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Power supply for a file server?

post #1 of 62
Thread Starter 
I've done all the online PSU calculators I can find and they all seem to be geared toward desktops. I've also searched this forum and all the threads I can find are for servers with much fewer drives.

The PSU must be able to power a server motherboard with:
* 4 sticks of ECC DDR2
* Intel 3200 server mobo
* 3 gigabit ethernet cards (1 is 2-port, 4 total GigE ports)
* Sound card
* 2 SATA controllers (2-port, non-raid Sil3132)
* 2 SATA Port Multipliers (Silicon Image, these take floppy power connectors but I could buy adapters or whatever)
* Onboard GPU is Matrox G200e Server GPU
* Core 2 Duo E7200 stock cooler, runs prime95 (actually mprime) when idle.

Future upgrades will stick to 1-socket, ECC RAM, server mobo type configurations. I am tempted to upgrade soon now that CPUs have AES acceleration.

The important part:
* 6 7200RPM 500GB HDDs
* 6 7200RPM 2TB HDDs
all mixed brands/models. Yes that's 12 HDDs. Planning on upgrading the 500GB hard drives to larger models.

Additionally the case has 5 92mm fans of the extra-thick extra-fast variety which can become very aggressive when threatened.

My #1 priority is stability and reliability. I am fine with getting an overpowered PSU if I need to in order to get the best reliability and stability.
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Cherry
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post #2 of 62
I would say a good reliable 500w or so should be more than enough and have enough headroom to run efficiently. A good 400w should even do.
Tiny Fun
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post #3 of 62
Thread Starter 
Quote:
Originally Posted by LemonSlice View Post
I would say a good reliable 500w or so should be more than enough and have enough headroom to run efficiently. A good 400w should even do.
You sure about that? I estimate spinning up the drives takes 2.8A * 12V * 12 drives = 403W. Just to start the drives.

Edit: Just went and pulled out a fan to see the label. They're big fat Deltas that take a half amp each. Thats another 5 fans * 0.5A * 12V = 30W. The CPU has a TDP of 65W and the northbridge 22W.

We're already up to 520W without cards or ram!

Edit 2: Only during boot though, so shouldnt be considered for efficiency reasons as it rarely boots. However, having it stable power for the first few seconds of operation would be pretty important I think. And no, I unfortunately don't have controllers that do staggered spinup.
Edited by Birthday Attack - 5/17/11 at 12:29am
Cherry
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post #4 of 62
ups->500w or 600w psu. Higher up the more headroom you have. Any gpus your going to add?
post #5 of 62
Quote:
Originally Posted by Birthday Attack View Post
You sure about that? I estimate spinning up the drives takes 2.8A * 12V * 12 drives = 403W. Just to start the drives.

Edit: Just went and pulled out a fan to see the label. They're big fat Deltas that take a half amp each. Thats another 5 fans * 0.5A * 12V = 30W. The CPU has a TDP of 65W and the northbridge 22W.

We're already up to 520W without cards or ram!

Edit 2: Only during boot though, so shouldnt be considered for efficiency reasons as it rarely boots. However, having it stable power for the first few seconds of operation would be pretty important I think. And no, I unfortunately don't have controllers that do staggered spinup.
You are using values when the devices are at their estimated. for the drives to full fill that scenario it will have to run full speed 24/7 all 12 of them. That will never happen. Just make sure you get a psu with a lot of connectors supporting your devices.
post #6 of 62
I'm not sure if a hard drive will draw even 400 watts during the spin up. On top of that, since the CPU is not actually performing any operations at that time the usage is also negligible. By the time the CPU starts consuming real power Windows must have been loaded and the hard drives definitely would have spun up by then. I will say though, since it is a server it would not be as pointless to overpower the PSU by a bit. 600W should be perfect. Also, all of the wattage measurements you are using are considering your system running at the absolute highest power consumption they can. This is not true 99% of the time.
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AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core 
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AMD Opteron 6176 SE 12-Core 2.3GHz AMD Opteron 6176 SE 12-Core 2.3GHz AMD Opteron 6176 SE 12-Core 2.3GHz AMD Opteron 6176 SE 12-Core 2.3GHz 
MotherboardGraphicsRAMHard Drive
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AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core 
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post #7 of 62
a decent 500watt psu should be sufficient to run that.
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post #8 of 62
Quote:
Originally Posted by Birthday Attack View Post
You sure about that? I estimate spinning up the drives takes 2.8A * 12V * 12 drives = 403W. Just to start the drives.
Lots of raid controllers support staggered spinup, and IIRC ALL enterprise drives do, for exactly this reason. You'll have to check on specific desktop sata drives, I don't know if some/all/certain models do or don't.

My 3ware cards are both set to 2s stagger on both of my 4 drive raid 5 arrays.
 
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post #9 of 62
I swear last time I looked at my hitatchi 2TB 7200rpm HDD's they only used like 0.5amps or something
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post #10 of 62
op do you have a rack mount? Now dunno but I notice we get to see a lot of psu reviews and psus for the desktop market but you won't find most of them in the server psu business. You can have a look here
http://www.mypccase.com/seposu.html
Dunno your setup completely but you can have a look to see if its in line what your looking for.
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