Feeding the Beast: 2x Cache Bandwidth in Haswell

With an outright doubling of peak FP throughput in Haswell, Intel had to ensure that the execution units had ample bandwidth to the caches to sustain performance. As a result L1 bandwidth is doubled, as is the interface between the L1 and L2 caches.

L1/L2 cache latencies and sizes remain unchanged. The same isn't true for the L3 cache however.

Haswell's Wide Execution Engine Decoupled L3 Cache
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  • defiler99 - Tuesday, October 16, 2012 - link

    One of the best articles on Anandtech in some time. This is great original tech industry reporting.
  • Gc - Saturday, January 12, 2013 - link

    Congratulations, an intel cpu engineer wrote around 27 Dec 2012:

    "... Anandtech's latest Haswell preview is also excellent; missing some key puzzle pieces to complete the picture and answer some open questions or correct some details but otherwise great. ..."

    http://www.reddit.com/r/IAmA/comments/15iaet/iama_...
  • xaml - Thursday, May 23, 2013 - link

    This was first posted here a few handfuls of pages back as a comment by user "telephone". ^^
  • yhselp - Friday, March 29, 2013 - link

    A few questions.

    Is there going to be a replacement (37W) for the current IVB 35W quad-core part? Quite a few designs are now dependable on this, lower power quad-core option - Sony S-series and Razer Blade, to name a few.

    When can we expect all mobile CPUs (except maybe for the extreme series) to fall into the 10W-20W range? In three years' time and 10nm?

    The decision to not include GT3 with desktop parts is very disappointing. A 35/45W low-voltage part with GT3 would make for an excellent HTPC build, among other things. Is there a chance Intel change their mind and start shipping GT3 desktop parts at some point?
  • JVimes - Tuesday, August 19, 2014 - link

    Does EU stand for Execution Unit? That was surprisingly hard to google for.

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