DDR2, DDR3, Kingston, Wigan, Golden Pirate, Samsung of Yu Zhan, Lenovo Dell, Hewlett-Packard, which memory is better? Can protect data

The memory card is a random data memory, so it can't protect data.

DDR2 is not as fast as DDR3, so you must choose DDR3 to install a new machine. When upgrading the old machine, the frequency should be selected according to the bus clock of the motherboard.

Kingston, Weigang, Jinbang Pirate Ship, Yu Zhan Samsung, Lenovo Dell and Hewlett-Packard are all memory brands, and Kingston is the first choice. Of course, other brands are also good, but Kingston is the boss of memory and produces the most, so he was chosen. There are basically no fakes in Wei Gang, but the price is slightly higher. Different brands with the same specifications have similar quality, and the price difference is very small. More than 20% of them do not need to be considered, and it is more likely to be refurbished and branded.