DPS2000BB Breakouts. New updates! | Bitcointalksearch.org

philipma1957

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Quote from: Optimizer on August 04, 2017, 04:04:22 PM

Quote from: philipma1957 on August 04, 2017, 03:04:59 PM

optimizer boards are beefy and no issues with them.

I was using both his and his competitor's 2000 4000 and 2800 watt boards.

I was a little careless with the competitors ibm 2880 breakout board and gave myself a 240 volt/30 amp circuit shock

Even with a one hand no grounding touch it still fucking hurt.

If I remember all of optimizers boards are resin coated to reduce shock risk correct?

Phil, we coat all solder joint with a conformal coat. On the high voltage leads, we use a potting compound with a dielectric strength greater than 800V/mil. I have received some negative feedback on the potting compound as 'ugly' and have noted said concerns (though on a personal level, looks are not a thing for me in industrial situations).

We are partnering with an extruder shop to make a plastic enclosure for the power input boards for mechanical strength and to prevent shock hazards.

Though I do need to give you some flak for this Phil! Never should anyone ever handle 240VAC systems while they are live and energized! That should be assumed, but I am stating this for everyone to know, so that such things are not repeated. YOU COULD DIE!

By the way, I am sitting on 1k of 6P to 6P and 6P to 6P+2Ps if y'all need.

-Optim

I know I got lucky it was 1 hand and I was not grounded. It is the 1 and only one time i ever did a 240 volt shock It was a lot different then a 120 volt.

Was not your gear. After this happened I altered it and covered it with a safety piece of non conductive pvc.

Something to keep in mind is that while a psu may be turned off the power plug attaching to the psu can be live so be careful .

Some breakout boards not optimizers have exposed 240 volt lines so even though the psu switch is off the power plug from your pdu would be live. thus you could be shocked.

At the moment I am fairly stock with power gear. But buysolar my solar array partner is look for spot to expand. maybe we will add 50kwatt 24 hour array to our 15kwatt 24 hour array allowing us to run 65 kwatt of mining gear 24/7/365

Optimizer

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Activity: 111

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Quote from: philipma1957 on August 04, 2017, 03:04:59 PM

optimizer boards are beefy and no issues with them.

I was using both his and his competitor's 2000 4000 and 2800 watt boards.

I was a little careless with the competitors ibm 2880 breakout board and gave myself a 240 volt/30 amp circuit shock

Even with a one hand no grounding touch it still fucking hurt.

If I remember all of optimizers boards are resin coated to reduce shock risk correct?

Phil, we coat all solder joint with a conformal coat. On the high voltage leads, we use a potting compound with a dielectric strength greater than 800V/mil. I have received some negative feedback on the potting compound as 'ugly' and have noted said concerns (though on a personal level, looks are not a thing for me in industrial situations).

We are partnering with an extruder shop to make a plastic enclosure for the power input boards for mechanical strength and to prevent shock hazards.

Though I do need to give you some flak for this Phil! Never should anyone ever handle 240VAC systems while they are live and energized! That should be assumed, but I am stating this for everyone to know, so that such things are not repeated. YOU COULD DIE!

By the way, I am sitting on 1k of 6P to 6P and 6P to 6P+2Ps if y'all need.

-Optim

philipma1957

legendary

Activity: 4256

Merit: 8551

'The right to privacy matters'

optimizer boards are beefy and no issues with them.

I was using both his and his competitor's 2000 4000 and 2800 watt boards.

I was a little careless with the competitors ibm 2880 breakout board and gave myself a 240 volt/30 amp circuit shock

Even with a one hand no grounding touch it still fucking hurt.

If I remember all of optimizers boards are resin coated to reduce shock risk correct?

Optimizer

member

Activity: 111

Merit: 10

The construction is radically different. We designed the back plane card based on experience we have had in power systems. The excess heating you see is inneficient, and that costs money in a miner.

That is the main reason we went with a custom solution for ourselves.

