TheS400CA should have 1 available SODIMM socket for expansion up to 8GB of RAM. The 4GB that already comes with the laptop will have the RAM on-board. You cannot adjust the voltage via the BIOS like you could with a desktop, so I would make sure the RAM matches up. The new module might need the extra .15v of power to remain stable.
Timetec4GB DDR4 2666MHz PC4-21300 Non-ECC Unbuffered 1.2V CL19 1Rx8 Single Rank 260 Pin SODIMM Laptop Notebook PC Computer Memory RAM Module Upgrade (4GB) Crucial RAM 8GB DDR4 3200MHz CL22 (or 2933MHz or 2666MHz) Laptop Memory CT8G4SFRA32A
Accordingto the parts list for the 250 G8 product number you posted, it comes with DDR4-2666 MHz memory. HP PartSurfer . Chapter 1 of the service manual has the memory upgrade info and supported drive capacities. Maintenance and Service Guide (hp.com) According to the manual, the max memory is 2 x 8 GB and you can install a 1 TB NVMe SSD.
Upgradeyour Lenovo IdeaPad 320-14AST with compatible RAM and SSD upgrades from Crucial. Upgrade your laptop and experience a smoother computing experience with faster application launches, and seamless multitasking. 8GB removable. Compatible RAM. What's supported by your system: 8GB; 4GB; Reset Search results. Compatible memory for:
PCFormat Magazine/Getty Images. Most users need about 8 GB of RAM, but to use several apps at once, you might need 16 GB or more. If you don't have enough RAM, your computer will run slowly and
Regardingsystem memory and hard drive upgrades, the 15 3000, or more precisely the , and 3541, is very user-friendly. To access RAM and HDD, you just need to remove the plastic cover on the bottom of the chassis. The cover is held by only one screw, so doing operations such as replacing the pre-installed RAM or replacing pre uxPn. 45 419 362 406 151 346 122 115 497

can you upgrade 4gb ram to 8gb