Ram memory, or random access memory, is a type of computer memory that can be accessed randomly, meaning any byte of memory can be accessed without touching the preceding bytes. This contrasts with sequential access memory, where data can only be accessed in a predetermined order.
Ram memory is used to store data that is currently being used by the CPU, as well as data that has been recently used. This makes it very fast to access, but it also means that it is volatile, meaning that data is lost when the power is turned off.
RAM Types
There are two main types of ram memory, DRAM and SRAM. DRAM is the most common type of ram memory and is used in most PCs. It is slower than SRAM but is much cheaper to produce. SRAM is used in high-end PCs and servers, and is much faster than DRAM, but is also more expensive.
SRAM
SRAM is used in some devices, such as cache memory because it is faster than DRAM. SRAM uses flip-flops to store each bit of data. Flip-flops are made up of two transistors that are always in opposite states. When the power is turned off, the data in the flip-flops is not lost.
DRAM
DRAM is the most common type of RAM memory. It is used in most personal computers and servers. DRAM stores each bit of data in a separate capacitor within an integrated circuit. The capacitor can be either charged or discharged; this represents the 1 and 0 bits, respectively.
When the power is turned off, the charge in the capacitors quickly dissipates, so it must be constantly refreshed or it will lose data. There are three types of DRAM: SDRAM, RDRAM, and DDR SDRAM.
DDR SDRAM is the next generation of SDRAM memory, offering double the bandwidth of conventional SDRAM. DDR SDRAM is ideal for use in high-performance systems, such as servers, workstations, and gaming PCs.
DDR SDRAM offers a number of benefits over other types of memory, including higher data transfer rates, lower power consumption, and increased reliability.
DDR SDRAM is available in a variety of speeds and capacities, making it easy to find the right memory for your needs.
There are five types of DDR SDRAM.
- DDR1 SDRAM
- DDR2 SDRAM
- DDR3 SDRAM
- DDR4 SDRAM
- DDR5 SDRAM
1.) DDR1 SDRAM
DDR RAM ( Double Data Rate ) is the advanced version of SDRAM (Synchronous Dynamic Random-Access Memory).
- Developer – Samsung
- Type – SDRAM
- Release date – 1998
- Voltage – 2.5 to 2.6 Volt
- Clock Rates – 100 to 200 MHz
2.) DDR2 SDRAM
DDR2 RAM also transfers data twice. But DDR2 is capable of transferring data faster than DDR1.
- Developer – Samsung JEDEC
- Type – SDRAM
- Generation – 2nd Generation
- Release date – 2003
- Voltage – 1.8 to 1.55 Volt
- Clock rate – 100 to 266 MHz
- Cycle time – 10 to 3.75 ns
- Bus clock rate – 200 to 533 MHz
- Transfer rate – 400 to 1066 MT/s
3.) DDR3 SDRAM
DDR3 RAM also transfers data twice at the same time. But DDR3 is capable of transferring data faster than DDR2 and DDR1.
- Developer – JEDEC
- Type – SDRAM
- Generation – 3rd Generation
- Release date – 2007
- Voltage – 1.5 to 1.35 Volt
- Clock rate – 400 to 1066 MHz
- Transfer rate – 800 to 2133 MT/s
4.) DDR4 SDRAM
DDR4 RAM also transfers data twice at the same time with high bandwidth. But DDR4 is more capable of transferring data faster than DDR1, DDR2 and DDR3.
- Developer – JEDEC
- Type – SDRAM
- Generation – 4th Generation
- Release date – 2014
- Voltage – 1.2 Volt
- Clock rate – 800 to 1600 MHz
5.) DDR5 SDRAM
DDR5 RAM also transfers data twice at the same time with high bandwidth. But DDR5, is more capable of transferring data faster than DDR1, DDR2, DDR3 and DDR4.
Because the upgrade version of DDR1, DDR2, DDR3, and DDR4 is DDR5.
- Developer – JEDEC
- Type – SDRAM
- Generation – 5th Generation
- Release date – July 14, 2020
- Voltage – 1.1 Volt
- Clock rate – 1600 to 3200 MHz
