What is the approximate bus speed of DDR2 memory rated at PC2-5300?

The bus speed of DDR2 memory rated at PC2-5300 is approximately 533 MHz. This rating translates to the effective data rate, which reflects how many operations can be performed per second. The "PC2" designation indicates that it is DDR2 memory, and the number "5300" suggests the theoretical bandwidth of the memory, measured in megabytes per second (MB/s).

In this case, PC2-5300 indicates that the memory can achieve a peak bandwidth of about 5300 MB/s. To understand how this correlates to the bus speed, it's essential to recognize that DDR (Double Data Rate) memory operates at twice the clock frequency due to its ability to send data on both the rising and falling edges of the clock cycle. For PC2-5300, this gives a bus clock speed around 266 MHz (as it effectively performs at half the data rate when accounting for DDR capabilities). Since data transfer is doubled with DDR, the effective clock speed results in an approximation of 533 MHz when referenced correctly in relation to data throughput.

Thus, the correct answer reflects the effective bus speed rather than a direct clock frequency.