Contrary to previous information, Intel’s Arrow Lake and Meteor Lake-S series desktop processors will use the new LGA-1851 socket rather than LGA-2551. In addition, new data indicates that the 2551-pin version may not be used at all for the LGA socket in desktop PCs. Probably, it will be used in other series of BGA chips.
The LGA-1851 socket has dimensions of 45×37.5 mm, which corresponds to the dimensions of the LGA1700/1800 series sockets for Alder/Raptor Lake processors. Thus, it can be assumed that the compatibility of cooling systems will remain.
The only dimensions that have changed are the height of the IHS (Integrated Heat Sink). Previously, it was 6.73-7.4 mm, now it will be 6.83-7.49 mm. It’s not a huge change, but it may require new mounting hardware for compatibility or more attention when installing coolers.
The taller layout may be a consequence of Intel’s new tiled architecture (based on Foveros technology) in the Meteor Lake desktop series of processors. But this is not the case for Alder Lake/Raptor Lake monolithic desktop processors.
On the slide, the abbreviation ARL is listed before MTL-S. Perhaps the Arrow Lake series will appear before Meteor Lake. Therefore, Arrow Lake-S could be the successor to Raptor Lake. Intel is in no hurry to share information about the Arrow Lake series, although it has already shown various variants of Meteor Lake chips.
Source: videocardz
