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Author Topic: Bitmain Announces the Antminer R4 and APW5 Power Supply, Designed for Silence  (Read 67549 times)
leowonderful
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May 14, 2018, 08:44:30 PM
 #861

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.

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chadl2
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May 18, 2018, 06:27:56 AM
 #862

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.
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June 21, 2018, 03:08:30 PM
 #863

Are there some still available?
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June 21, 2018, 03:26:13 PM
 #864

^^ 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.

For bitcoin to succeed the community must police itself - Joshua Zipkin aka Joshua Alexander leaked AMT A1 miner skype chats
How a miner mfgr SHOULD operate: HaggsFIN trip to Canaan My info useful? Donations welcome! 1Fuzzyk398kDWVjuC5qPX5v6CjSkvbgAbd
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sarcheer
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June 21, 2018, 05:23:05 PM
 #865

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...

Miners:
DragonMint T1 x 3, Innosilicon T2T, R4 x 2, Avalon 821 x 6, Avalon 741 x 16, Innosilicon A4+, L3+ x 3
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June 24, 2018, 02:32:00 AM
 #866

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
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August 21, 2018, 11:53:06 PM
 #867

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.
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August 22, 2018, 10:24:55 AM
 #868

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.
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August 23, 2018, 12:11:02 AM
 #869

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.

I use a overkill EVGA 1300W Gold P/S.
R4 burned couple of cable sets already.
Next repair I solder my cable directly  Roll Eyes

Down clocked by haft , still feel they are fire hazard.
Don't buy.
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August 23, 2018, 01:26:07 AM
 #870

Might still be sagging, esp if there are multiple +12 rails and they are not distributed evenly. Try checking the voltage at the miner's plug (from the back) and see if it's 12 or 11 or whatnot.

They shouldn't burn up that badly. Hm.
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August 30, 2018, 01:43:24 AM
 #871

Yeah, there's definitely something not right if you're burning up cables on an R4.  I personally use the "RAID" configuration when it comes to PSU's powering miners, in that I buy multiple lower wattage PSU's to power up the boards and controller.  For example, my home droid Artoo (an Antminer R4 Batch 2) is powered by two Thermaltake 750W ATX PSU's.  They're cheap, give me more than enough power, and for those of you who might say I'm over-spec'ing the PSU's take note of the the efficiency curves and how the sweet spot is around 60% of max output... Cool
As a side note, I (finally) updated the firmware on Artoo due to a hashboard dropping out often enough and so far it runs with better board temp differentials. We'll see if R4 becomes R2 again, or if indeed it's better.
Now if only the mines on ice planet Hoth would open up again I'll be a happy miner.
Mine ON!  

Edit - Well that didn't take long, a board dropped out already and R4 became R2 again!  Tongue  Time to downclock.  Roll Eyes


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These aren't the Droids you're looking for: S5 & S7 (Sold), R4B2, R4B4 (RIP),S9-13.5 & S9r-11.5
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September 06, 2018, 12:44:25 AM
 #872

Ok, this is both weird and serendipitous! I did the old [your miner's IP address here]/cgi-bin/minerAdvanced.cgi trick to bring up the clock speed setting window and set it to start searching a bit below original, 537M.  It gave the "this will take 3 hours" warning and I went ahead and did it.  Only took the usual 10-20 minutes to boot up instead of a 3 hour tour as warned  Roll Eyes, and afterwards is now running a whole 1.6% faster instead of slower at 557M... Huh  You might think, as did I, that a faster clock would give even more problems. Turns out R4 has been running great the last week without dropping a board, and I must say I'm quite pleased to get my R4 back to normal!  Cool
Mine On!

I don't believe in superstition because it's bad luck
In Hotels, I prefer the 13thF1oor6CAwyzyxXPNnRvu3nhhYeqZdc
These aren't the Droids you're looking for: S5 & S7 (Sold), R4B2, R4B4 (RIP),S9-13.5 & S9r-11.5
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September 07, 2018, 02:15:44 AM
 #873

Did Bitmain ever release a 2nd (or Nth) batch of the R4?  It seems there was just that initial batch and... no mas.
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September 07, 2018, 02:30:41 AM
 #874

AFAIK they released a total of 6 batches. I have 2 of the batch 6's.

For bitcoin to succeed the community must police itself - Joshua Zipkin aka Joshua Alexander leaked AMT A1 miner skype chats
How a miner mfgr SHOULD operate: HaggsFIN trip to Canaan My info useful? Donations welcome! 1Fuzzyk398kDWVjuC5qPX5v6CjSkvbgAbd
-Support Sidehacks miner development. Donations to:   1BURGERAXHH6Yi6LRybRJK7ybEm5m5HwTr
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September 20, 2018, 09:34:58 AM
 #875

Hi!

Does anybody know where i can get hold of capacitors for the R4 hashboard?
Or can i take from a broken S7 hasboard?
HagssFIN
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September 20, 2018, 12:28:50 PM
 #876

Hi!

Does anybody know where i can get hold of capacitors for the R4 hashboard?
Or can i take from a broken S7 hasboard?

Hi,
I would have one faulty Antminer R4, for spare parts, in case you are interested.

PM me for more.



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September 20, 2018, 02:59:54 PM
 #877

Hi!

Does anybody know where i can get hold of capacitors for the R4 hashboard?
Or can i take from a broken S7 hasboard?

Hi,
I would have one faulty Antminer R4, for spare parts, in case you are interested.

PM me for more.




Looks like the capacitor is ok, but the soldering looks bad. Maybe been too hot.
Gonna try to replace the soldering.
Good to know that you have spares.
Kiitos.
HagssFIN
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September 20, 2018, 04:03:06 PM
 #878

Hi!

Does anybody know where i can get hold of capacitors for the R4 hashboard?
Or can i take from a broken S7 hasboard?

Hi,
I would have one faulty Antminer R4, for spare parts, in case you are interested.

PM me for more.




Looks like the capacitor is ok, but the soldering looks bad. Maybe been too hot.
Gonna try to replace the soldering.
Good to know that you have spares.
Kiitos.

No problem.

Eipä kestä.

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