Intel Shows 14nm Broadwell Consuming 30% Less Power Than 22nm Haswell

MojoKid writes "Kirk Skaugen, Senior Vice President and General Manager of the PC Client Group at Intel, while on stage, at IDF this week snuck in some additional information about Broadwell, the 14nm follow up to Haswell that was mentioned during Brian Krzanich's opening day keynote. In a quick demo, Kirk showed a couple of systems running the Cinebench multi-threaded benchmark side-by-side. One of the systems featured a Haswell-Y processor, the other a Broadwell-Y. The benchmark results weren't revealed, but during the Cinebench run, power was being monitored on both systems and it showed the Broadwell-Y rig consuming roughly 30% less power than Haswell-Y and running fully loaded at under 5 watts. Without knowing clocks and performance levels, we can't draw many conclusion from the power numbers shown, but they do hint at Broadwell-Y's relative health, even at this early stage of the game."

Comments

Re:ARM vs x86

[Sycraft-fu]

Ya I think ARM fanboys need to step back and have a glass of perspective and soda. There seems to be this article of faith among the ARM fan community that ARM chips are faster per watt, dollar, whatever than Intel chips by a big amount. Also that ARM could, if they wish, just scale their chips up and make laptop/desktop chips that would annihilate Intel price/performance wise. However for some strange reason, ARM just doesn't do that.

The real reason is, of course, it isn't true. ARM makes excellent very low power chips. They are great when you need something for a phone, or an integrated controller (Samsung SSDs use an ARM chip to control themselves) and so on. However that doesn't mean they have some magic juju that Intel doesn't, nor does it mean they'll scale without adding power consumption.

In particular you can't just throw cores at things. Not all tasks are easy to split down and make parallel. You already find with with 4/6 core chips on desktops. Some things scale great and use 100% of your CPU (video encoding for example). Others can use all the cores, but only to a degree. You see some games like this. They'll use one core to capacity, another near to it, and the 3rd and 4th only partially. Still other things make little to no use of the other cores.

So ARM can't go and just whack together a 100 core chip and call it a desktop processor and expect it to be useful.

Really, Intel is quite good at what they do and their chips actually are pretty efficient in the sector they are in. A 5-10 watt laptop/ultrabook chip does use a lot more than an ARM chip in a smartphone, but it also does more.

Also Intel DOES have some magic juju ARM doesn't, namely that they are a node ahead. You might notice that other companies are talking about 22/20nm stuff. They are getting it ready to go, demonstrating prototypes, etc. Intel however has been shipping 22nm stuff, in large volume, since April of last year. They are now getting ready for 14nm. Not ready as in far off talking about, they are putting the finishing touches on the 14nm fab in Chandler, they have prototype chips actually out and testing, they are getting ready to finalize things and start ramping up volume production.

Intel spends billions and billions a year on R&D, including fab R&D, and thus has been a node ahead of everyone else for quite some time. That alone gives them an advantage. Even if all other things are equal, they've smaller gates, which gives them lower power consumption.

None of this is to say ARM is bad, they are very good at what they do as their sales in the phone market shows. But ARM fans need to stop pretending they are some sleeping behemoth that could crush Intel if only they felt like it. No, actually, Intel's stuff is pretty damn impressive.

Re: 30%?

[Bram Stolk]

Parent is correct.
Power usage goes up with *square* of voltage, but is *linear* with clock speed.

Frequency does not matter much, voltage does.