-Optim

fusion0389

sr. member

Activity: 324

Merit: 250

Quote from: soulistyce on August 03, 2017, 02:53:27 PM

hi, ive bought at almost 2 years 1 dps2000bb from jabberwock from france...
now after all this time and a crappy technobit hex4m miner the breackout board almost burned all the connectors...now im using it to my gpu rig but cant connect all plugs 4 are burned...ive read you sold them for 50usd but got to ask were do you ship from!!??
if from europe im interest on buy 1 brea\ckout board with cables soon to replace mine.
best regards

My experience is similar, The boards Optimizer sells "feel" higher quality. They are heavier and thicker.

usao

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Activity: 1109

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Quote from: Optimizer on August 03, 2017, 03:26:35 PM

Quote from: usao on August 03, 2017, 03:09:44 PM

BTW, still looking for a breakout board for the HP DPS-1200FB

There is a proto for this in manufacturing. Would you like to be a tester of sorts?? It is still about a month out in testing though!

Sure that would be great.

Optimizer

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Activity: 111

Merit: 10

Quote from: usao on August 03, 2017, 03:09:44 PM

BTW, still looking for a breakout board for the HP DPS-1200FB

There is a proto for this in manufacturing. Would you like to be a tester of sorts?? It is still about a month out in testing though!

Optimizer

member

Activity: 111

Merit: 10

Quote from: soulistyce on August 03, 2017, 02:53:27 PM

hi, ive bought at almost 2 years 1 dps2000bb from jabberwock from france...
now after all this time and a crappy technobit hex4m miner the breackout board almost burned all the connectors...now im using it to my gpu rig but cant connect all plugs 4 are burned...ive read you sold them for 50usd but got to ask were do you ship from!!??
if from europe im interest on buy 1 brea\ckout board with cables soon to replace mine.
best regards

We are US based (California)!

usao

legendary

Activity: 1109

Merit: 1000

BTW, still looking for a breakout board for the HP DPS-1200FB

soulistyce

hero member

Activity: 701

Merit: 511

hi, ive bought at almost 2 years 1 dps2000bb from jabberwock from france...
now after all this time and a crappy technobit hex4m miner the breackout board almost burned all the connectors...now im using it to my gpu rig but cant connect all plugs 4 are burned...ive read you sold them for 50usd but got to ask were do you ship from!!??
if from europe im interest on buy 1 brea\ckout board with cables soon to replace mine.
best regards

Optimizer

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Activity: 111

Merit: 10

Quote from: sidehack on July 20, 2017, 08:56:47 PM

I can send you one to play with if you like. But as mentioned, even miners pulling 1300W off a 1500W PSU have no trouble, no real temperature elevation even at the contact points. S7, S9 and T9 miners pulling enough power to trip current on the DPS1200 (which is why I shifted them up to 1500W), same. The L3+ could have been trying to pull an extra 500 watts through a single cable pair without killing the PSU and 700 watts through a single cable pair could definitely cause a fire even on a good board. The PSU would have been outputting at least 12.5 volts.

Say whatever you want about KNC. Those guys knew how to get away with selling overpriced fire hazards a year behind schedule.

In general I'd recommend, like Optimizer, to use an over-spec PSU for improved efficiency. But occasionally that over-spec can cause a fire hazard if something else goes wrong and the PSU's overhead keeps it from tripping out before catastrophe occurs.

If you want to send me one, I can run a power test to see what's going on. Though I am short on time for probably a month!

If the miner is defective, I would avoid any use.

-Optim

sidehack

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Curmudgeonly hardware guy

I can send you one to play with if you like. But as mentioned, even miners pulling 1300W off a 1500W PSU have no trouble, no real temperature elevation even at the contact points. S7, S9 and T9 miners pulling enough power to trip current on the DPS1200 (which is why I shifted them up to 1500W), same. The L3+ could have been trying to pull an extra 500 watts through a single cable pair without killing the PSU and 700 watts through a single cable pair could definitely cause a fire even on a good board. The PSU would have been outputting at least 12.5 volts.

