LGA1700: Reports of Bending Sockets

Since the launch of Intel's Alder Lake-based 12th generation Core processors, there have been several reports of high and abnormal temperatures, even at stock frequencies. The art in balancing out the integrated heat spreader (IHS) of a processor is one thing extreme overclockers have been working on for many years now. Typically called lapping, extreme overclockers finely sand down the IHS to make it a more flat and even surface. The aim is to reduce gaps by sanding out imperfections or curvatures. This is so that the cooling plate of the CPU cooler makes better contact with the IHS, and it has been known to reduce CPU thermals by a decent amount.


Our Core i9-12900K IHS is 'relatively' flat and even.

Fellow enthusiast Igor Wallossek published an article on his website, Igorlabs.de, which investigates potential issues with the ILM (independent loading mechanism), which keeps the processor firmly in place within the socket. Doing some investigations myself, our testbed Core i9-12900K which we've used the most doesn't seem to show any noticeable gaps or abnormal curvatures when used with a metal ruler. This, however, changes when we install the CPU into an LGA1700 socket or into one of the readily available Z690 motherboards.


The rear of the Intel LGA1700 socket with Core i9-12900K installed

There have been many reports that installing an Alder Lake processor into one of the cheaper Z690 or B660 models causes the CPU socket to bend and the IHS itself. We saw no bending before installing our Alder Lake processor into the socket of the GIGABYTE Z690 Aorus Master, which is a premium board priced around $470. Installing the Core i9-12900K into the socket and locking the ILM into place, we saw noticeable bending on the rear of the board, as our picture above illustrates.

The implications of this are two-fold. Firstly, from a cooling standpoint, it will and can lead to increased thermals due to the gaps this creates between the cold plate of the cooler and the IHS on the CPU. While thermal paste will generally fill some of the gaps, the problem is the nature of the gap and its size that the increased pressure the ILM creates. The second and perhaps the most fundamental part of this, it should NOT be happening.


Buildzoid 'rambles' about the LGA1700 washer mod, a potential fix?

While PCBs can be flexible, the nature of heat creating further expansion could lead to damaged sockets damaged processors and ultimately leave users with an expensive headache. There's also the potential to create permanent bends in the PCB area around the socket. This is not a good thing. It should be noted that LGA1700 motherboards either use ILM's manufacturers by Lotes or Foxconn, but it's reported that both ILMs are affected by this issue.

Fundamentally, there are a couple of potential workarounds to the issue, including a large, robust backplate. Still, on some of the AIO coolers, we have seen recently, these usually come with flimsy plastic backplates. Another potential fix is installing four washers to alleviate the issue. Both Igorlabs.de and Buildzoid have posted content detailing this, with Igor Wallossek doing some testing using washers of a different thickness to show variation.

The Intel Core i3-12300 Review: Quad-Core Alder Lake Intel Core i3-12300 Performance: DDR5 vs DDR4
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  • 29a - Thursday, March 3, 2022 - link

    No iGPU benchmarks, why? Reply
  • Calin - Thursday, March 3, 2022 - link

    Integrated GPUs live or die by the memory bandwidth, and using DDR5 would bring a huge difference.
    On the other hand, DDR5 is more expensive and might not "fit" a low-budget computer.
    Basically, people that buy a cheap i3 with expensive RAM and no dedicated GPU aren't that many.
    Reply
  • mode_13h - Thursday, March 3, 2022 - link

    As its iGPU has only 24 Execution Units, I doubt DDR5 will have such a momentous impact. Even if it does, there's still no way its iGPU performance is going to be terribly interesting or even competitive with 8 CU (512 shader) competition from AMD. Reply
  • mode_13h - Thursday, March 3, 2022 - link

    By comparison, consider that Tiger Lake needed up to 96 EU of a roughly comparable iGPU architecture to eke out a win over AMD's 8 CU iGPUs. So, that should set a very modest expectation for the iGPU performance of these chips. Reply
  • 29a - Thursday, March 3, 2022 - link

    If they would have benchmarked the iGPU we would know how it performs. I've heard for the last 2 years now how awesome Xe is going to be. Reply
  • mode_13h - Thursday, March 3, 2022 - link

    Then you need only look for a review of Tiger Lake's iGPU. Alder Lake is only a minor refresh of it.

    https://www.anandtech.com/show/16084/intel-tiger-l...
    Reply
  • WaltC - Friday, March 4, 2022 - link

    They don't want to say how bad it is...;) Just another one of those inexplicable omissions AT seems to enjoy making in product reviews, I guess. Even if it's terrible, it should be demonstrated. Anyway, I'll say that Intel has a long and somewhat stagnant history of 2-4 core CPUs...;) Reply
  • mode_13h - Saturday, March 5, 2022 - link

    Yeah, I think it could've done with a single page of 720p or 1080p benchmarks for a selection of relevant titles. Reply
  • MDD1963 - Monday, April 25, 2022 - link

    "Intel has a long and somewhat stagnant history of 2-4 core CPUs" Must be quite frustrating from AMD fans seeing the 'stagnant' i3 occasionally defeat the 5600X in gaming benchmarks, too... Reply
  • DannyH246 - Thursday, March 3, 2022 - link

    LOL - We all know why. Reply

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