Data Rates Calculation Question

darkchild

My A+ certification study guide says:

"PCI expansion buses operate at 33 or 66MHz over a 32-bit (4 byte) channel, resulting in data rates of 133 and 266MBps, respectively..."

How did they get 133 and 266MBps? I multiplied 4 bytes by 33 and 66 MHz and the products were 132MBps and 264MBps, respectively.

hamster143

The frequency is really 33.33 or 66.66 MHz. For some reason, these numbers were usually rounded down.

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darkchild	Data Rates Calculation Question Tweet My A+ certification study guide says: "PCI expansion buses operate at 33 or 66MHz over a 32-bit (4 byte) channel, resulting in data rates of 133 and 266MBps, respectively..." How did they get 133 and 266MBps? I multiplied 4 bytes by 33 and 66 MHz and the products were 132MBps and 264MBps, respectively.

hamster143	The frequency is really 33.33 or 66.66 MHz. For some reason, these numbers were usually rounded down.