Say whatever you want about KNC. Those guys knew how to get away with selling overpriced fire hazards a year behind schedule.

In general I'd recommend, like Optimizer, to use an over-spec PSU for improved efficiency. But occasionally that over-spec can cause a fire hazard if something else goes wrong and the PSU's overhead keeps it from tripping out before catastrophe occurs.

Optimizer

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Activity: 111

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I'm trying not to throw KNC under the bus. ;-)

Ummm. That's probably correct, though it would be interesting to see those transients on a scope plot. I am guessing your output voltage at the 12V stage sags and causes a runaway effect as I increases a few fold. Possibly the extra resistance in those boards is causing a high voltage drop.

-Optim

sidehack

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Curmudgeonly hardware guy

Seems unlikely, when there's problems on several different units of at least 3 different models of supply.

That's why I recommend using a PSU without as much trip-current overhead, and definitely not my boards on a PSU with more than 500W of overhead, especially not when three different boards on three different PSUs on three different L3+ caught fire.

Maybe heavier copper on Optimizer's boards would hold up to the localized surge currents better, but that just means the cables would fail next if the fault condition isn't fixed.

Optimizer

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Ah, I normally only run GPU. They are nice and generally error free

If the L3 is shunting out on you, I would not use it without some kind of power limiter or reset-able fuse that is temp triggered (AC Input side).

It is possible in frequency hops to produce pretty large transients. Are you sure the problem isn't with a particular supply output?

-Optim

usao

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Quote from: Optimizer on July 20, 2017, 11:08:43 AM

I am unsure, but if Sidehack says it worked for him, it is possible. In my experience though, you want to load these supplies around 50-60% for peak efficiency.

-Optim

I think his issue was that the PSU was not cutting-off if the miner drew too much power, so he recommended having the PSU much closer to the 80% mark to make sure that if there was a power surge in the miner that the PSU would cut out and not cause any smoke/fire issues on the L3+.
In either event, im probably better off using my Seasonic 1000W PSU, that would be 80%. I don't have anything as low as an 850, but that would be like 95% anyhow, probably also not good.

Optimizer

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I am unsure, but if Sidehack says it worked for him, it is possible. In my experience though, you want to load these supplies around 50-60% for peak efficiency.

-Optim

usao

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Quote from: Optimizer on July 20, 2017, 08:45:57 AM

Quote from: usao on July 20, 2017, 08:31:41 AM

I could use a pair of Seasonic X1000's that I have, but I also have 4x of the DPS-1200's from an old HP DL580 just sitting around.
I also have a pair of DPS-700GB PSU's from a HP DL360. These would be under-rated since the L3+ Draw is rated at 800W.
I was told by others to get a PSU rated at least 20% higher than the load.

I would say ideally 50-80% for efficiency on these server supplies (full bridge topology). You should invest in a DPS1600 or greater.

Confused... Sidehack just recommended <= 1KW max due to fire issues when PSU doesn't shutdown on overdraw...

Also, 66% of 1200W is 792, right at the 800W mark for the L3+...

Optimizer

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Quote from: usao on July 20, 2017, 08:31:41 AM

I could use a pair of Seasonic X1000's that I have, but I also have 4x of the DPS-1200's from an old HP DL580 just sitting around.
I also have a pair of DPS-700GB PSU's from a HP DL360. These would be under-rated since the L3+ Draw is rated at 800W.
I was told by others to get a PSU rated at least 20% higher than the load.

I would say ideally 50-80% for efficiency on these server supplies (full bridge topology). You should invest in a DPS1600 or greater.

usao

legendary

Activity: 1109

Merit: 1000

I could use a pair of Seasonic X1000's that I have, but I also have 4x of the DPS-1200's from an old HP DL580 just sitting around.
I also have a pair of DPS-700GB PSU's from a HP DL360. These would be under-rated since the L3+ Draw is rated at 800W.
I was told by others to get a PSU rated at least 20% higher than the load.

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