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Hello,
the 2880 breakout boards still available?
price for shipping to italy ?
(for 1x unit)
the 2880 breakout boards still available?
price for shipping to italy ?
(for 1x unit)
http://www.price-technology.com/ibm-bladecenter-2880w-breakout-board.html
Thank you! Both sides work. I have not been hacked like everyone else.
-Optim
Phil,
I appreciate the trust. If I remember correctly, you are using the gen 0 board which is the worst case scenario. Since then we have updated part of the layout and the dielectric compound to increase margins!
I have heard from a few source that some of the L3+'s can pull huge amounts of current from 1 or 2 pins within a small amount of time. I would error on the side of caution when using some less than ideal ASIC miners since fault protection cannot detect single pin current draw (that would be incredibly inneficient unless we were maintaining spacecraft or something as equally as critical).
Have you played with those at all?
-Optim
I appreciate the trust. If I remember correctly, you are using the gen 0 board which is the worst case scenario. Since then we have updated part of the layout and the dielectric compound to increase margins!
I have heard from a few source that some of the L3+'s can pull huge amounts of current from 1 or 2 pins within a small amount of time. I would error on the side of caution when using some less than ideal ASIC miners since fault protection cannot detect single pin current draw (that would be incredibly inneficient unless we were maintaining spacecraft or something as equally as critical).
Have you played with those at all?
-Optim
I am busy working on a PID control deployment, but I have a competent sales team (though sometimes dramatic) that could help you out.
http://www.price-technology.com/contact.html
-Optim
http://www.price-technology.com/contact.html
-Optim
Nice! That mine looks clean!
You should add the image to the post so we don't have to move to an external link.
How was set up time? I've been putting together a FAQ on our website to help hit all of the more obvious question related to powering GPU/ASIC mines.
Optim
You should add the image to the post so we don't have to move to an external link.
How was set up time? I've been putting together a FAQ on our website to help hit all of the more obvious question related to powering GPU/ASIC mines.
Optim
Images posted by newbies like me show up as a link instead of an actual image, as a way to stymie trolls, etc. If/when I've accumulated enough activity on the forum to no longer be classified a newbie, all my img-tagged images are supposed to transform from links into normal pics.
Setup of your equipment is a breeze, no problems. For those seeking guidance, I'd recommend attachment of both boards to the power supply first, then zip ties, then PCI-E cables with a support hand behind the board, then main power cable (not yet energized!) as a safe sequence. I can also imagine some people preferring to do PCI-E cables on the output board first, before even attaching it to the power supply. Some kind of plastic enclosure, as you mentioned you were working on in another thread, could be a nice enhancement if it ever works out. I'd certainly pick up some, as part of the Optimizer-approved package.
We have a prototype of the enclosure, but the manufacturers are as slow as molasses. If you know of a good shop for form/molded plastic, do tell. I will update this thread with pictures of the prototype enclosure in about a day.
Thank you for the feedback.
Nice! That mine looks clean!
You should add the image to the post so we don't have to move to an external link.
How was set up time? I've been putting together a FAQ on our website to help hit all of the more obvious question related to powering GPU/ASIC mines.
Optim
You should add the image to the post so we don't have to move to an external link.
How was set up time? I've been putting together a FAQ on our website to help hit all of the more obvious question related to powering GPU/ASIC mines.
Optim
Are these 2880 breakout boards still available?
Yes. We still make these.
Nice! That mine looks clean!
You should add the image to the post so we don't have to move to an external link.
How was set up time? I've been putting together a FAQ on our website to help hit all of the more obvious question related to powering GPU/ASIC mines.
Optim
You should add the image to the post so we don't have to move to an external link.
How was set up time? I've been putting together a FAQ on our website to help hit all of the more obvious question related to powering GPU/ASIC mines.
Optim
This is cool. I can't wait to see what it looks like with GPUs and some thermal profiles! ;-)
This is the safest implementation of the breakout board I have seen from a grounding perspective as well. Everything is coupled to chassis.
Nice work
-Optim
This is the safest implementation of the breakout board I have seen from a grounding perspective as well. Everything is coupled to chassis.
Nice work
-Optim
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?
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
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
That is the main reason we went with a custom solution for ourselves.
-Optim
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!
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
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)!
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.
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
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
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
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
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
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 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.
I don't recommend DPS1200 for L3+. Leastways I won't sell them to you if I know that's what you're using them on. The first five L3+ that came into my hosting, within a week three of them had set the PSU boards on fire. Looked like there was a flaw with the miner that caused potentially several hundred watts of additional power into one board, because every time the damage was centered around one pair of cables. The 1200 has about 500 watts of headroom over the L3+ stock power draw so it didn't trip overcurrent before the jacks started breaking down from the localized severe overcurrent draw. I could assume it's a flaw in the PCB, except that it happened to 3 of the exact same miner within seven days and not to any other of the same batch of boards, several of which I have powering S9/T9 off 1500W PSUs and they aren't even warm.
The owner of the miners said he saw similar trouble off pairs of Dell 750W, where one PSU would sometimes trip out (less headroom per supply). The L3+ are now driven off pairs of Seasonic 850W and I occasionally have to reset them.
My recommendation for the L3+, use no more than 1000W PSU and keep an eye on it.
My board works with the DPS800, which runs 800W on 120V and 1000W on 200+V, so that might be a viable option. I haven't tested it though.
But for safety I'm also not taking in more L3+ into hosting because I don't want my shop to burn down.
The owner of the miners said he saw similar trouble off pairs of Dell 750W, where one PSU would sometimes trip out (less headroom per supply). The L3+ are now driven off pairs of Seasonic 850W and I occasionally have to reset them.
My recommendation for the L3+, use no more than 1000W PSU and keep an eye on it.
My board works with the DPS800, which runs 800W on 120V and 1000W on 200+V, so that might be a viable option. I haven't tested it though.
But for safety I'm also not taking in more L3+ into hosting because I don't want my shop to burn down.
Aye, thanks for the additional info Sidehack.
By the way; by accident, I tested the DPS1600BB with my DPS2000BB, 2kW breakout. That is also a viable solution here since pinouts worked there.
-Optim
Looking for DPS-1200FB Breakout boards...
How many do you need? I played around with this design, but ultimately abandoned because the power was too low for our stuff?
-Optim
I could use 2 or 3 myself.
We are pretty busy but I could try developing those in time. While you wait, why don't you guys go for the DPS2000BB breakouts? I have a pretty large stock of those.
Also, cables are in Phil
-Optim
Looking for DPS-1200FB Breakout boards...
How many do you need? I played around with this design, but ultimately abandoned because the power was too low for our stuff.
-Optim