Re: power connectors for mainboards
ron minnich wrote: I need something that comes in at ca. $25 ... Perhaps a high end 450W power supply (cost divided by 4) with a custom "Y" cable from a cable maker. In quantity the cables might be cheap enough. Someone will have to calculate a power budget for each voltage. It would be best to also measure an actual system's current draw on each rail, under full load to verify. You would probably require several hundred (4 board) systems to justify the initial design costs. Jeremy ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
On 22 Jun 2003, Justin Cormack wrote: > Sun Power (www.sunpower.com) will make up power supplies with custom ah. sunpower.com.tw ron ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
On 22 Jun 2003, Justin Cormack wrote: > Sun Power (www.sunpower.com) will make up power supplies with custom I think that's the wrong URL? get's me some technology company with refrigeration or something. ron ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
On Fri, 2003-06-20 at 15:40, ron minnich wrote: > > I have four K7SEMs which I would like to run from one PC power supply. > > Does anyone know if there are off-the-shelf cables available to do this > type of thing? Essentially a "Y" connector for the mainboard power > connector. Sun Power (www.sunpower.com) will make up power supplies with custom connectors (extremely quickly). You could ask them to make one up with 4 ATX connectors on (modulo sorting out the power on lines). Their PSUs are pretty good, I reckon you might get away with 600W for 4 Durons, maybe a little more. Justin ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re[2]: power connectors for mainboards
Hello Ron! Friday, June 20, 2003, 7:06:07 PM, you wrote: rm> Now I need to find four cheap, compact power supplies :-) rm> no disk in this system, no cdrom, no nothing save for motherboards. I'm rm> looking for small, cheap, good supplies. Probably don't exist but anybody rm> know for sure? I'd go for In-Win (Powerman) power supplies. They go for about US$15-20 here in Russia. The best supplies and the best cases too, IMHO. Check your local In-Win dealer for availability and prices. See http://www.in-win.com.tw/home/english/power_supply.htm or just www.in-win.com With best regards, Alexander mailto:[EMAIL PROTECTED] ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
On Fri, 20 Jun 2003, Peter Fedorow wrote: > How many quad output power supplies do you expect to need? not sure, possibly 30 to start. ron ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
I also have a need for multicomputer (motherboard only) ATX power supplies. Chances are we aren't the only ones, so perhaps it wouldn't hurt to suggest such a product to a high quality power supply manufacturer? My requirements don't necessitate the motherboard being able to turn off it's power. Within the next 6 months I expect to need: 20-60 units : At up to $30 / computer When I have the budget approved for them I'm thinking of contacting PC Power and Cooling to see if they're interested. Their Turbo-Cool 425 ATX/ATX12V in 12-31 units is on sale for $125.74 each right now, and its rated at: +5V @ 40A +12V @ 20A -5V @ .3A -12V @ 1A +3.3v @ 40A +5VSB @ 2A (With +5 and +3.3 combined < 300W) They're very conservatively rated power supplies, and I've never had one fail, (even in the most brutal environment I know of on computers schools.) The only power output limitation I see for the purpose is the 5VSB power. Some NICs (particularly Gigabit, and older 100 Mbs ones,) draw more than that for the WOL. But as the computers are diskless I don't have a need for that feature. How many quad output power supplies do you expect to need? ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
ron minnich wrote: What CPU is it and how much current does it need on the rails? Duron 1300 Looks like a 1300 needs a little over 60 watts peak. So if one of those 70 watt micro ATX supplys can do 19 amps on the 3.3V rail it might work. Depnds on how much juice the northbridge needs. -- Richard A. Smith [EMAIL PROTECTED] ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
ron minnich wrote: The one supply I found from Sparkle was $155! $9 - $16 350W - 550W http://www.str8buy.com/powersupplyups.html 250W Sparkle $11, 350W Powmax $15 http://3btech.net/cases2.html -Bari ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
RE: power connectors for mainboards
Thanks Alex. I am trying to find a way to build these low-cost for educational and tutorial uses. Anything custom is pretty much out. But thanks for the idea. ron ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
