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Colocated 2U Server under 1AMP

M

MrSmegzabush

Limp Gawd
Joined
Sep 21, 2004
Messages
434
This is not so much a power supply question, but a power usage question, I figured this would be the best place to ask. So I have recently decided to build my own machine to save some money hosting, and give myself more configuration options. The Server is basically a storage/web server and will be hosted by Oplink in Houston. Since this is my first collocated server I need some advice on how much machine I can build under 1AMP or 120Watts (at the plug) based on average usage, with the CPU running below 50pct most of the time. This is the limit set by the Hosting company, and I do not want to have to rebuild this machine when I am trying to put it in the rack and then find out I am averaging over 1Amp. Here is the Hardware I plan on Using

Case: SUPERMICRO CSE-822T-400LPB Black 2U Rackmount Server Case
CPU: Intel Xeon E3-1230 Sandy Bridge 3.2GHz LGA 1155 80W Quad-Core
Mobo:SUPERMICRO MBD-X9SCM-F-O LGA 1155 Intel C204 Micro ATX Intel Xeon E3 Server Motherboard
Memory: Kingston 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) ECC
HDD: I will have 2x1TB WD Black Drives, and (up to) 4x2TB or 3TB 5400RPM drives
Fans: may only run 2 or 3 of the 4 Fans in the case.

Like i said 120watts is the goal of what the machine should Average, not at Peak. So for a web-server, this will be mostly Idle, but I want to get as much machine as I can in there, so I do not have to mess with replacing it for several years, and do ya'll think this system will fall under this 120W margin?
 
In seek mode those drives would be pulling around 8W each, and considering a server use pattern in which they're all simultaneously in seek you're looking @ 50W for the drives(6 of them), at least 20W for mobo+ram and you're left with 50W for CPU and fans, which is a power envelope an E3-1230 will not fit in unless severely undervolted.

Short answer: no. :)
 
yea your not going to get that with a quad core machine. its going to cost $$$ to get it under that. your going to need an 80% gold powersupply probably SSD and dual core or mobile cpu maybe.

use something like this to get an idea of your load
http://extreme.outervision.com/PSUEngine
 
MrSmegzabush said:
Ya ive been using that to kind of figure out where I stand. I am not sure which Wattage I should be looking at. The Minimum or Recommended, which is closer to what its pulling at the plug.
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That calculator is not very accurate. Don't use it.
 
codegrinder said:
not for picking out powersupplys but it gives you a good idea to look at. nailed my machine dead on
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By mistake, it's actually a pretty poor way of calculating power requirements.. you're better off asking in forums like this or jonnyGURU than buying according to any online power calculator :)
 
I'm not sure why its a mistake? It adds up all the wattage of the components which is something you have to do anyways.

I don't see the harm in using as a guide line. I use that and add 20%

I just put in all the specs for the dell 755 that i have hooked up to the ups its recommended power supply is exactly what dell put in there and the minimum recommended is what its pulling from the wall.
 
codegrinder said:
I don't see the harm in using as a guide line. I use that and add 20%

I just put in all the specs for the dell 755 that i have hooked up to the ups its recommended power supply is exactly what dell put in there and the minimum recommended is what its pulling from the wall.
Click to expand...

^That's wrong:)
You added 20% to a system that is already supposed to be @ full load, which rarely happens unless you're running benchmarks for all your components at once.. factoring in efficiency after you take those wall numbers you'll end up with a ~60% PSU load which makes it too large for your rig.. it's not an issue, just more money spent on a PSU larger than what you need:)
 
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iconiK said:
Grab an E3-1260L and low-volt RAM.
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I like that Processor, I am having a bit of trouble finding ECC DDR3 under 1.5v though. So with a 45W CPU, 2 WD Blacks, 2 WD Greens, server and ram from above. What do you think that will put me at when idling?
 
MrSmegzabush said:
I like that Processor, I am having a bit of trouble finding ECC DDR3 under 1.5v though. So with a 45W CPU, 2 WD Blacks, 2 WD Greens, server and ram from above. What do you think that will put me at when idling?
Click to expand...
I'd estimate about 80-100W at idle.
 
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