Most supplies are more efficient running the higher voltage, yes, but they need to actually be 220/240v compatible. If you plug a 110/120v only unit into 22/240v ... well it'll probably be pretty, what with all the nice flashy sparkles but it won't do your system any good.
Almost all PC power supplies can do 240V. Just if you have a non-PFC unit you need to make sure to flip the switch on the back.
The Cardboard Master Crunch with us, the XS WCG team
Intel Core i7 2600k @ 4.5GHz, 16GB DDR3-1600, Radeon 7950 @ 1000/1250, Win 10 Pro x64
240VAC is cheaper to run...Remember...Power=Voltage x Current
i7-860 Farm with nVidia GPU's
yea but Power = Watts. and Watts is what the meter measures. the only thing the higher voltage does is lower the amps required.Originally Posted by DAK1640
Its not overkill if it works.
It is a PSU thing ....Most recent Psu's are more efficient when using 240v (I've seen comparative charts but I don't remember where) I seem to remember a figure of around 2%
W=I*V in dc circuits only, The power factor of an ac circuit will influence the efficiency
Last edited by OldChap; 03-06-2010 at 09:54 AM.
My Biggest Fear Is When I die, My Wife Sells All My Stuff For What I Told Her I Paid For It.79 SB threads and 32 IB Threads across 4 rigs 111 threads Crunching!!
Yeah, I kinda' figured that much.
I didn't realize there were non-PFC units without a switch on them.I have a couple really old 150 watt psu's with switches. Massive 5A on the 12V rail.
So, you've purchased new power cords for your 240vac compatible power supplies or replaced the plug ends with an appropriate end to fit one of these? (Actually, can the original 120vac cords even handle 240vac if you replaced the plug end? The one in my hand says 300V on it
I was asking in this context.
Edit: I probably should have started my own thread for this. Sorry. /Edit
Last edited by my87csx481; 03-06-2010 at 11:03 AM.
It is AMPS that spins that meter...
i7-860 Farm with nVidia GPU's
Don't most households already have 240v? Just look behind your stove. Chances are it's plugged into a 3-prong 240v terminal.
No... actually it is watts. You get billed by the kilowatt-hour.It is AMPS that spins that meter...
You can cut the amp draw in half by doubling volts (Power = Volts x Amps). The savings is not because of the amp draw being cut, but because things are a little more efficient at a higher voltage. You don't have quite as many losses from wire resistance and such.
If it was the same efficiency, you would gain nothing by going to 240V from 120V.
The Cardboard Master Crunch with us, the XS WCG team
Intel Core i7 2600k @ 4.5GHz, 16GB DDR3-1600, Radeon 7950 @ 1000/1250, Win 10 Pro x64
![Send a message via ICQ to =[PULSAR]=](images/misc/im_icq.gif)
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Its more like a pasture instead of a farm
Dual i7's @ 4.2ghz, 2x gtx295's need another PSU to add more gpus.
Sorry for derailing this thread. I knew I should have started a separate thread, or PMs.
Felt I should at least include a pic of my humble "farm".
Far left: E3110 dual core - gamer, sorry, I don't crunch with it
Middle: i7 920 - crunched for a week at 200 x 20, currently testing at 200 x 21 - latest addition
Right: Q9550 - 450 x 8.5 - been cranking away for ~7 months now
Not quite visible: dead P35 board - I think the NB is cooked - all components test good on another board, can't pass memtest no matter what on the P35, trying to decide if I even want to bother with RMA
so pulsar, if you get 8 friend to be your neighbour, you can grow your pasture by 2 feet square.
Most do have that switch. But I saw a PSU once that was just 120V only... granted it was a very cheap pile of crap and I doubt that any of us would run into one of those, but they exist.I didn't realize there were non-PFC units without a switch on them.
My comment was mostly a reminder about the little red switch on the non-PFC PSUs so that hopefully nobody would just plug one into 240V without switching it.
