New Haswell CPUs require this and using 1.5V memory can cause problems along the lines of: Please note we fit 1.35V memory into our G750s. Notebooks utilizing 4th Generation Intel (Haswell) processors require a new type of memory known as DDR3-Low Voltage or “DDR3L”.
Notebooks Cannot Complete Power On Self Test (POST) When Used With DDR3 Memory Module Newer Intel processors (since fourth-generation Haswell) require DDR3L memory regular DDR3 modules are out of specification for these processors and can cause the system to fail:
But you should go through the motherboard manufacturer's guide of supported RAM modules just to make sure if they are compatible or not.Ĭoming to the PC3 and PC3L part, PC3 RAMs requires an operating voltage of 1.5V whereas PC3L requires an operating voltage of 1.35V. Higher the number of banks, the fewer the chips in the memory module, the better the reliability and power consumption.Ĭompatibility is generally not an issue in most cases. The x8 in them specifies the number of banks in the memory module.
Rank is a data block which is 64 bits wide without Error Correction Code (ECC) created using some, or all of the memory chips on a module. 1Rx8 means it is a single-rank module and 2Rx8 means it is a dual-rank module module.