New Heatsinks and Motherboards

LGA-1156 processors use a different heatsink than both LGA-1366 and LGA-775 chips.


Lynnfield and its cooler

As the numbers would imply, the LGA-1156 heatsink has a larger footprint than LGA-775 but smaller than LGA-1366.


From Left to Right: Retail LGA-1366 Cooler, Retail LGA-1156 Cooler, Retail 45nm LGA-775 Cooler

The retail LGA-1156 is actually much closer to the 45nm LGA-775 retail cooler than the LGA-1366 retail HSF:

As you'll see later on in the article, the retail cooler isn't very good for heavy overclocking. Power users will want something a little bigger:

The Lynnfield/P55 launch is huge. Virtually every single motherboard manufacturer has a P55 board available. Prices range from ~$110 - $300 depending on the number of bells and whistles.


Gigabyte's ultra high end UD6 (left) and Gigabyte's lower end micro-ATX UD4 (right)


Gigabyte's high end UD6 comes with 6 DIMM slots like its X58 brethren.

Micro-ATX is increasing in popularity and we actually have some good options this time if you're trying to build a smaller Lynnfield system. Combined with Lynnfield's excellent idle power (the lowest of any quad-core we've ever tested), this could make for an unusually potent HTPC.


A closer look at Gigabyte's micro-ATX P55M-UD4

The only thing we're really missing is a good mini-ITX Lynnfield board. But perhaps the manufacturers will wait until we have on-package graphics before going down that route...

One More Time: New H55 Boards Next Year

As I subtley implied at the end of the last section, Intel is bringing on-package graphics to Nehalem starting in Q4 of this year:

The 32nm Nehalem shrink, codenamed Westmere, will be available with a 45nm Intel graphics core on the processor's package. This graphics core is an evolution of what's currently in the G45 chipset and not Larrabee (although eventually that will change). From what I've heard, this is actually going to be Intel's first reasonably good integrated graphics core.

With the graphics on-package, there needs to be an interface from the processor socket to video output located on the motherboard. As you can see from the P55 motherboards that are launching today: none of them have this video out. Granted there aren't any CPUs out to take advantage of it either.


No DVI/HDMI/VGA out...yet

Early next year (or maybe even late this year) we'll see a new breed of LGA-1156 motherboards with video output, designed for use with these Westmere IGP parts. Rumor has it that these motherboards will use Intel's H55 chipset.

Lynnfield early adopters need not worry, 32nm quad-core processors won't be out for at least a year.

The LGA-1156 Socket Homework: How Turbo Mode Works
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  • nikrusty - Wednesday, November 18, 2009 - link

    With this article Anandtech is Harder, Better, Faster Stronger.
    Seriously AWESOME ARTICLE! It cleared many of my doubts FLAT OUT! Now I know i5 is the way to go especially becoz I dont care about overclocking and just want good gaming performance...nothing screamingly extreme. Budget + Performance always keeps you level headed.
    Reply
  • shiro - Wednesday, October 21, 2009 - link

    what is that monster hoop of death heatsink that's on page 3? lol Reply
  • Eeqmcsq - Saturday, September 19, 2009 - link

    I asked a similar question in one of the other articles, so pardon me if this sounds repetitive.

    According to the Turbo charts, the slowest Turbo speed is higher than the stock speed. Why is that? For example, why not just make the 750 a stock GHz of 2.8 GHz instead of 2.66GHz?
    Reply
  • Eeqmcsq - Saturday, September 19, 2009 - link

    Argh, please ignore. Replied using the wrong Firefox tab. Reply
  • The0ne - Tuesday, September 15, 2009 - link

    Clear up what you're trying to show on the graphs please. You're getting more FPS at max setting than at min settings? Label the graphs like you did with the others please. With the others I can just look and understand what you're doing. With these, I'm scratching my head. Reply
  • The0ne - Tuesday, September 15, 2009 - link

    Ah, turbo mode represented in FPS >.>' Reply
  • kkara4 - Monday, September 14, 2009 - link

    over at bittech.net, they are saying that it is more worth it to go for the i7-920, if we are considering anything above the i5. this is a conflicting story, since anand is recommending the lynnfields. anand or anybody else for that matter could you please see their articles and tell me what they have done wrong? (or perhaps you guys failed to see something). Your article explains things in great technical detail which i can understand since i have studied microprocessors, hence i am more inclined to go for lynnfield. anyway if someone could cross check that would be good Reply
  • mapesdhs - Tuesday, September 15, 2009 - link


    If I've understood Anand's analysis correctly, the conclusion is that,
    for application mixes which involve a lot of single and/or dual-threaded
    codes, and assuming one is not interested in high-end SLI/CF setups
    or hard oc'ing all 4 cores all the time for tasks like video encoding
    or animation rendering, the 750/860 are better buys because they
    will internally push 1-core and 2-core clocks to a higher rate than
    occurs with the 920 via the Turbo function, giving better results
    than the 920, and of course the 750/860 are cheaper solutions
    (although the 860 price is similar to the 920, the mbd costs less
    than an X58, from what people say).

