Intel, oh Intel, how uninteresting your processors have been to us for so long now.  Where have the days of the Northwood gone?  Prescott brought us a minor bump in clock speed, minor increases in performance, and more importantly - major increases in power bills.  But if any company can go down the wrong path for five years and still come out on top, it’s Intel. So starting next year, we’ll start seeing a new Intel.  A more power conscious Intel and to kick it all off will be Intel’s first Earth-friendly dual core processor: Yonah. 

As the successor to the current Pentium M (Dothan) and the predecessor to next year’s Conroe, Merom and Woodcrest cores, Yonah is a very important chip.  As a mobile processor Yonah will bring dual core to thin and light notebooks, basically anywhere you’d find a Pentium M, you’ll now be able to find two Pentium Ms.  The implications for mobile performance are huge, as multitasking on notebooks has rarely been all that great of an experience.  At the same time, Yonah is so much more than just a dual core mobile processor - it’s a predictor of the performance of Intel’s next-generation desktop micro-architecture.  Sure, it won’t have all of the architectural bells and whistles that we’ll see when Conroe debuts at the end of next year, but it’ll have many and that makes it a reference point. 

The problem with the Pentium M architecture has been that although it’s traditionally done well at office tasks and obviously in the power consumption department, it has lagged behind the Pentium 4 and Athlon 64 when it comes to FP intensive applications such as video encoding, and to a lesser degree, 3D gaming.  With Yonah, Intel has promised to address those performance issues, and even more so with their next-generation micro-architecture later next year.  But we tend to want to see things for ourselves, and Yonah will at least give us an indication of how things have improved since Dothan, and whether or not Intel is on the right track to replacing the Pentium 4.

By now we’ve hopefully stressed the importance of Yonah, and there’s just one more detail to mention - we have one.

The Platform - Yet Another Socket

While the launch of Yonah still won’t be until January of next year, we’ve had a chip for the past month, unfortunately, we haven’t had a motherboard to stick it in.  We finally got one two days ago, which is why you’re seeing this article now, instead of more pictures of our Yonah posing alongside the Xbox 360.  The problem is that Intel seems to have changed sockets once more, meaning that Yonah is not backwards compatible with the original Pentium M socket.

If you’ll remember back to the introduction of the Pentium M, Intel introduced a brand new socket for the processor: Socket-479.  Back then, the desktop Pentium 4 still used the pin-based Socket-478, so the different pin-out was a bit of a pain to deal with as we all wanted to be able to stick Pentium Ms in our Pentium 4 motherboards. 

The Yonah socket is still a 479-pin interface, however the pin-out has been changed once more, and of course Yonah won’t even physically fit into any current Pentium M motherboards.  Instead, you’ll need a brand new motherboard with a brand new chipset.  So if you invested in any of the handful of desktop Pentium M motherboards that were released over the past year, you’re unfortunately out of luck.

Yonah (left) vs. Dothan (right) - Note the different pin-out

What’s this about a new chipset?  Well, it’s not exactly a new chipset, rather it’s Intel’s mobile 945 chipset - the mobile version of the desktop chipset we’ve had for quite some time now.   The platform we’re testing on in particular uses Intel’s 945G chipset, with integrated graphics, but of course we aren’t too interested in integrated graphics performance so we’ll be using the PCIe x16 slot on the board. 

While we can’t tell you who makes the motherboard we’re testing with, the important thing to note is that it is a desktop motherboard made specifically for Yonah.  It’s got a single PCIe x16 slot, meaning you don’t have to rely on integrated graphics, and all of the bells and whistles you’d expect from a desktop motherboard; this could very well be the heart of your next system.

We’ve been hearing that Pentium M based desktops will become a lot more common next year, and this motherboard is definitely an indication of that. 

Same Size, but Twice the Cores


View All Comments

  • nserra - Wednesday, November 30, 2005 - link

    Well he is assuming it will, if not.... another Intel fiasco. But then, I’m still impressed with the power consuming numbers.
    But how will it scale performance/power consuming? At 2.6Ghz 20%?
  • xsilver - Wednesday, November 30, 2005 - link

    my guess is that its an asus and it will be ridiculously priced.

    it will also be funny how intel will sell this as the "fastest" processor in the world . blah blah blah.. even though it still cant beat the p4 in video encoding

    has it been reported that there will be wide desktop mobo support, unlike the pentium M series so far? more manufacturers need to get in on the action b4 even the possibility of it becoming cheap.
  • VooDooAddict - Thursday, December 1, 2005 - link

    First version of a next generation Intel CPU... Slower then the previous generation? NEVER! Reply
  • nserra - Wednesday, November 30, 2005 - link

    "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."

    Yes i will wait, the wait, wait. Wait for wait. You must wait for wait. Then wait will wait for wait. Then i will wait for wait.
  • Marlin1975 - Wednesday, November 30, 2005 - link


    the pin-out has been changed once more, and of course Yonah won’t even physically fit into any current Pentium M motherboards. Instead, you’ll need a brand new motherboard with a brand new chipset.

    wow intel chaning the pin/board layout to force others to buy all new gear, who would have thought.
  • shabby - Wednesday, November 30, 2005 - link

    Geez they moved one little pin just to spite us, friggin sad. Reply
  • Shintai - Wednesday, November 30, 2005 - link

    Yonah and Dothan is electrical incompatible.
    You only end up with either a fried chip or simply no ability to even run it.

    The new socket is however future proff. It will work with the Merom mobile chip aswell.
  • Nyati13 - Wednesday, November 30, 2005 - link

    It's "rumoured" to be future proof, but Intel will probably change sockets between Yonah and Merom, like they always do. Reply
  • nullpointerus - Wednesday, November 30, 2005 - link do you know they didn't just move the pin to prevent people from frying the chip in older boards? In other words, does Yonah have a completely different use for the pins, or is it just a marketing scam? Reply
  • Deathcharge - Wednesday, November 30, 2005 - link

    I think Intel has a lot of potential, this is a great mobile cpu and we've come a long way from the original P4 (which is what I am using to type this comment). I think this is really just a taste of things to come and if I was AMD I would be looking at what else I have to remain competitive. Sure what they have is far better than anything Intel TODAY but this time next year might be a completely different story. Reply

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