_r2h
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January 20, 2014, 03:39:53 PM |
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I see the DPS-xxxxBB have no fans. How would one cool it, if it is even needed?
I was just going to stack two on top of each other, roughly the height and width of two 120mm fans.
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sidehack (OP)
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January 20, 2014, 03:46:22 PM |
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Probably going to put a pair of three-pin headers on the board, with a PWM speed adjust tied to both fans. As with the Z750 board, this'll have both manual control, and auto control from an external signal pin so you can implement temp sensors if you want.
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volosator
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January 20, 2014, 05:09:43 PM |
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Found it. This is what HP uses in DL580G5. Exact match. P/N number on my PSU is 438202-001 digikeyPM me for bounty
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joeventura
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January 20, 2014, 05:19:55 PM |
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I ordered one. 1440 Watts for $16 (with shipping) pretty small risk, nice payoff!
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sidehack (OP)
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January 20, 2014, 05:21:05 PM |
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I'm probably gonna use this guy since it's a right-angle connector.
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RickJamesBTC
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January 20, 2014, 06:18:29 PM |
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Don't mount your dps2000bb upside down. Board has to be on the bottom!! They just turn themselves off though, so that's good to know if a problem occurs. Damn these things work well! I've got each one running 10x r9-270x. I did have to do some rewiring for stability, the 5v line for the risers I sell should come from the computer controlling the cards. That lets them do a proper restart when they need to. I was trying to run them in bunches and it didn't work as well.
Someone asked about fans, I just put a little fan connector header on the side of the plug, and strap four fans to each bank of two psus. Zip ties, real ugly.
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mxz280
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January 21, 2014, 02:54:02 AM |
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I now run by DPS-1520AB Jupiter, fans are very quiet.
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BotwinBG
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January 21, 2014, 05:45:01 AM |
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I ordered one. 1440 Watts for $16 (with shipping) pretty small risk, nice payoff! Got 5 of those...at 140USD including shipping from the US to Scandinavia, why the heck not
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| AMEPAY | | | | | | ▄▄█████████▄▄ ▄█████████████████▄ ▄█████████████████████▄ ▄█████████▀▀▄▀▀█████████▄ ▄████████▄▄█▀ ▀█▄▄████████▄ ████████ ▀▀█▄██▀▀▄████████ ████████ █ ▄ █ ▄▀▀▄████████ ████████ █ █ █ ▄▀▀▄████████ ▀█████████▄█ █ ▄██████████▀ ▀████████ ▀▀▀ ████████▀ ▀█████████████████████▀ ▀█████████████████▀ ▀▀█████████▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ | │▌ | AMEPAY IEO
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| │ | | AMEPAY LISTING
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mxz280
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January 21, 2014, 06:44:27 AM |
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mxz280
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January 21, 2014, 07:07:05 AM |
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dps 2500bba two。
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mxz280
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January 21, 2014, 07:08:20 AM |
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sidehack (OP)
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January 23, 2014, 09:05:01 AM |
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Update - most of the parts to build a few hundred of the Z750P boards came in today. We assembled a few for initial testing; all the signal pins work as expected, as well as the 3.3V and 5V power outputs. I used a couple Cubes as test loads, one of which had some customized cards that pulled more power than usual. Here's the finished product, hooked up to two Cubes. The pigtail leads on the right are for the current sense signal. These two Cubes, one running at high clock and the other at even higher clock, collectively pulled about 101% power from a single supply. The current sense signal ranges 0-1.8V for 0-60A (the supplies are rated for 62.4A) so 1.887V equates 62.9A or 101% power. The tolerance on this measurement is about 5%. It ran at this level standalone for at least 15 minutes with no issues while I set up the next test. Here we demonstrate the load-balancing capability of these supply boards. The 12V busses are tied together, and current-share pins are linked on the header. One supply is sourcing 42.3A, the other 37A; the percent difference from mean current (39.7A) on each supply is about 6.5% in this configuration. Without the current share pins tied, one supply gave 46.3A and the other 33A, a difference from the mean of 17%. For this test we tied one supply's External On pin to the other supply's 5V output. The 5V is powered off the 12V rail, so it comes on with the main 12V power. Flipping on the main power on this supply automatically powered on the second supply as soon as its 5V was brought up, which was so immediate that I didn't notice a delay and the two supplies came on as one. The EON signal works reliably off 3.3V signals as well. I haven't tested below this voltage but the signal is rated for 3.3-12V without issue. The 5V supply should source 2A comfortably. These two boards have been running, averaging a 64% load, with zero problems for over four hours now. We're not taking orders yet, need to build up stock and get bobsag3 taken care of (since he paid down on an order, to get this project rolling he gets first dibs) but possibly sometime next week we'll have some stock to start selling.
