Expand Your Computers Memory With DDR3 and SDRAM Modules

DDR3 is the third generation of double-data-rate technology. Each generation of DDR technology can double the data transfer rate of the one before it, so DDR3 can transfer data at eight times the speed of its internal memory. By upgrading your computer with DDR3 memory, you can potentially hold more programs and files open at the same time and access them faster than before.

What is the data bandwidth of PC3-12800?

DDR3-1600 and PC3-12800 refer to different aspects of the same memory module. The former refers to the data transfer rate. The latter refers to the bandwidth. PC3-12800 modules have a base clock speed of 200 MHz. Since DDR3 memory can transfer data at eight times the speeds of internal clock speed, the data transfer rate would be 1600. This is not the total bandwidth but rather the number of operations completed per second. The actual bandwidth is calculated by multiplying the data transfer rate by eight. This equals 12,800 megabytes per second, which represents the amount of data it can transfer. This is the maximum theoretical limit. Real-world conditions may be lower.

What are some additional features of PC3-12800 modules?

Apart from data bandwidth, here are some factors you should consider:

  • Latency: Column-access strobe or CAS latency is the delay time between the moment a memory controller tells the memory module to access a memory column and the moment the data is available on the RAM modules output pins. This is measured in clock cycles. There are four types of PC3-12800 or DDR3-1600 memory modules, which are identified by the letters G, H, J, and K. Each one has a higher latency than the one before it.
  • Voltage: DDR3 memory operates at standard voltage. DDR3L stands for low voltage. DDR3U stands for ultra low voltage. Some processors are only compatible with DDR3L or DDR3U modules.
  • Error correction: Error-correcting code, or ECC, can identify and correct errors in the memory. Modules without error correction are identified as non-ECC.
  • Buffered vs. unbuffered: Buffered (also known as registered) memory improves the signal integrity of the data by using a register. This allows the system to remain stable as more modules are added to the computer. Partially buffered memory has an R in its name. Fully buffered memory is identified by an F or FB, but it is only compatible with motherboards designed to accommodate it.
  • DIMM vs. SODIMM: DIMM (dual in-line) and SODIMM (small outline dual in-line) are different sizes of memory modules. The module itself forms the physical and electrical connection with the computers motherboard. DIMMs enable a 240-pin connection with the motherboard. They are primarily designed for desktop computers. The smaller, 204-pin DDR3 SO-DIMMs are designed for laptops.
Are different memory modules compatible with each other?

If you are adding different modules to the same motherboard, it is important to remember that PC3-12800 is only compatible with other types of DDR3 memory modules, and the computer may only operate at the speed of the slowest module. It is not compatible with other generations of DDR technology including DDR1, DDR2, and DDR4 due to electronic differences. Make sure that your motherboard is compatible with DDR3 modules as well.