Built in power drain ?

[Ibrihim]

How many watts does an IGPU consume(on average) ? Would a i5 2550k running at 3.2GHz use less power than an i5 2500k? also on the 2550k Is there an IGPU , if it's disabled does it still draw power ? Yes I know it doesn't output but. Finally would Ivybridges thermal properties benefit from a total lack of an IGPU - only would it still be an ivybidge que?

 

[Ferzerp]

It doesn't use any power when it's not in use.

Actually, the unused gpu helps IB cooling a bit. It serves as a heatsink of sorts, but core 0 is really the one that gains the biggest benefit from it. Any time you see an IB temp screenshot from P95, IBT or the like, the peak temp on core 0 is always the lowest of the peaks.

 

[ShintaiDK]

And even if its used its a very low power usage.

But as said, when unused its gated=0 power usage.

 

[Ibrihim]

Thanks for the answers . I just wondered if on cpu graphics can be unused as the on motherboard version. It seems it can be power free when not in use thanks again. Still curious about how much power they do use, and how much more power the latest Intel IGPU uses than the older 3000 series.

 

[bononos]

IGP uses very very little power compared to discrete cards even if it was turned on.

 

[Ferzerp]

IGP uses very very little power compared to discrete cards even if it was turned on.

Actually, it uses a bit more than comparable speed/slightly faster discrete cards when actually being used for 3d rendering.

 

[Magic Carpet]

IGP uses very very little power compared to discrete cards even if it was turned on.

22nm HD 4000 is less power efficient than say, 40nm Geforce 520. Under load scenarios, of course.

Still, a mountain to climb for Intel.

 

[Puppies04]

22nm HD 4000 is less power efficient than say, 40nm Geforce 520. Under load scenarios, of course.

Still, a mountain to climb for Intel.

Do you have numbers to back this up? I'm looking at a GT520 review and it shows idle-6W, average 23W, max 31W. What does HD4000 use?

Edit. Also keeping in mind HD4000 is between 50-100% faster than a GT520.

 

[ShintaiDK]

 

[Magic Carpet]

Do you have numbers to back this up? I'm looking at a GT520 review and it shows idle-6W, average 23W, max 31W. What does HD4000 use?

I don't own an Ivy yet so can't say. But I do own a Zotac Geforce 520 Zone Edition and I can say it's quite a power-efficient card, especially when used for playback HD videos. GF 520 w/ 1GB DDR3 memory uses less juice at idle AND video playback than GF 6200 64MB DDR. That's to say something.

Again, this is not reflected in reviews but the biggest problem with Intel video is drivers. I've used it on SB, not sure if things have gotten massively improved since. (especially true, if you game, there are tons of game incompatibilities and blue screens, especially with legacy software). Nvidia > ATI > Intel. Only 3rd in my book, I am afraid.

Edit. Also keeping in mind HD4000 is between 50-100% faster than a GT520.

Depending on game. HD 4000 performance is very inconsistent as you can see below. For the trouble-free experience, I can't recommend Intel video for my customers, unfortunately. People got carried away with power consumption way too far and had forgotten that stability & compatibility should come before it. A better tech process and lower electricity bills do not always warrant that.

 

[Ibrihim]

In Anand Tech the ASUS P8Z68-V PRO Review covers overclocking an IGPU. Also many motherboards offer voltage tweaks dedicated to the IGPU .As voltage always = heat when overclocking a cpu , I like the idea that my IGPU consumes almost nothing - so almost nothing to the power of ten still ain't much - but is it a good idea?

 

[2is]

Just an FYI. If you're running dual monitors you'll actually see lower system power consumption by about 30 watts (at idle) if you run your secondary monitor off the iGPU. At least that's what I saw with my 680 and 5870 if I had them driving either a single or dual monitors.

 

[Ferzerp]

It depends on the card. Some stay clocked up with dual monitors. My 480 did. The 680 does too. The 670 and 690 don't afaik. Not sure on the and side. But if you're trying to sip power, you aren't using these cards.

 

[2is]

It depends on the card. Some stay clocked up with dual monitors. My 480 did. The 680 does too. The 670 and 690 don't afaik. Not sure on the and side. But if you're trying to sip power, you aren't using these cards.

True, but since I'm not running any games on the secondary and the IGP is there, might as well use it. I initially used it to free up VRAM the power savings were just a nice side effect I noticed. I've also read that the clocking up happens when running mismatching resolutions.