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MineCoast
Premium
join:2004-10-06
127.0.0.1

Power Usage?

I currently an using an old computer for a pFsense router since I need site-to-site VPN with another location that is also running pFsense. The system I am using now is:

dell dimension 2400
intel celeron 2.53 ghz
640mb ddr memory
40gb ide hdd
2x optical media drives
onboard everything except one additional installed pci nic

The system does the job, it's quite, and I already have it. However, I am a bit concerned about the power usage. I hear horror stories of the old P4's/Celeron's using a massive amount of power.

Would I be better build a very low end atom system with a tiny ssd drive? How large of a power difference will there be?


FizzyMyNizzy

join:2004-05-29
New York, NY
I wouldn't worry about it.

But the newer stuff, does run A LOT more faster than that celeron. i5-3570k is 77w, that celeron is 73w. But the i5 run so much more faster.


MineCoast
Premium
join:2004-10-06
127.0.0.1
said by FizzyMyNizzy:

I wouldn't worry about it.

But the newer stuff, does run A LOT more faster than that celeron. i5-3570k is 77w, that celeron is 73w. But the i5 run so much more faster.

That's true, but the current system is much more than I need. The CPU usage is always under 10%, it's very lightweight work it's doing, mostly just NAT, Firewall, and VPN. The pFSense box it's actually connecting to for the site-to-site tunnel is actually running in a VM simply because of the low amount of resources it uses.


FizzyMyNizzy

join:2004-05-29
New York, NY
So yea, no point of getting a new system.

n_w95482
Premium
join:2005-08-03
Ukiah, CA
reply to MineCoast
I'm guessing it's using well under 100w with that load. I tested my dad's old Dimension 4600 a while ago (P4 2.6, 1.5 GB RAM, Radeon 9250, stock PSU), and it idled at 63w according to my Kill-A-Watt meter.

An Atom machine would use less power, but the cost of building it would greatly outweigh the power savings.
--
KI6RIT


MineCoast
Premium
join:2004-10-06
127.0.0.1
said by n_w95482:

I'm guessing it's using well under 100w with that load. I tested my dad's old Dimension 4600 a while ago (P4 2.6, 1.5 GB RAM, Radeon 9250, stock PSU), and it idled at 63w according to my Kill-A-Watt meter.

An Atom machine would use less power, but the cost of building it would greatly outweigh the power savings.

Nice. That's a huge relief then. I don't have a kill-a-watt meter (been wanting to get one) so your post greatly helped

JoelC707
Premium
join:2002-07-09
Lanett, AL
kudos:5
reply to MineCoast
Optiplex GX150 - 45-50W (GKCC011 - P3 1.0)
Optiplex GX280 - 80W (D4YJG61 - Celeron D 2.53)
Optiplex GX260 - 45-65W (FKC8T11 - P4 2.0)
Precision 360 - 115-130W (9754N51 - P4 2.8)
Dimension 8200 - 85-110W (F9K0C11 - P4 1.8)

These are all the Dell desktops I have. Well, I have two more, one is a Precision 690 that's in use (so I can't stick the meter on it right now but I can tell you it pulls about 3-4 amps at full load lol), and a Dimension XPS R450 with an even older PII CPU that probably isn't that useful for comparison.

Out of mine, the Optiplex GX280 is likely the closest in comparison as it has an apparently identical CPU but the slightly older P4 version below it is lower in power usage. Not sure what's up with that.

You could build an Atom or similar system that will sip power but the real question is the ROI. How long will it take for the power savings to show up? If you have a high kWh charge, it could be pretty quick but you would need to check your own power bill to really know.

My better suggestion would be to stick it in a VM at home but from what I know of your network, you don't have and don't need a VM host at home so that suggestion doesn't really work either. This is one of those damned if you do and damned if you don't situations.

n_w95482
Premium
join:2005-08-03
Ukiah, CA
The Celeron D is a Prescott core, the 2 GHz P4 is a Northwood A (A= 400 MHz FSB, B=533 MHz FSB, C=800 MHz FSB, HT on all models). Northwoods use less power and generate less heat than an equivalently-clocked Prescott.

The Dimension 2400 uses an older board/chipset that doesn't support Prescott CPUs. Only plain Celerons or P4 Northwood A/B CPUs will work in it. From a power consumption perspective, that's a good thing .
--
KI6RIT

JoelC707
Premium
join:2002-07-09
Lanett, AL
kudos:5
Ahhh good point, I forgot about the core differences. The Dimension 8200 is the oddball there as it's the only one that uses Rambus which IIRC used more power and ran hotter. So that means his system should be closer to the GX260 I tested.

n_w95482
Premium
join:2005-08-03
Ukiah, CA
Interesting, I didn't know how much power a Rambus+Willamette PC would use. There's still a few of them deployed where I work (11 years and still going!).
--
KI6RIT