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_r2h
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January 23, 2014, 09:20:12 AM |
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Outstanding work!
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freddyfarnsworth
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January 23, 2014, 09:22:56 AM |
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Inside of those powersupplys, is just amazing value, those huge caps will hold up on a 70% load for a second or so, maybe a tad longer, just like my PC with a good HX1050 in it when power blinks around here, cheaper PS's reboot not the HX. These are massive 400000MTBF Delta quality Powersupplies, without the $2000.00 price they were when made. Protected lab and bank data from fail, most were/are meant to be run redundant. Have built in failover ability. the 2000watt ones with the fans in the cases are Really Loud I mean screamin, have some 15k scsi arrays you cannot talk over the fan noise God I love this stuff, KUDOS for pathing the way for miners.
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BTC: 1F1X9dN2PRortYaDkq89YJDbQ72i3F5N3h MEOW: KAbvy9jrrajvN5WLo7RWBsYqYfJKyN9WLf DOGE: DAyKSrTiVeRZaReTu1Cyf5Je6qPdKTuKKE
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RickJamesBTC
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January 23, 2014, 09:31:04 AM |
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I may need to switch to power supplies with internal fans. I have four fans strapped to each pair of power supplies, and they still occasionally turn off from overheating I presume. It's annoying and I've had to spread the loads out a little. I don't want to spend more on fans than I'm spending on power supplies... What are some good ones with fans built in? I need at least 2000W per, 240v.
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sidehack (OP)
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January 23, 2014, 09:38:28 AM |
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The fans in these guys are pretty loud when left on full. These boards have a knob for manual speed adjustment, and the option for driving the fan from an external signal so you can rig up a load-based or thermostatic speed control. I haven't tried it, but in theory you could hook the external fan pin directly to the current sense pin, since high-speed for the fan would correspond with the 60A mark. Unfortunately the fan speed is not linear with voltage; it'll be at fairly low speed until you hit about 50A, which would still only be dissipating about 60W inside the supply so it might be okay. Wouldn't be very hard to rig up a simple op-amp circuit to scale the current measurement into an approximately linear fan speed signal.
I've also got parts on hand to start prototyping DPS-800 and DPS-2000 boards, so designs for those will be forthcoming. They should have compatible headers so hardware that works for one model's interface board should work with another, but that doesn't mean I recommend mixing and matching supplies in a single bank. Right now the main effort will be in manufacture of the first batch of these boards. We're also planning on developing a control board which can be linked to several (not sure, 6 to 12 probably) boards and handle them all together, with individual supply health indicators and power readings, as well as composite power output data. The backplane guys will probably like that.
Three of these Z750P load-linked will supply about 2200W and they're rated for 240V input. Just saying. Two of the DPS-800 would supply 2000W off 240V, and have internal fans.
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RickJamesBTC
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January 23, 2014, 11:09:13 AM |
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Not worried about loud, and I don't want to have to stack even more power supplies. I'm just finding that fans zip tied to the cases isn't providing sufficient cooling. I guess I'll need to get some much more powerful fans and maybe make some ducting to ensure the airflow all works as it needs.
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PMB
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January 23, 2014, 05:06:05 PM |
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Update - most of the parts to build a few hundred of the Z750P boards came in today. We assembled a few for initial testing; all the signal pins work as expected, as well as the 3.3V and 5V power outputs. I used a couple Cubes as test loads, one of which had some customized cards that pulled more power than usual. Here's the finished product, hooked up to two Cubes. The pigtail leads on the right are for the current sense signal. Hi, the PCB looks really nice! Keep up the good work! Do already have prices for these? regards, P.
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r00t$
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January 23, 2014, 05:23:07 PM |
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Nice work sidehack. I'm anxious to order a couple!
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