Yes they can, the insulation is more than enough to handle 240V.(Actually, can the original 120vac cords even handle 240vac if you replaced the plug end? The one in my hand says 300V on it
The Cardboard Master Crunch with us, the XS WCG team
Intel Core i7 2600k @ 4.5GHz, 16GB DDR3-1600, Radeon 7950 @ 1000/1250, Win 10 Pro x64
Thanks SparkyJJO for the clarifications.
Wait, can you just replace the plug end to get 240V? I am confused.
No, you need a different plug end so that it will fit in the 240v outlet. The plug itself does nothing special, it's just a different shape.
Checkout some of the farms in this thread at ExtremeOverclocking.com.
Sweet jeebus!
Some nice farms over there, I am inspired...
Also the tutorial section in the front is nice too, I wish I had the time, experience and data to type something like that up.
When I crunch my system turns off. Working with Supermicro on it, but until then no farm for me.What the hell good is a server motherboard that you can't use under sustained CPU load?
Particle's First Rule of Online Technical Discussion:
As a thread about any computer related subject has its length approach infinity, the likelihood and inevitability of a poorly constructed AMD vs. Intel fight also exponentially increases.
Rule 1A:
Likewise, the frequency of a car pseudoanalogy to explain a technical concept increases with thread length. This will make many people chuckle, as computer people are rarely knowledgeable about vehicular mechanics.
Rule 2:
When confronted with a post that is contrary to what a poster likes, believes, or most often wants to be correct, the poster will pick out only minor details that are largely irrelevant in an attempt to shut out the conflicting idea. The core of the post will be left alone since it isn't easy to contradict what the person is actually saying.
Rule 2A:
When a poster cannot properly refute a post they do not like (as described above), the poster will most likely invent fictitious counter-points and/or begin to attack the other's credibility in feeble ways that are dramatic but irrelevant. Do not underestimate this tactic, as in the online world this will sway many observers. Do not forget: Correctness is decided only by what is said last, the most loudly, or with greatest repetition.
When it comes to computer news, 70% of Internet rumors are outright fabricated, 20% are inaccurate enough to simply be discarded, and about 10% are based in reality. Grains of salt--become familiar with them.
Remember: When debating online, everyone else is ALWAYS wrong if they do not agree with you!
Random Tip o' the Whatever
You just can't win. If your product offers feature A instead of B, people will moan how A is stupid and it didn't offer B. If your product offers B instead of A, they'll likewise complain and rant about how anyone's retarded cousin could figure out A is what the market wants.
Wut? Seriously?
Oh wait till Dave sees this.. he's gonna give his buddy at SM "a call" and you will be flooded with new bios releases in no time
Indeed. The problems began when I swapped my H8DAE-2 for an H8DAi+-F. I suspected PSU at first, but I replaced the PCPC Silencer 750 with a Seasonic X-750 and the problems persisted. I've swapped GPUs, reinstalled Windows, and added more cooling as well. Since I know all the equipment was working fine on the previous board and the problems started when I changed out for the newer model, I'm left with little to suspect other than the motherboard. Based on that reasoning, I determined that it is very likely Supermicro's problem and have begun email support with them.
If he can nudge them to send me the latest H8DAi+-F BIOS, I'd be happy to try it.
The shutdown problem is weird, too. It doesn't just shut off, BSOD, or reboot or something like that. A total shut down I could explain as possible PSU overload protection. A reboot or BSOD I could explain as instability. Instead, the GPUs shut off, the USB controllers shut off, and it appears that the motherboard in general powers down. However, the heartbeat light continues to pulse, all fans and hard drives remain on, etc. The system pulls about 100W (versus 460W normal idle) and cannot be shut off by holding in the power button nor reset using the reset switch. It must be outright unplugged and left to sit until all power dissipates and all LEDs shut off. Short of waiting that long, it'll remain non-functional after power is restored.
Last edited by Particle; 03-12-2010 at 07:21 AM.
As a thread about any computer related subject has its length approach infinity, the likelihood and inevitability of a poorly constructed AMD vs. Intel fight also exponentially increases.
