Windows 11 Upgrade Guide
Will DDR 4 2666 Mz work on HP Z240 PC with I7-6700 processor
@Syed33 -- is this your computer: HP Z240 Tower Workstation Specifications | HP® Customer Support
That web-page lists the compatible RAM, and maximum RAM.
Note that "2666" RAM may also function at the slower "2133" speed.
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