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Power consumption of overclocked systems

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Wondered if anyone could help me out with some power consumption figures of the new LGA 1156 CPUs when they are clocked @ 4GHz. Also how does this compare to the LGA 1366 power consumption @ 4GHz.

When looking at this I think that overall system power consumption needs to be looked at as there are differences in the mobo architecture (north bridge)

I know that the 1366 consumes 130w and 95w for the 1156 at stock speeds
 
Dunno about overclocked power consumption but there are some stock figures over at Anandtech . . .

At idle the Core i5 and Core i7 870 use less power than any other processor we've ever tested. Note that these idle power figures include an idling GeForce GTX 280. With a lower power graphics card, you could easily get to idle power consumption around 60W. Once we start seeing on-package GPUs, total system power consumption should drop even further.

 
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i5 looks to use less power than the e5300, has it been shrunk below 45nm? how do they compare clock for clock?

EDIT: just seen the load figures, e5300 is still the one to get for low power stuff it seems... :)
 
Overclocking is only free if you don't pay the electricity bill... :)
Hello Hotwired,

Welcome to OcUK forums! :)

I made that discovery myself easter 2008 and it turned my overclocking world upside down . . . . promptly followed by a new found interest in LV/ULV computing! :D

I got pretty vocal about it but the news wasn't well received on an overclocking forum! There are a lot more peeps interested now though but be prepared to have people call you a greenpeace hippy if you encourage them to turn down their voltages! :cool:
 
e5300 is still the one to get for low power stuff it seems... :)
well for peeps on a budget who wanna have a lil ULV box for day to day stuff then yeah (although the E5300 has been usurped by the new E6300). The thing is although the little Wolfdale uses less power at full load than the Lynnfield . . .the latter will cain through the workload much faster and in theory return to a low power idle state . . using less power overall! :cool:
 
I made that discovery myself easter 2008 and it turned my overclocking world upside down . . . . promptly followed by a new found interest in LV/ULV computing! :D

I got pretty vocal about it but the news wasn't well received on an overclocking forum! There are a lot more peeps interested now though but be prepared to have people call you a greenpeace hippy if you encourage them to turn down their voltages! :cool:

My sentiments exactly, although my main PC needs to be high performance so ULV doesn't really do it for me :) But I am a proponent of buying high performance but power-efficient kit, and using technologies like Cool&Quiet/Speedstep always even when overclocking, because the difference they make to power usage is huge. I've even written a short tutorial on how to safely enable Cool&Quiet whilst overclocking to the max, but alas it got a poor response on here :confused:

I bought a GTS250 over a HD4850 (even though the HD4850 is faster) mainly because of its power efficiency and low-noise credentials, and I'm annoyed by nVidia abandoning HybridPower, and their lack of a speedstep-like technology for their desktop GPU's. It's insane that my GPU should be running at full whack, when all it's doing 99% of the time is running Aero.

I think most of the 4Ghz+ i7 crowd either do not pay their electricity bill themselves, or have very well paid recession-proof jobs and aren't bothered about the significant extra power costs...
 
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Another convert to low power consumption after getting a power meter.

You don't have to sacrifice performance, you just simply stick to stock speeds and then undervolt until you hit the lowest stable voltage.

My next upgrade will be a move to the Radeon 5000 series, ideally a upper midrange model with 1Gb ram, 40nm process and passive cooler (Gigabyte Silent Cell division, get to work! :))
 
Another convert to low power consumption after getting a power meter.

You don't have to sacrifice performance, you just simply stick to stock speeds and then undervolt until you hit the lowest stable voltage.

My next upgrade will be a move to the Radeon 5000 series, ideally a upper midrange model with 1Gb ram, 40nm process and passive cooler (Gigabyte Silent Cell division, get to work! :))

"Upper midrange" all the way :D
 
[ESRA]Taf;14845222 said:
It's insane that my GPU should be running at full whack, when all it's doing 99% of the time is running Aero.
The important question is why it even should be running in 3D mode for just plain OS.
Would love to see environmental organisations attacking MS for their bloated resource hogging operating systems...
When I started to play with computers OS was something whose job was to provide platform for software to run... nowadays it seems more like that job of OS is to consume every available resource and maybe give some of it to software if it cares to do that.
http://en.wikipedia.org/wiki/Wirth's_law

But even without need for 3D mode higher end graphics cards are just amazing power hogs... practically like if car would suck twenty liters per hour just for idling.

