Repairing and Upgrading Your PC

Memory Performance

In addition to the bandwidth rating of a memory module, such as PC3200 or PC2-6400, several other numbers are used to quantify memory performance. These values, known as timing parameters, quantify the response time and latency of the module. Memory is Figure 6-3. Types of memory used in new structured like a spreadsheet, with many columns and many rows, each of systems by year which contains one bit of data. Timing parameters specify the time required to perform such functions as changing the row or column and reading data. (It's not important to understand timing parameters except in a general, overall sense.)

For DDR-SDRAM and DDR2-SDRAM, memory vendors specify values, denominated in whole or fractional clock cycles, for ...