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Author Topic: Canaan vs. Bitmain PSUs test  (Read 302 times)
ccgllc
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May 06, 2018, 09:47:09 PM
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Hi all.  My data center is getting warm (air temp at the entrance to the miners is around 85F) and I was curious if one brand of miner PSU vs. the other was dealing with it any better.

Awhile back I ordered a https://www.amazon.com/DROK-Digital-Multimeter-Voltmeter-Ammeter/dp/B01MRZAFAF/ref=pd_sbs_469_1 thinking I could use it on one of my power panels, but it was way too light duty.  Instead I spiced it into a spare power cord and put the whole thing in a plastic wall box.  A few wire nuts and a bit of electrical tape later I had a fully functional "watt meter" for my power connections.

Originally I planned on using existing power supplies, one APW3++ and one Sorcerer.  For each test I allowed an Avalon 841 miner to fully spin up, measured by watching the power usage slowly climb until it was bouncing +/- a few watts.

Test 1:  APW3++ 1439.4 Watts, 6.29 Amps at 232.1 volts.
Test 2:  Sorcerer  1451.3 Watts, 6.33 Amps at 232.6 volts.

Then decided to unbox a new APW3++ and test it on the Test 2 miner, since the results were close, and we know individual miners vary a bit:

Test 3:  APW3++  1448.4 Watts, 6.32 Amps at 232.4 volts.

Good news... its appears the power supplies are, for all intents and purposes, equally efficient. 

The APW3++ has a higher rated temperature range, but past experience (especially at the low end), educated me to ignore those ratings by a wide margin.

I know this isn't exciting news, but figured others might be curious as well.

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May 06, 2018, 10:01:11 PM
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You should go read Phillip's review thread and realise that the Avalon 841 power consumption actually depends a lot on your temperatures,
rather than which brand power supply unit you use.
https://bitcointalk.org/index.php?topic=3375954.0

ccgllc
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May 06, 2018, 10:37:15 PM
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I've actually read through those earlier.  Its why I wanted to test using the same miner, at the same temperature.  I didn't catch that PSU brands were tested.

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May 06, 2018, 11:32:54 PM
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I've actually read through those earlier.  Its why I wanted to test using the same miner, at the same temperature.  I didn't catch that PSU brands were tested.

If you run an Avalon 841 in a room over 80f it burns more power.

I did most tests with the Corsair ax1500i

But I did test the delta 2400 watt and the hp 2450 watt

All of them. Run better when the room is at 67f

All of them run worse when the room is at 85f

I did test up to 91f with the 2400 watt delta and it pulled 1545 watts

I did test up to 100 f with the atx1500i. And it pulled about 1525 watts.

If you live in a seasonal place I am NJ. You will need to downclock or ac cool for 3-5 months and you will do very well for the cooler months

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July 20, 2018, 05:16:54 AM
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If you run an Avalon 841 in a room over 80f it burns more power.

I did most tests with the Corsair ax1500i

But I did test the delta 2400 watt and the hp 2450 watt

All of them. Run better when the room is at 67f

All of them run worse when the room is at 85f

I did test up to 91f with the 2400 watt delta and it pulled 1545 watts

I did test up to 100 f with the atx1500i. And it pulled about 1525 watts.

If you live in a seasonal place I am NJ. You will need to downclock or ac cool for 3-5 months and you will do very well for the cooler months

So the corsair are more efficient at higher temps? Makes sense for psu designed to mounted inside a desktop. Much larger intake fans on my evga 1600w than the antminer or other brands. Only draw back was $400 price tag when I bought them.

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