Likewise, the frequency of a car pseudoanalogy to explain a technical concept increases with thread length. This will make many people chuckle, as computer people are rarely knowledgeable about vehicular mechanics.
When confronted with a post that is contrary to what a poster likes, believes, or most often wants to be correct, the poster will pick out only minor details that are largely irrelevant in an attempt to shut out the conflicting idea. The core of the post will be left alone since it isn't easy to contradict what the person is actually saying.
When a poster cannot properly refute a post they do not like (as described above), the poster will most likely invent fictitious counter-points and/or begin to attack the other's credibility in feeble ways that are dramatic but irrelevant. Do not underestimate this tactic, as in the online world this will sway many observers. Do not forget: Correctness is decided only by what is said last, the most loudly, or with greatest repetition.
When it comes to computer news, 70% of Internet rumors are outright fabricated, 20% are inaccurate enough to simply be discarded, and about 10% are based in reality. Grains of salt--become familiar with them.
Remember: When debating online, everyone else is ALWAYS wrong if they do not agree with you!
Random Tip o' the Whatever
You just can't win. If your product offers feature A instead of B, people will moan how A is stupid and it didn't offer B. If your product offers B instead of A, they'll likewise complain and rant about how anyone's retarded cousin could figure out A is what the market wants.
Looks like the boards goes into hiberate mode for some odd reason, but it should also shut off hdds and fans then.
Weird, tried RMAing the board yet?
You use IRC and Crunch in Xs WCG team? Join #xs.wcg @ Quakenet
Ze gear:[22:53:09] [@Jaco-XS] i'm gonna overclock this damn box!
Main rig: W3520 + 12GB ddr3 + Gigabyte X58A-UD3R rev2.0! + HD7970 + HD6350 DMS59 + HX520 + 2x X25-E 32gig R0 + Bunch of HDDs.
ESXI: Dell C6100 XS23-TY3 Node - 1x L5630 + 24GB ECC REG + Brocade 1020 10GbE
ZFS Server: Supermicro 826E1 + Supermicro X8DAH+-F + 1x L5630 + 24GB ECC REG + 10x 3TB HDDs + Brocade 1020 10GbE
Lappy!: Lenovo Thinkpad W500: T9600 + 8GB + FireGL v5700 + 128GB Samsung 830 + 320GB 2.5" in ze dvd slot + 1920x1200 @ 15.4"
It's definitely not like hibernation or sleep mode. It's kind of hard to describe. The GPU fans stay on for instance but the red non-initialized lights kick on on the back like you see early during POST on ATI video cards.
As a thread about any computer related subject has its length approach infinity, the likelihood and inevitability of a poorly constructed AMD vs. Intel fight also exponentially increases.
Likewise, the frequency of a car pseudoanalogy to explain a technical concept increases with thread length. This will make many people chuckle, as computer people are rarely knowledgeable about vehicular mechanics.
When confronted with a post that is contrary to what a poster likes, believes, or most often wants to be correct, the poster will pick out only minor details that are largely irrelevant in an attempt to shut out the conflicting idea. The core of the post will be left alone since it isn't easy to contradict what the person is actually saying.
When a poster cannot properly refute a post they do not like (as described above), the poster will most likely invent fictitious counter-points and/or begin to attack the other's credibility in feeble ways that are dramatic but irrelevant. Do not underestimate this tactic, as in the online world this will sway many observers. Do not forget: Correctness is decided only by what is said last, the most loudly, or with greatest repetition.
When it comes to computer news, 70% of Internet rumors are outright fabricated, 20% are inaccurate enough to simply be discarded, and about 10% are based in reality. Grains of salt--become familiar with them.
Remember: When debating online, everyone else is ALWAYS wrong if they do not agree with you!
Random Tip o' the Whatever
You just can't win. If your product offers feature A instead of B, people will moan how A is stupid and it didn't offer B. If your product offers B instead of A, they'll likewise complain and rant about how anyone's retarded cousin could figure out A is what the market wants.
heres my pharm....
Its not overkill if it works.
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