【 Weak current College 】 notebook memory type

Laptop integrated high-precision, design, requirements for memory, laptop memory must conform to the characteristics of compact, high-quality components and sophisticated technology, has a small size, large capacity, high speed, low power consumption, heat and other properties. For the pursuit of compact considering that most laptops up to a maximum of only two memory slots. For general text processing, Internet Office needs, install Windows98 operating system, use 128MB memory can meet your needs, if you install the operating system of a Windows2000, best 128MB + 64MB owns total 192MB memory above, if you are running WindowsXP, 256 MB is required. Because the notebook memory expansion slots are very limited, unit capacity larger memory will become more important. But this advantage is unit capacity memory in that same amount of time, there will be less heat, the stability of the notebook is also good.

Notebook memory generally can be divided into DDR SDRAM, EDO, three. Several well-known memory manufacturers and code: modern electronics (Hynix): HY, Samsung (SAMSUNG): KM or M, NBM: AAA, Siemens (SIEMENS): HYB, Goldstar LG-SEMICON: GM, Mitsubishi (MITSUBISHI): M5M, Fujitsu (FUJITSU): MB, moto.it168.com/' target = ' _blank ' class = ' pk ' > Motorola (MOTOROLA): MCM, MATSUHITA: MN, OKI: MSM, meikailong (MICRON): MT, TI (TMS): TI, Toshiba (TOSHIBA): TD or TC, Hitachi (HITACHI): HM, STI: TM, Jun (NEC): UPD, IBM: BM, NPNX: NN.

EDO memory: the memory is used primarily for old MMX and 486 models above, there are some manufacturers in PII in a notebook is still using EDO memory, the EDO single maximum capacity only 64M, and because EDO memory voltage to 5V and 3 .3V standard SDRAM compared to electricity, it was soon replaced by SDRAM memory.

SDRAM memory: notebook had Pentium era, the CPU speed is faster and faster, and Intel Corporation made a landmark memory technology-SDRAM. The full name is SynchronousDynamicRandomAccessMemory SDRAM (synchronous dynamic random access memory), as its name indicates, this kind of RAM you can make all the input and output signal and system clock synchronization. Because of the bandwidth for 64Bit SDRAM, it only needs one memory can work, data transfer is faster than EDO memory at least 25% faster. PC100 SDRAM PC66, included, PC133 several specifications.

DDR memory: as the name implies: DoubleDataRate (double data transmission) of SDRAM. With the introduction of DDR memory for desktop, laptops now also into the DDR era, there are specifications such as DDR266 and DDR333, now in mainstream adoption Pentium4-M, Pentium-M, P4 core Celeron machines are using DDR memory, also has a small number of machines entering the early Pentium3-M DDR era. In fact, the principle of the DDR is not complicated, it made the original a pulse read a profile of SDRAM in a pulse reading two information within, the pulse rise and decline of channel utilization, thus DDR essence is SDRAM. But relative to EDO and SDRAM, DDR memory, more power (voltage only 2.25V), single capacity greater (already can reach 1GB).