Power Consumption and Final Words

At 2.0GHz, Yonah is basically equal to, if not slightly slower than an Athlon 64 X2 running at the same clock speed in virtually all of the tests we ran. The important distinction here is that Intel is able to achieve that level of performance, without an on-die memory controller. But there is also one more thing to note, Yonah can offer that level of performance with significantly lower power consumption:

Total System Power Consumption - Idle

Total System Power Consumption - Load

While the Yonah and Athlon 64 X2 systems consumed relatively similar power at idle, Yonah hardly eats up any more power under full load. In fact, a 2.0GHz Yonah under 100% load consumes less power than an Athlon 64 X2 3800+ at idle. Obviously Intel has the advantage of being on a much lower power 65nm process, but it won't be until the second half of next year before we see any Athlon 64 X2s at 65nm, so it is an advantage that Intel will have for quite some time.

Although we didn't consider it as such here today , Yonah will be quite impressive on notebooks. The thought of having such a cool running dual core processor in a notebook is honestly amazing, and the performance difference (especially for multitaskers) over what we have today will be significant. The other thing to keep in mind is that when you go from a single core to a dual core Pentium M notebook, you won't be giving up anything at all. On the desktop side, you normally give up clock speed for dual core support, but Yonah will be running at very similar frequencies to what Dothan is running at today. In other words, you won't be giving up single threaded performance in favor of multi-threaded performance - you'll get the whole package.

As a desktop contender, Yonah is a bit of a mixed bag. While its performance in content creation applications has definitely improved over the single core Dothan, it still falls behind the Athlon 64 X2 in a handful of areas. Intel still needs to improve their video encoding and gaming performance, but it looks like we may have to wait for Conroe and Merom for that.

Multitasking Performance
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  • fitten - Wednesday, November 30, 2005 - link

    I've wanted an AMD 64-bit laptop for a while so that was a good read and made me feel a bit better about Turions.

    One other interesting thing about Yonah is the power management capabilities. I'd be interested to see the upcoming dual core Turion specs there. For instance, the Yonah, when in battery conservation mode, can turn off a complete core and parts of the L2 cache. I can't imagine the dual core Turion not having similar things, though, it would really give Intel the edge.
    Reply
  • tayhimself - Wednesday, November 30, 2005 - link

    UGH! I meant dual core Turion laptops in the last line Reply
  • bhtooefr - Wednesday, November 30, 2005 - link

    Umm...

    Note that it said "Total System Power Consumption" in the graphs...
    Reply
  • Viditor - Wednesday, November 30, 2005 - link

    Yup...my bad. (sorry for that Anand...)
    I really would like to get more info on the tests though. I understand that they have to keep the origins of the mobo quiet, but without the details it makes it very difficult to gauge exactly what and how the tests were conducted...

    I would also LOVE an "edit" function on these things...:)
    Reply
  • Calin - Friday, December 02, 2005 - link

    How about the overclocking experience? Reply

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