now, and I've seen some poor attempts to do it which don't end well.

If you want me to fix bad connectors, drop me a PM and pack the boards in bubble wrap.

And since I believe information should be free and the skill of work be paid for, here are some tips on how to do it:

You have to get a pre-heater. Aoyue 853+ or better at minimum. Don't use a super big soldering iron, you will just burn the vias before you remove the part.

Cut the back three prongs on the connector before you start. That way you are removing them one at a time, not six at once.

And the super magic secret: Tin the leads with lead/rosin solder. This will lower the melting point of the crap ROHS solder a *lot* and make removal easier.

Use very good flux. Flux cleans connections and transfers heat.

Once off..../////

How do you pre-heat this area without letting the SMD components float off? The pcie joints seem really difficult to melt!

Pyrojason

copper member

Activity: 174

Merit: 10

Quote from: HagssFIN on February 12, 2018, 01:53:28 PM

Btw, I recently bought two faulty R4s in Ebay to see if I can fix them and after I noticed I'm not able to fix them with my equipment, I sent them to paid repair service (out-of-warranty repair service).

I have sent one R4 to Bitmain in Hong Kong and I have sent the another one R4 to MyRig in Denver, CO, USA.
In a e-mail discussion Bitmain said to me that "We have not produced or supported the R4 in a long time. If you need repair please try our out of repair agent in the US. They carry parts for older machines and may be able to repair. Please check with them."

I didn't know this prior sending one R4 unit to Bitmain in Hong Kong.

But I should have remembered that there was this whole replacement process with T9s and S9s for guys with a faulty R4 unit..

Let's see how this turns out. Cheesy

Any news on these two tests? Curious as to the progress or outcomes.
Any idea how much the CO repair center charges to repair/replace a single r4 board?

alikait

newbie

Activity: 51

Merit: 0

Quote from: elokk on April 19, 2018, 05:56:51 PM

Quote from: zachj00 on April 08, 2018, 07:38:24 PM

Does anybody know when the next batch of the R4s are coming out? It's been "coming soon" for what seems to be forever now.

I have 3 that I'm interested in selling or trading

how much do you want for them? i'm interested

PM me please.

elokk

hero member

Activity: 723

Merit: 519

Quote from: zachj00 on April 08, 2018, 07:38:24 PM

Does anybody know when the next batch of the R4s are coming out? It's been "coming soon" for what seems to be forever now.

I have 3 that I'm interested in selling or trading

throwaway2

jr. member

Activity: 41

Merit: 3

Quote from: Artemis3 on April 09, 2018, 01:49:43 AM

It is the same as running an older batch S9 with two boards (8THs), except silent. And they pull 2/3s the power of the older S9s as well.

Its design is probably unnecessary in a warehouse, but perfect for the living room.
The T9 is close, but it still uses dual fans. I wonder if the Avalons are quiet enough, but somehow doubt it. Someone told me 65db, which is 10db above the R4.

The fan on the R4 should be run at 100% by disconnecting the control wire, they are very quiet even at the max 3200rpm (i saw another (slower?) batch running max at 3000rpm).

Compare it with the useless A3 and tell me they were worth more spending resources than this. An Scrypt model using this same design would have probably been great as well.

I guess in the end you have to get a T9/S9 and put it inside a cooler box with holes and thermal insulated ducts...

I ran an Avalon 741 in my studio apartment for about 3 months and it heated my space pretty well for the winter months. The 841s are definitely louder.

Underclocking my 741 to -2 voltage and setting a low minimum fanspeed dropped the sound quite a bit (think ~50db @ 1 ft away, I will see if I can find a video). The fans are obviously very sensitive to temps and so I kept my unit near a cold brick wall with a window I could open at any time if it was getting too warm. Electricity cost was about the same as what I would have paid for heat.

fanatic26

hero member

Activity: 756

Merit: 560

The R4 was a failed experiment and further proves there is not a strong enough market for home miners to keep them in production.

To make a decent profit in the space now you need to run more miners than a normal home electrical system is setup to handle. The only reason to run an R4 is so you can pat yourself on the back and brag to your friends you mine bitcoin.

I mean an r4 makes like what $50 a month at residential power prices?

leowonderful

legendary

Activity: 1624

Merit: 1130

Bitcoin FTW!

Quote from: Artemis3 on April 09, 2018, 01:49:43 AM

It is the same as running an older batch S9 with two boards (8THs), except silent. And they pull 2/3s the power of the older S9s as well.

Its design is probably unnecessary in a warehouse, but perfect for the living room.
The T9 is close, but it still uses dual fans. I wonder if the Avalons are quiet enough, but somehow doubt it. Someone told me 65db, which is 10db above the R4.

The fan on the R4 should be run at 100% by disconnecting the control wire, they are very quiet even at the max 3200rpm (i saw another (slower?) batch running max at 3000rpm).

Compare it with the useless A3 and tell me they were worth more spending resources than this. An Scrypt model using this same design would have probably been great as well.

I guess in the end you have to get a T9/S9 and put it inside a cooler box with holes and thermal insulated ducts...

Avalons aren’t going to be quiet enough for the living room like you said; they’re still industrial grade machines just like the S9s, though they are indeed somewhat quieter than the S9s. Every decibel counts in home mining, though, so if you aren’t going for the living room approach, the Avalon or S9 is fine for the garage or basement as long as there is adequate airflow coming in and heat extraction out.

There’s no need for the R4 in a warehouse considering you get way better bang for your buck with alternatives like the S9, T9, A8xx, etc.

Artemis3

legendary

Activity: 2030

Merit: 1573

CLEAN non GPL infringing code made in Rust lang

It is the same as running an older batch S9 with two boards (8THs), except silent. And they pull 2/3s the power of the older S9s as well.

Its design is probably unnecessary in a warehouse, but perfect for the living room.
The T9 is close, but it still uses dual fans. I wonder if the Avalons are quiet enough, but somehow doubt it. Someone told me 65db, which is 10db above the R4.

The fan on the R4 should be run at 100% by disconnecting the control wire, they are very quiet even at the max 3200rpm (i saw another (slower?) batch running max at 3000rpm).

Compare it with the useless A3 and tell me they were worth more spending resources than this. An Scrypt model using this same design would have probably been great as well.

I guess in the end you have to get a T9/S9 and put it inside a cooler box with holes and thermal insulated ducts...

Topic: Bitmain Announces the Antminer R4 and APW5 Power Supply, Designed for Silence - page 4. (Read 85112 times)