These appear to be some small, dirt cheap supplies. Not 100% sure a FlexATX power supply uses the same standard ATX power connector, but i suspect it does. http://www.aaronix.com/catalog/default.php/cPath/131_132 On Fri, 20 Jun 2003, ron minnich wrote: > On Fri, 20 Jun 2003, Richard Smith wrote: > > > What CPU is it and how much current does it need on the rails? > > Duron 1300 > > The one supply I found from Sparkle was $155! > > ron > > ___ > Linuxbios mailing list > [EMAIL PROTECTED] > http://www.clustermatic.org/mailman/listinfo/linuxbios > ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
On Fri, 20 Jun 2003, Richard Smith wrote: > What CPU is it and how much current does it need on the rails? Duron 1300 The one supply I found from Sparkle was $155! ron ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
ron minnich wrote: Now I need to find four cheap, compact power supplies :-) no disk in this system, no cdrom, no nothing save for motherboards. I'm looking for small, cheap, good supplies. Probably don't exist but anybody know for sure? Take a look at http://www.sparklepower.com/ They tend to run in the $10 -$15 ea range. -Bari ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
I need something that comes in at ca. $25 ... ron ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
Ron, How about 4 of these... http://www.seanm.ca/eden/psu.html Or if that's not enough power for the processor, sparkle (great name) makes some 150W powersupplies which are 1U and smaller than average 1U power supplies. FSP150-50PL is the model I have been using for pIII rackmount systems. Their website is www.sparklepower.com. Brian G Rhodes [EMAIL PROTECTED] [EMAIL PROTECTED] +1 612-741-1191 On Fri, 20 Jun 2003, Adam Sulmicki wrote: > > > I would advise against doing this. > > > I wouldn't know where to get an Y connector like that. > > > > ok, that's good to know. > > > > Now I need to find four cheap, compact power supplies :-) > > > > no disk in this system, no cdrom, no nothing save for motherboards. I'm > > looking for small, cheap, good supplies. Probably don't exist but anybody > > know for sure? > > Maybe try one of those 1U power supplies. > Similar to the one I had with me during USENIX > Something like: > > http://www.gtweb.net/ps-1u.html > > and the power supply in action: > > http://www.eax.com/usenix03/image/101_0138.JPG > > http://www.eax.com/usenix03/ > > It should be fairly easy to stack 4 of them side by side and tie together. > > -- > Adam Sulmicki > http://www.eax.comThe Supreme Headquarters of the 32 bit registers > > ___ > Linuxbios mailing list > [EMAIL PROTECTED] > http://www.clustermatic.org/mailman/listinfo/linuxbios > ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
ron minnich wrote: I would advise against doing this. I wouldn't know where to get an Y connector like that. Ditto. Just a couple of days ago we had this new nifty 2Ghz Athlon motherboard that wouldn't boot beacuse the 350W powersupply we had connected to it didn't have enough juice on the 3.3V rail. AMD white paper claims that the power supply must be able to provide peak CPU draw for 10 seconds at boot. These new processors need lots of juice when they startup. You would need a pretty hoss supply to boot 4 cpus at once. Now I need to find four cheap, compact power supplies :-) no disk in this system, no cdrom, no nothing save for motherboards. I'm What CPU is it and how much current does it need on the rails? You might be able to get by with some of those Mini-ATX supplys. They are small and cheap but pretty thin on wattage. -- Richard A. Smith [EMAIL PROTECTED] ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
> > I would advise against doing this. > > I wouldn't know where to get an Y connector like that. > > ok, that's good to know. > > Now I need to find four cheap, compact power supplies :-) > > no disk in this system, no cdrom, no nothing save for motherboards. I'm > looking for small, cheap, good supplies. Probably don't exist but anybody > know for sure? Maybe try one of those 1U power supplies. Similar to the one I had with me during USENIX Something like: http://www.gtweb.net/ps-1u.html and the power supply in action: http://www.eax.com/usenix03/image/101_0138.JPG http://www.eax.com/usenix03/ It should be fairly easy to stack 4 of them side by side and tie together. -- Adam Sulmicki http://www.eax.com The Supreme Headquarters of the 32 bit registers ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
ron minnich wrote: Now I need to find four cheap, compact power supplies :-) Maybe buy.com: http://www.buy.com/retail/product.asp?sku=10254765&hdwt=0&loc=101 I would carefully check the mobo current requirements; you might get away with one of the tiny ones: http://www.buy.com/retail/product.asp?sku=10272555&hdwt=0&loc=101 But it would be necessary to compare specs, startech web site says DC OUTPUT: * +3.3(8A) * +5V(14A) * +12V(5.5A) * -12V(0.3A) * +5VSB(1A) But the bottom line sometimes is you have to try it, since surge currents on startup can cause the supply to trip even though it can handle the steady load. -Steve ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
