Topic: Hashing modules - BitSyncom - page 2. (Read 3590 times)
It's just a ATX PSU? It should be easy replacable no?
Ah you guys were right. I was looking at the at the wall numbers as the draw from the PSU numbers. My bad.
Jeff said his 3 module unit pulls 620W. Take away the 20W for the fans and controller, and you're looking at 200W for each module, not 166W. That means 6 modules is (6x200 + 20) 1220W. You could run that on a 1250W, but you'd be pushing the limits. You're either looking at a $300-400 PSU, or 2 750W PSUs.
Simple version. AC vs DC. I even included DC vs AC in my calculations. It helps to prevent errors like in your post above.
Measured at the wall = AC load.
Power supplies are rated on DC load.
Jeff said his 3 module unit pulls 620W. Take away the 20W for the fans and controller, and you're looking at 200W for each module, not 166W. That means 6 modules is (6x200 + 20) 1220W. You could run that on a 1250W, but you'd be pushing the limits. You're either looking at a $300-400 PSU, or 2 750W PSUs.
No. DeathAndTaxes is right. He took the 166W from my computation: https://bitcointalksearch.org/topic/m.1537338
Basically you fail to take into account the PSU efficiency. For example a 1000W PSU could power 6 modules (100% load), but if it is 82% efficient it would pull 1220W from the wall. All this without exceeding its ratings.
<-- Is hoping for a batch 2 Avalon with 6 module bays.
Where you gonna find a PSU that can power 6 modules? 166W per module + 20W for fans & controller.
6*166W + 20W ~= 1016W DC. Note the AC load will be higher but ATX PSU are rated by the DC wattage they can deliver not the AC load required to produce that DC load. A high end PSU like a SeaSonic X1250 (or possibly even X1050) should be able to drive it just fine.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151109
One should be looking for a good high quality brand, single massive 12V rail, and power distribution rating that allows ~100% load on 12V rail. Using some off brand, multi railed junk PSU is a good way to destroy it but SeaSonic 1250s worked fine for me pushing >1000W DC loads (quad 5970s rigs).
Someone running a multi-rig setup should really but running off a dedicated 30A 240V circuit. Good datacenter PDU with safe locking connector can be found on ebay (i.e. AP9571) so no reason not to do it right.
30A *80% derate * 240V = 5760W AC
1016W DC / 0.92 = 1116W AC * 5 = 5760W AC.
Five 6 module Avalon "could" be powered by a single 30A 240V circuit. 5KW is a lot of heat though so make plans accordingly.
Jeff said his 3 module unit pulls 620W. Take away the 20W for the fans and controller, and you're looking at 200W for each module, not 166W. That means 6 modules is (6x200 + 20) 1220W. You could run that on a 1250W, but you'd be pushing the limits. You're either looking at a $300-400 PSU, or 2 750W PSUs.
<-- Is hoping for a batch 2 Avalon with 6 module bays.
Where you gonna find a PSU that can power 6 modules? 166W per module + 20W for fans & controller.
6*166W + 20W ~= 1016W DC. Note the AC load will be higher but ATX PSU are rated by the DC wattage they can deliver not the AC load required to produce that DC load. A high end PSU like a SeaSonic X1250 (or possibly even X1050) should be able to drive it just fine.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151109
One should be looking for a good high quality brand, single massive 12V rail, and power distribution rating that allows ~100% load on 12V rail. Using some off brand, multi railed junk PSU is a good way to destroy it but SeaSonic 1250s worked fine for me pushing >1000W DC loads (quad 5970s rigs).
Someone running a multi-rig setup should really but running off a dedicated 30A 240V circuit. Good datacenter PDU with safe locking connector can be found on ebay (i.e. AP9571) so no reason not to do it right.
30A *80% derate * 240V = 5760W AC
1016W DC / 0.92 = 1116W AC * 5 = 5760W AC.
Five 6 module Avalon "could" be powered by a single 30A 240V circuit. 5KW is a lot of heat though so make plans accordingly.
<-- Is hoping for a batch 2 Avalon with 6 module bays.
Where you gonna find a PSU that can power 6 modules?
<-- Is hoping for a batch 2 Avalon with 6 module bays.
From another thread...
Based on the information provided above, the Avalon units are not equipped to handle a 4th hashing module out-of-the-box.
the units are 620W max, I mean the power supply shipped it's a 650 Antec, so buy UPS accordingly.
Based on the information provided above, the Avalon units are not equipped to handle a 4th hashing module out-of-the-box.
The Avalon PSU would be running only 3.5% over its rated capacity with 4 modules. Not great, but it should be able to run 24/7 at least 1 or 2 years at this workload, assuming it is a normal quality PSU rated to run at its full power. The 1- to 2-year lifetime can be derived from the typical 10k hour lifetime of a PSU's electronic components such as capacitors.
nghzang reported a 82% efficiency of the PSU and a 5-20 Watt power consumption for the fans. Therefore:
(620 (Watt at the wall) * .82 (efficiency) - ~10 (Watt for the fans)) / 3 (modules) = 166 Watt at 12V per module
A 4-module Avalon would consume:
166 (Watt per module) * 4 (modules) + 10 (Watt for the fans) = 674 Watt at 12V which is 3.5% higher than 650W
674 Watt at 12V (output) translates, given a .82 efficiency, to 822 Watt at the wall (input), but do not forget that a PSU wattage rating refers to its output power, not input power.
From another thread...
Based on the information provided above, the Avalon units are not equipped to handle a 4th hashing module out-of-the-box.
the units are 620W max, I mean the power supply shipped it's a 650 Antec, so buy UPS accordingly.
Based on the information provided above, the Avalon units are not equipped to handle a 4th hashing module out-of-the-box.
When will ordering open for the hashing modules?
Is a power supply upgrade required to power all 4 modules?
Is a power supply upgrade required to power all 4 modules?
see, same question.
I would put at least a 650watts powering the default 3 modules. So if the unit is upgrade ready, is it? thats 1 module more the psu must be at least 850watts.
If were my choice I would like to purchase without PSUs, bit cheaper, much lighter shipping that way and I could plan my upgrade path while using some ATX already have here. Would that void the warranty? I dont know.
When will ordering open for the hashing modules?
Is a power supply upgrade required to power all 4 modules?
Is a power supply upgrade required to power all 4 modules?
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