Power Consumption

Power consumption is very low thanks to core power gating and Intel's 32nm process. Also, when the integrated GPU is not in use it is completely power gated as to not waste any power either. The end result is lower power consumption than virtually any other platform out there under load.

Idle Power Consumption

Load Power Consumption

I also measured power at the ATX12V connector to give you an idea of what actual CPU power consumption is like (excluding the motherboard, PSU loss, etc...):

Processor Idle Load (Cinebench R11.5)
Intel Core i7 2600K @ 4.4GHz 5W 111W
Intel Core i7 2600K (3.4GHz) 5W 86W
AMD Phenom II X4 975 BE (3.6GHz) 14W 96W
AMD Phenom II X6 1100T (3.3GHz) 20W 109W
Intel Core i5 661 (3.33GHz) 4W 33W
Intel Core i7 880 (3.06GHz) 3W 106W

Idle power is a strength of Intel's as the cores are fully power gated when idle resulting in these great single digit power levels. Under load, there's actually not too much difference between an i7 2600K and a 3.6GHz Phenom II (only 10W). There's obviously a big difference in performance however (7.45 vs. 4.23 for the Phenom II in Cinebench R11.5), thus giving Intel better performance per watt. The fact that AMD is able to add two more cores at only a 13W load and 300MHz frequency penalty is pretty impressive as well.

Gaming Performance Final Words
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  • RMSe17 - Monday, January 03, 2011 - link

    Time for an upgrade :) Reply
  • marc1000 - Monday, January 03, 2011 - link

    I decided to jump the first core-i lineup, and sitck to an old core2duo for some more time... now seems the wait was worth it!

    I just hope the prices outside US/Europe will be reasonable..

    thanks Anand,
    Reply
  • vol7ron - Monday, January 03, 2011 - link

    I think there are many of us that had the same idea. Unless needing to upgrade due to malfunction or new laptop purchase, holding C2D til past the i-Series was the best move to make; whereas buying into C2D asap was the best move at the time.

    Still going to wait for prices to fall and more USB3 adoption. Expected new purchase: mid-2011-mid 2012
    Reply
  • vol7ron - Monday, January 03, 2011 - link

    by "i-Series" it should have said "1st gen. i-Series" Reply
  • CptTripps - Tuesday, January 04, 2011 - link

    Ya know I usually do as you are but was an early adopter of the i7 920. Looking now it seems I made the right choice. I have had 2 years of kickassery and my processor still holds up rather well in this article. Reply
  • hogey74 - Thursday, January 06, 2011 - link

    Me too! I've got an e8400 running at 3.9 with almost zero OC know-how and its done me well. I might snap up an i7 if they and their mobos get cheap when sandy bridge has been out a few months... but may well skip that generation all together. Reply
  • Einy0 - Monday, January 03, 2011 - link

    Holy crapola AMD really needs Bulldozer now. Even in heavily threaded video encoding the 2600K at $300 is blowing the 1100T x6 out of the water. This is the the Core 2 Duo vs. A64 X2 all over again. Will Bulldozer be another Phenom, a day late and a dollar short? TLB bug anyone? As a PC enthusiast I really want to see competition to keep prices in check. If I had to upgrade today, I can't see how I could turn down the 2600K... Reply
  • medi01 - Monday, January 03, 2011 - link

    Did you add mobo price into equation?

    I don't get all the excitement, really. If anything, Intel's anti-overclocking moves
    Reply
  • MonkeyPaw - Monday, January 03, 2011 - link

    Yeah, new Intel motherboard models are never cheap. I don't understand why the price remains so high when more an more functionality is moving to the CPU. The other killer is that you need a new board for every Intel CPU update.

    Lastly, it's hard to throw the "buy now" tag on it with AMD's new architecture over the horizon. Sure, AMD has a tough act to follow, but it's still an unknown that I think is worth waiting for (if it's a dog, you can still buy Intel). Keep in mind that Bulldozer will have a pretty strong IGP, one that may make decent IGP gaming a reality. It will become a matter of how powerful the x86 portion of the Bulldozer is, and they are trying a considerably different approach. Considering the amount of money you'll be paying, you might as well see how AMD shakes out. I guess it just depends on if what you have today can get you by just a little longer.
    Reply
  • dertechie - Monday, January 03, 2011 - link

    You're conflating Bulldozer and Llano there. Bulldozer is the new architecture, coming to the desktop as an 8-core throughput monster. Llano is the first desktop APU, cramming 4 32nm K10.5 cores and a Redwood class GPU onto the die. The next generation of desktop APUs will be using Bulldozer cores. Reply

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