    So it depends on what you want to use your system for. No interest
    in CF/SLI? Running games that don't hammer 4 cores? An i5 750 or
    i7 860 makes more sense. Using apps that don't use more than 2 cores?
    Again the 750/860 is more logical, especially from a cost viewpoint.

    This ties in with the other advantage of the X58 platform, ie. the
    upgrade path to 6-core and 8-core CPUs. If this is something that
    holds no value to you, then P55 makes more sense.

    As always, it depends on what you want to use the system for. The
    attraction of the 860 from a more general point of view is that it
    also offers good quad-core performance when one does use all 4 cores
    without sacrificing the traditional higher-clocks possible with
    single or dual core setups when one is only using 1 or 2 cores. It's
    the best of both worlds, at least for out-of-the-box functionality
    anyway.

    However, if one does intend to use all 4 cores almost all the time
    (I do) with a strong overclock, then the 920 is a better choice
    because of the voltage issue and (IMO) the 6/8-core upgrade path.
    Likewise, high-end multi-GPU setups work better with X58.

    Given that general usage of a PC rarely uses more than 2 cores, this
    is why the 750 and 860 are such attractive options.

    As for the 870, despite its 1/2-core speed advantages, the price is
    too high IMO. For that kind of money, a 920 makes more sense, paired
    with better cooling if one has such a spare budget, or buy a better
    GPU setup which, for gaming, is where the real bottleneck lies.

    Anand, please correct me if I'm wrong with the above.

    Ian.

    PS. As always, real-world pricing issues can make a mess of on-paper
    technical conclusions. Also, although many games/apps don't exploit
    more than 2 cores now, this is likely to change in the near future as
    multi-core coding becomes more pervasive in the industry.

    Reply
  • mapesdhs - Monday, September 14, 2009 - link


    Anand/Gary,

    Re your comments about an X58 advantage being the ability to use
    later 6 and 8-core CPUs...

    I've been planning to build an i7 920 system for video encoding, so
    a max oc on all cores is useful to me; from the article I thus infer
    the X58 is a better choice.

    However, if I did buy such a setup instead of an i5 or i7 860, what
    would the cost tradeoff be do you think when the 6-core CPUs arrive
    with respect to upgrading? By that I mean, for total processing
    throughput, do you reckon a 6-core upgrade would be significantly
    cheaper than simply buying a second i7 920 setup? (gfx not an issue)
    If not, then the ability to use 6/8-core CPUs later in this context
    is somewhat lessened, something that would apply to animation
    rendering aswell (ie. extra complete systems perhaps more cost
    effective in increased overall throughput compared to upgrading to
    more cores). Any ideas? Also, unless the applications used can
    exploit more than 4 cores, the later 6-core CPUs won't help. I have
    about 1500 hours of material to convert to DivX. Each file is about
    40 to 45 minutes (documentary), so converting multiple files on
    multiple systems at the same time is very doable.

    Given the above, I'm looking forward to more details on how a max
    oc'd i860/i870 compares to a max oc'd 920.

    At present I'm just using a 6000+ setup to work out the appropriate
    format/conversion paths.

    Ian.

    PS. May I suggest you don't bother replying to those moaning in such
    an obviously ludicrous manner about the Turbo mode being active? I
    have the distinct impression their posts are designed purely to
    irritate. Please don't encourage them. Anyone with any sense will
    read the article and understand the salient points you've highlighted
    about Turbo mode being an integral function of the chip.

    Reply
  • Milleman - Sunday, September 13, 2009 - link

    I would say that i5 750 and Pehnom II X4 965 is fully comparable. AMD just have to adjust the pricetag and the price/performance will be on par. Looking at the Gaming rig performance, both i5 750 and Pehnom II X4 965 are well enough for gaming pleasure. I wouldn't shell out my bucks for the more expensive Intel top models. It's such a waste of money, unless you are working with huge video and image editing processes. Reply

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