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Looking at Intel's New-ish Desktop Socket, LGA 1366

Posted by timothy on from the odd-number-of-RAM-sticks-means-cognitive-dissonance dept.

Slatterz writes "LGA 1366 is Intel's first new desktop socket in four years. It uses the same ZIF design as the familiar LGA 775 architecture, but it incorporates many more contacts. These big architectural changes are backed up by some less visible advances. Until now, Intel's quad-core processors have been constructed from two dual-core dies, but now Core i7 brings together four cores on a single die. It's also Intel's first processor design to use an L3 cache, shared between all four cores."

4 of 100 comments (clear)

  1. Not the new desktop socket by nxtw · · Score: 5, Informative

    LGA 1366 is intended for servers, workstations, and high-end gaming PCs. LGA 1156 will be the mainstream
      desktop socket.

    What's the difference? IIRC, LGA 1366 has a tripe-channel memory controller and support for dual CPUs (via another QuickPath link). LGA 1156 has dual-channel memory support with support for only one CPU.

    The desktop CPU for LGA 1156 will be called Core i5.

    1. Re:Not the new desktop socket by vyvepe · · Score: 2, Informative

      LGA 1156: Also, there is 16 PCIe links on the processor die directly and there is only 2 GB/s connection from CPU to P55 PCH. No QPI. More information is here: http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=3570&p=2

    2. Re:Not the new desktop socket by Anonymous Coward · · Score: 2, Informative

      the Nehalem architecture is not bandwidth constrained at all

      Don't be silly. Total bandwidth to all 4 cores of an i7 920 on triple-channel DDR3/10333 is only 20GB/s. That's about 1.8 bytes per core per cycle. Given the existence of SSE instructions reading 16 bytes per cycle you're about 90% short of unconstrained bandwidth.

      Even with the best DDR3 money can buy you're still 80% short.

      I think you meant to say the Nehalem architecture is not bottlenecked at all.

  2. Re:It *is* absurd by drinkypoo · · Score: 4, Informative

    You're an idiot. Please don't post here anymore.

    Either you or your computer can set that power button to ACPI only, at which point holding it down for five seconds doesn't do anything except make the button temporarily shorter.

    You are an asshole. Please log in so you can be modded down.

    --
    "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"