Custom Server Power Distribution Supply

[shovenose]

Re: Custom Server Power Distribution Supply

Okay, I got two power supplies Power One 12V 30A. My friend bought them for a Cienna switch that was missing the two power supplies, but they were not the correct ones. He needed the 48V variant.

I took one of them apart to check, it is a very good quality unit. They have a fan but are not annoyingly loud.

I purchased one of these to test:
http://www.ebay.com/itm/161270932210

And now I just nee something like this... Would this work?
http://www.ebay.com/itm/50pcs-x-2-1-...item336cab125c
I don't know the size of the jack on the Pico PSU, unfortunately. I am still in progres of coming up with the power supply board to distribute from the power supply to all of the computers since I have some odd 20 or 24pin or whatever connector off the PSUs. I'll post a pic in a bit.

[cheapie]

Re: Custom Server Power Distribution Supply

I don't know the size of the jack on the Pico PSU, unfortunately. I am still in progres of coming up with the power supply board to distribute from the power supply to all of the computers since I have some odd 20 or 24pin or whatever connector off the PSUs. I'll post a pic in a bit.

They're the same size as pretty much everything that uses 12V. Unfortunately, I don't know what size that is off the top of my head, and I don't have a suitable measuring instrument to measure mine.

[mariushm]

Re: Custom Server Power Distribution Supply

The connector for picoatx is most likely 2.5x5.5mm.

You'll have to be careful with those ebay connectors, they're generally rated for only a few amps, if your server uses 50-60 watts the connector may overheat or have too high resistance.
Also, buying those 50 connectors is basically a false economy.. you still need cable for those... a 30m spool of AWG18 cable is about 20$, or about $90 for 150 meters spool.. even if you use 2 x 1 meter wires, that still adds about 1$ to the price, making each connector+cable pair about 1.3-1.5$

You can buy connector with 6' (1.8m) awg24 cable for 1.7$ (50pcs) and it's molded, good connection etc etc .. awg24 is perfectly safe for up to 3-3.5a (about 35-50w): http://www.digikey.com/product-detai...2184-ND/568575

AWG18 assemblies are a bit more expensive at about 2.5$ each but those do about 6-8A without problems (well, as long as the resistance of the barrel connector itself isn't too high.

But I wouldn't worry too much about it, the picoatx psu itself seems to be using AWG20 for wires.

-
Those picoatx psus have pass-through for 12v, they only have 12v->5v and 12v->3.3v and -12v dc-dc converters on those tiny pcbs... you'll have to be careful as that picoatx will get HOT (70-90C).

[shovenose]

Re: Custom Server Power Distribution Supply

60 Watts!! Surely it will not use that much! I was thinking 1-2A... ? Even if I use a desktop hard drive. The J1900 CPU has a 10W TDP, there are no fans.

[goontron]

Re: Custom Server Power Distribution Supply

60 Watts!! Surely it will not use that much! I was thinking 1-2A... ? Even if I use a desktop hard drive. The J1900 CPU has a 10W TDP, there are no fans.

a desktop drive uses nearly an amp!

[dj_ricoh]

Re: Custom Server Power Distribution Supply

i taught i`ll never use this picture ever

it was in 2008 .
it was a big kick ass truck that ship the parts and it took me almost 8 weeks to install them.
pff i could talk all day how many problems i had to install them.

but the biggest problem was HEAT
after 2 days i took that pic i started one blade from each chassi to self test.

on the first day with those 4 blades ON we got a call at 3 am that those blades will burn the room.
We where like ... What the !$!@$!

The air cooling was standard and it did not manage to cool those blades.
what will have happen if i started all to do self test?
after 2 weeks they change it with a MALL Chiller and i had to put a jacket to go again in that room

I will rather buy space from a big firm to use server then to make mine .
My point of view

[shovenose]

Re: Custom Server Power Distribution Supply

I don't think it uses that much power. Maybe at spin up, but not all hard drives would spin up at once. Laptop drives would certainly use less power, but are slower and more expensive per capacity. I have attached a picture of my power supplies, as well as one of my dog - she loves whip cream!

[shovenose]

Re: Custom Server Power Distribution Supply

i taught i`ll never use this picture ever

it was in 2008 .
it was a big kick ass truck that ship the parts and it took me almost 8 weeks to install them.
pff i could talk all day how many problems i had to install them.

but the biggest problem was HEAT
after 2 days i took that pic i started one blade from each chassi to self test.

on the first day with those 4 blades ON we got a call at 3 am that those blades will burn the room.
We where like ... What the !$!@$!

The air cooling was standard and it did not manage to cool those blades.
what will have happen if i started all to do self test?
after 2 weeks they change it with a MALL Chiller and i had to put a jacket to go again in that room

I will rather buy space from a big firm to use server then to make mine .
My point of view

in 2008 servers had a lot worse performance per watt.
Besides, each server here was 10W TDP. Not two 100W CPUs, FB DIMM DDR2 RAM, and 15K hard drives.

[shovenose]

Re: Custom Server Power Distribution Supply

Okay, ordered a crappy 12V 6A adapter on Amazon because I want to test the motherboard first to make sure it runs Linux OK, and ordered the ASRock Q1900B-ITX from Newegg. As stuff gets here we will try it