The LGA-1156 Socket: Size and Installation

The first Core i7, Bloomfield, went into a 1366-pin LGA socket:

A year later we have Lynnfield, and it fits in a much tighter space:

The LGA-1156 socket and Lynnfield CPUs are about as big as the old LGA-775 sockets/chips:

From Left to Right: Intel Core i7 "Bloomfield" (LGA-1366), Intel Core i7 "Lynnfield" (LGA-1156), Intel Core 2 Quad "Yorkfield" (LGA-775)

Note the pad densitiy of Lynnfield vs. LGA-775 processors

The installation process is largely the same as any other Intel LGA socket, the difference being that LGA-1156 uses a new one-sided retention mechanism.

After the socket is "open", gently place the CPU on top of the pins. The chip can only fit in one direction so just pay attention:

With the chip in the socket and the lever still pulled back, move the socket cover over the CPU and slide its teeth under the retention screw on the opposite side:

Then, lower the lever, lock it in place and you're good to go:

Index New Heatsinks and Motherboards
Comments Locked


View All Comments

  • yacoub - Tuesday, September 8, 2009 - link

    lol, what a stupid comment. yes it's "cheating" to benchmark the processor the way it comes out of the box, which also happens to be how it is used in the real world environment.
  • Voo - Tuesday, September 8, 2009 - link

    Well there are many users who don't bother with overclocking so the tests aren't "illegal" or anything.

    But I tend to agree that most users who would be interested in buying an i7 920 or i7 860 would overclock it, so turbo mode wouldn't help at all, as we see with the OC results.

    I'm curious if PCI-e on die is the only problem and if we'll see new chips who benefit from turbo mode even when overclocked. After all the principle behind turbo mode doesn't change if you overclock, does it?
  • james jwb - Tuesday, September 8, 2009 - link

    IF that's true, i'm not at all happy with this review. But i'll wait for someone else to confirm this for obvious reasons... anand, confirm!
  • Voo - Tuesday, September 8, 2009 - link

    You read the text, didn't you? It was mentioned several times..
  • james jwb - Tuesday, September 8, 2009 - link

    i don't have time to read through all of it right now, was just flicking through and immeditaly thought to ask the question. I will read it fully later on, though.

    Hence why i asked the question. You say "it", as in which way, benches had turbo, benches didn't?
  • snakeoil - Tuesday, September 8, 2009 - link

    yes again, turbo was on for all the benchmarks which is illegal and biased.
  • maxxcool - Tuesday, September 8, 2009 - link

    yes, the federal government says making a feature that makes your product better is legal.
  • JarredWalton - Tuesday, September 8, 2009 - link

    Illegal and biased? Yes, Intel is illegally making their CPUs run better at all workloads for normal users that don't overclock. Someone should arrest them! What would be biased is to test these CPUs in a fashion that artificially limits performance. Sure, it would be nice to see performance compared with and without Turbo enabled, but generally there's not enough time to run every potentially interesting test scenario.
  • snakeoil - Tuesday, September 8, 2009 - link

    there you go, finally you said it.
    all the benchmarks have at least 600 mhz over the processor's stock speed.
    that is outrageous, then if you want to compare the result with phenom 2 you have to overclock phenom 2 at least 600 mhz over stock speed.
    just to be fair
  • Anand Lal Shimpi - Tuesday, September 8, 2009 - link

    The processor's stock speed is variable according to the workload it's running, that's what turbo mode does. AMD will enable similar functionality in 2011. This is the out-of-box performance of Lynnfield. Turbo mode is a feature of the processor as it has been since the mobile Penryn days (and more recently Nehalem). There's no reason to disable it as no end user would, unless you want to make Intel look worse for some reason.

    We also ran Turbo on vs. off numbers in the review:">

    Take care,

Log in

Don't have an account? Sign up now