OCZ PC2-5400 (DDR2-667) 1 GB Computer Memory (RAM)

Expand Your Memory With 1GB of OCZ DDR2-667 PC2-5400 RAM

OCZ is a technology company that specializes in memory-related products. The company's 1GB DDR2 RAM can expand the amount of memory you have on your computer so you can have more programs and files open at the same time. DDR2-667 and PC-5400 are both names for the exact same type of module, although they refer to slightly different aspects of it.

The bandwidth measures the total data throughput or the amount of data that can be transferred at any given time. PC-5400, as the name is meant to reflect, has a bandwidth of 5,333 megabytes per second. This is a maximum potential limit. Real-world performance may be somewhat lower. The advantage of DDR2 is that it can transfer data four times per clock cycle. So even if the MHz clock rate is the same, DDR2 would still transfer more data compared to previous types of RAM.

The timing measures how long it takes the RAM to complete certain actions. This affects the absolute latency, or delay, of the system. There are two types of DDR2-667 RAM, each of which has a slightly different timing. They can be identified by the letters C and D; for example, DDR2-667C and DDR2-667D. DDR2-667C has a slightly lower delay than D, meaning it is faster, but only on the scale of a few nanoseconds.

Yes, there are a few special types of modules. However, the compatibility with your motherboard may vary.

• ECC: ECC stands for error-correcting code memory. It is specifically designed to identify and correct errors in the data. This is sometimes used for certain technical applications in which errors may cause particular problems. Support for ECC varies based on the motherboard. Most RAM is non-ECC.
• LP-DDR2: Designed for mobile devices, LP-DDR2 reduces both supply voltage and size to save power. It is a modified version of DDR2, although it is not compatible with standard computer motherboards.
• Buffered or registered memory: Buffered RAM boosts the stability and reliability of the system by placing an extra buffer between the RAM and the rest of the computer, although it comes at the expense of a slight delay. There are a few different types of buffered RAM and they may require a specifically designed motherboard to use.

Before purchasing RAM, make sure it is physically and electrically compatible with your motherboard. There are two main types of modules: DIMMs and SO-DIMMs. DDR2 DIMMs, which are physically larger than SO-DIMMs, have 240 pins. They are compatible with certain desktop motherboards. DDR2 SO-DIMMs, which have 200 pins, are compatible with the motherboards in laptops and other small form factor computers. DDR2 is not forward or backward compatible with different generations of DDR technology. You cannot combine it with DDR1, DDR3, or DDR4. It only works with other DDR2.