ron minnich wrote: I have four K7SEMs which I would like to run from one PC power supply. Does anyone know if there are off-the-shelf cables available to do this type of thing? Essentially a "Y" connector for the mainboard power connector. I've never seen any for ATX power supplies since you'd have to deal with a couple control signals. ATX supply has a PWR_OK ouput and also PS_ON# input. "PWR_OK is a “power good” signal. It should be asserted high by the power supply to indicate that the +12 VDC, +5VDC, and +3.3VDC outputs are above the undervoltage thresholds. Conversely, PWR_OK should be de-asserted to a low state when any of the +12 VDC, +5 VDC, or +3.3 VDC output voltages falls below its undervoltage threshold, or when mains power has been removed for a time sufficiently long such that power supply operation cannot be guaranteed beyond the power-down warning time." "PS_ON# is an active-low, TTL-compatible signal that allows a motherboard to remotely control the power supply in conjunction with features such as soft on/off, Wake on LAN † , or wake-on-modem. When PS_ON# is pulled to TTL low, the power supply should turn on the five main DC output rails: +12VDC, +5VDC, +3.3VDC, -5VDC, and -12VDC. When PS_ON# is pulled to TTL high or open-circuited, the DC output rails should not deliver current and should be held at zero potential with respect to ground. PS_ON# has no effect on the +5VSB output, which is always enabled whenever the AC power is present. The power supply shall provide an internal pull-up to TTL high. The power supply shall also provide debounce circuitry on PS_ON# to prevent it from oscillating on/off at startup when activated by a mechanical switch. The DC output enable circuitry must be SELV-compliant. The power supply shall not latch into a shutdown state when PS_ON# is driven active by pulses between 10ms to 100ms during the decay of the power rails." PS_ON# could just be pulled low with a jumper or switch to ground if you didn't care about power control by the motherboard since the ATX supply would be always on. -Bari ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
On Fri, Jun 20, 2003 at 05:10:01PM +0200, Vincent Touquet wrote: >>looking for small, cheap, good supplies. Probably don't exist but anybody >>know for sure? >but I think any 350W supply would do. Don't think you can go Any is an over statement of course, make sure the connectors match :) Sometimes the connectors even change during the life cycle of one and the same boardname. v ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
On Fri, Jun 20, 2003 at 09:06:07AM -0600, ron minnich wrote: >ok, that's good to know. >Now I need to find four cheap, compact power supplies :-) :) >no disk in this system, no cdrom, no nothing save for motherboards. I'm >looking for small, cheap, good supplies. Probably don't exist but anybody >know for sure? I don't know for sure what the requirements are for the K7SEM, but I think any 350W supply would do. Don't think you can go any lower than that (if it were an MP board, you would need a 450 W supply). Shop around :) v ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
On Fri, 20 Jun 2003, Vincent Touquet wrote: > I would advise against doing this. > I wouldn't know where to get an Y connector like that. ok, that's good to know. Now I need to find four cheap, compact power supplies :-) no disk in this system, no cdrom, no nothing save for motherboards. I'm looking for small, cheap, good supplies. Probably don't exist but anybody know for sure? ron ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
Re: power connectors for mainboards
On Fri, Jun 20, 2003 at 08:40:18AM -0600, ron minnich wrote: > >I have four K7SEMs which I would like to run from one PC power supply. >Does anyone know if there are off-the-shelf cables available to do this >type of thing? Essentially a "Y" connector for the mainboard power >connector. I don't think the power supply can handle four K7SEMs, they are designed for one ... I would advise against doing this. I wouldn't know where to get an Y connector like that. v ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
power connectors for mainboards
I have four K7SEMs which I would like to run from one PC power supply. Does anyone know if there are off-the-shelf cables available to do this type of thing? Essentially a "Y" connector for the mainboard power connector. ron ___ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
