https://community.intel.com/t5/Mobile-and-Desktop-Processors/Memory-Compatibility/m-p/1379235#M57475 Mismatched DIMM sizes will yield less than optimal performance - and you are correct, the speed of the slower DIMM will be used, lowering performance even more - but it will work.<BR />...S Sat, 23 Apr 2022 05:29:20 GMT n_scott_pearson 2022-04-23T05:29:20Z https://community.intel.com/t5/Mobile-and-Desktop-Processors/Memory-Compatibility/m-p/1379131#M57461 <P>Hi everybody. Please, I need to know the following. I have a&nbsp;<SPAN>Intel Core i3-1115G4 notebook by Samsung (Samsung Book - Windows 11 Home - Intel® Core™ i3 - 8GB - 256GB de SSD). It comes with 2 memory slots (1 has 8GB DDR4-2666MHZ). This machine accepts 32GB memory usage. What I want to known is If I can add a 16GB DDR4-2400MHZ module. The machine will turn on and run using the lower frequence (2400MHZ)? I asked the manufacturer but I didn't received a end point answer (yes or no for sure).&nbsp;</SPAN></P> <P>&nbsp;</P> <P><SPAN>Thanks,</SPAN></P> <P><SPAN>Alexandre M.</SPAN></P> <P>&nbsp;</P> Fri, 22 Apr 2022 17:31:30 GMT https://community.intel.com/t5/Mobile-and-Desktop-Processors/Memory-Compatibility/m-p/1379131#M57461 AlexandreM 2022-04-22T17:31:30Z https://community.intel.com/t5/Mobile-and-Desktop-Processors/Memory-Compatibility/m-p/1379235#M57475 Mismatched DIMM sizes will yield less than optimal performance - and you are correct, the speed of the slower DIMM will be used, lowering performance even more - but it will work.<BR />...S Sat, 23 Apr 2022 05:29:20 GMT https://community.intel.com/t5/Mobile-and-Desktop-Processors/Memory-Compatibility/m-p/1379235#M57475 n_scott_pearson 2022-04-23T05:29:20Z