I have a 17" HP ProBook 470 G2 Business machine, Intel i7, 8GB RAM out of the box. I recently upgraded the hard drive to an SSD and added another 8 GB memory stick. I found the manual online which reports that differing size modules may be installed and run in dual-channel mode. I originally thought that matching modules were needed to run in dual-channel mode. Results may vary with manufacturer and chipset?
Two customer-accessible memory module slots supporting up to 16 GB of RAM
Supports dual-channel memory PC3L-12800, 1600-MHz, DDR3L SODIMMs
Supports the following configurations:
●16384 MB (8192 × 2; dual channel) My specs
●12288 MB (8192 + 4096; dual channel)
●8192 MB (8192 × 1)
●8192 MB (4096 × 2; dual channel)
●6144 MB (4096 + 2048; dual channel)
●4096 MB (4096 × 1)
●2048 MB (2048 × 1)
The manual further states which hard drives may be installed. I installed a Samsung SSD 860 EVO - 1 TB which is not a supported drive in the specifications but may have something to do with the Samsung Magician (drive controller) software which is installed? I don't know, it just works.
Supports the following 7 mm/9.5 mm, 2.5 inch hard drives:
●1.5-TB, 5400-rpm
●1-TB, 5400-rpm
●750-GB, 7200-rpm
●500-GB, 7200-rpm
●500-GB, 5400-rpm, hybrid (8-GB SSD) MLC
●500-GB, 5400-rpm
●320-GB, 5400-rpm
Supports the following 2.5 inch solid-state drives:
●256-GB, TLC
●128-GB, TLC
●128-GBFixed