Intel's Core Ultra 200S "LGA 1851" CPUs won't be compatible with the contact frames designed for the LGA 1700 platform due to structural changes.
There has been quite a buzz around Intel's next-gen Core Ultra 200S desktop CPUs and their respective cooling solutions, especially since it was disclosed that Intel has adjusted the CPU hotspot slightly to the north of the IHS when compared with the previous generations. thermal pipes
This ultimately prompted the debate on whether cooling manufacturers would need to completely replace their solutions, but clarity from MSI recently showed us that a whole workaround wouldn't be needed; rather, dedicated "offset mounts" will do just fine.
The mounting holes for LGA1700 and LGA1851 sockets are positioned in the same locations, so that the backplates used for LGA1700 coolers will align correctly with the LGA1851 socket.
This means that the LGA1700 socket remains mechanically compatible with the LGA1851 (for thermal solution only), and that existing thermal solutions designed for LGA1700 can fit on LGA1851 without modification. It's important to note that while the mounting mechanism is compatible, users should always consult with your thermal solution provider directly for thermal and power compatibility.
Now, Albert Thomas, a renowned CPU cooling expert, has disclosed that contact frames from third-party companies like Thermal Grizzly and Thermalright, which were initially designed for the LGA 1700 socket type, won't be compatible with Intel's Core Ultra 200S CPUs since the size of the new LGA 1851 is a bit "bumped up", which has messed up the contact between the frames and the CPU's IHS, creating a small gap in the edges, although the gap isn't visible when looked at initially.
However, the change in the design of Intel's Core Ultra 200S CPUs might be compensated by the new "Reduced Load" ILM, which is said to be a flatter version of the traditional loading mechanisms we see on motherboards, and this might compensate with the "minor" height difference between existing contact frames and Intel's Arrow Lake processors, but yet again, we still are unsure how things will turn out.
Certain offset mounts from manufacturers such as MSI will also help further reduce the temps on the Core Ultra 200S CPUs. Arctic and Noctua have also released their LGA 1700 to LGA 1851 socket compatibility list for their respective coolers and they will also be offering support kits for the older coolers.
There will be a need for some sort of a workaround to make existing LGA 1700 cooling solutions compatible with Intel's LGA 1851 platform, whether that will include dedicated mounts or even adjustments by motherboard manufacturers to change up the loading mechanism. Regardless of it, we'll be looking around to see whether we get a decisive upgrade by cooling manufacturers, and till then, enjoy Intel's newest CPU release.
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