Also CPUs should definitely be such that they can adjust clock speeds of individual cores widely basing to their load and put unnecessary cores into some deep sleep modes.

be prepared to have people call you a greenpeace hippy if you encourage them to turn down their voltages! :cool:
One sentence: Self-centered egoistic stupidity of modern urban human.
Those ones not concerned about excessive use of natural resources and disturbing climate should be thrown into middle of north Atlantic winter storms in rowing boats.
At least before industrial revolution and modern times it was made clear to everyone that this little pest specie isn't above nature...
 
well for peeps on a budget who wanna have a lil ULV box for day to day stuff then yeah (although the E5300 has been usurped by the new E6300). The thing is although the little Wolfdale uses less power at full load than the Lynnfield . . .the latter will cain through the workload much faster and in theory return to a low power idle state . . using less power overall! :cool:
Nice, do you know if they've started making these chips at 32nm now then, or are the improvements down to a different CPU design?
The i5 750 is a quad though, 20 more watts for 2 more cores sounds good to me.
Are they going to do an i5 Dual core?
 
are the improvements down to a different CPU design?
Anand Lal Shimpi said:
Intel made a very important announcement when Nehalem launched last year. Everyone focused on cache sizes, performance or memory latency, but the most important part of Nehalem was far more subtle: the Power Gate Transistor.

Transistors are supposed to act as light switches - allowing current to flow when they're on, and stopping the flow when they're off. One side effect of constantly reducing transistor feature size and increasing performance is that current continues to flow even when the transistor is switched off. It's called leakage current, and when you've got a few hundred million transistors that are supposed to be off but are still using current, power efficiency suffers. You can reduce leakage current, but you also impact performance when doing so; the processes with the lowest leakage, can't scale as high in clock speed.

Using some clever materials engineering Intel developed a very low resistance, low leakage, transistor that can effectively drop any circuits behind it to near-zero power consumption; a true off switch. This is the Power Gate Transistor.



On a quad-core Phenom II, if two cores are idle, blocks of transistors are placed in the off-state but they still consume power thanks to leakage current. On any Nehalem processor, if two cores are idle, the Power Gate transistors that feed the cores their supply current are turned off and thus the two cores are almost completely turned off - with extremely low leakage current. This is why nothing can touch Nehalem's idle power:


Entire System

I'm a bit excited! :p
 
But even without need for 3D mode higher end graphics cards are just amazing power hogs... practically like if car would suck twenty liters per hour just for idling.

Also CPUs should definitely be such that they can adjust clock speeds of individual cores widely basing to their load and put unnecessary cores into some deep sleep modes.

One sentence: Self-centered egoistic stupidity of modern urban human.
Those ones not concerned about excessive use of natural resources and disturbing climate should be thrown into middle of north Atlantic winter storms in rowing boats.
At least before industrial revolution and modern times it was made clear to everyone that this little pest specie isn't above nature...

OK, as I'm typing this on a handheld that's been charged from a solar charger in the sunroof of my car I'm start off by asking you where you think double standards start and end?

No-one needs a personal computer. The very fact that any of us have one puts us into the unnecessary consumption camp. My laptop consumes roughly 70W when it's running flat out and that's powering everything - dual core E9300, SSD, 15" LCD - everything.

So why do I have a personal desktop? For fun.

Now, in the same way that eating meat, driving my car and taking my PPL(H) lessons damage the environment, I'm not overly concerned because my carbon footprint is pretty low, and I have no children so it ends with me.

I've just built a house. It's German designed and extraordinarily efficient in terms of insulation and harvesting spare energy from the wind, ground and the sun, but it still used up more of my carbon budget building it than staying in my old one for the rest of my life.

Now, I can remember having to drive around the UK with a pocketful of 10p pieces because there were no mobile phones. People are slaughtering thousands of their fellow nationals in Africa to get control of the Palladium and Molybdenum mines that allow mobiles to be made, but I'm not going to give up my mobile.

The truth is that as a species we are selfish and prone to indulging our desires above the needs of other humans, let alone the animals and plants around us.

I am aware of all of this, and I admire Big.Wayne for constantly pressing his belief that ULV computing is the way forward, and actually, there isn't one of us that doesn't want the lowest CPU power consumption simply because it helps with the overclock.

You, on the other hand are simply being self-righteous, and that's not at all admirable.

You want to throw human beings that don't agree with you to their certain deaths in the icy North Atlantic. Why? Possibly you honestly think they deserve it, possibly you think such people should be punished. Possibly you're a sick freak that watches movies like SAW and enjoys it, whilst depleting the planets resources a bit more. You probably just thought it was a clever thing to say.

You want to go back to before the industrial revolution when this little pest species wasn't above nature? Why? Have you ever seen someone who died from a wound that was infected and could have been cured with penicillin, only there were no antibiotics and they died in agony, stinking and making crunchy noises every time they moved because gas gangrene had set in? Do you really want old people to die at 45? Do you really want all the teeth in your head to drop out or your girlfriend to not wear make-up? Do you want to have to go out and catch and kill your own food? Do you want to have to stay in one place for the whole of your miserable life because the best form of transport available is a horse and you'll never be able to afford a horse? Of course you don't.

So please stop using up the planets resources coming on here and being a self-righteous little prig. If you had an ounce of social concience you'd sign up for overseas volunteer work and when you came back, you'd grab every little modern luxury and hug it, just like I did. And I appreciate that not everyone has what I have. That doesn't mean I'm giving it up though.
 
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