You do know that AMD chips don't often have frequencies that match their "xxxx+" numbers, right? The whole Athlon XP and 64/x2 line (including "low-end" chips like the Sempron and stuff) have been using a PR system, so the 2500+ represents the chip's performance relative to a Pentium 4 (or a Celeron, for the low-end AMD models) at that frequency.
For example, the Athlon XP 2500+ chip (supposedly) has performance equal to or slightly greater than a 2.5GHz Pentium 4, even though its actual clock frequency is only 1829MHz (11x166).
Also, many AMD chips with the same PR number have different frequencies. For example, the Athlon XP 2500+ lists its speed as 1829MHz (11x166), the Sempron 2500+ is listed as 1743MHz (10.5x166), and the Mobile Athlon is 1862MHz (14x133). It's about as clear as mud to the average consumer, but I think that's what they're going for.
Also, make sure to check your system bus speed, and check your BIOS to see if you can set the bus speed and/or CPU multiplier.
Sorry if this seems too obvious, but often some of the simplest junk gets overlooked.
For example, the Athlon XP 2500+ chip (supposedly) has performance equal to or slightly greater than a 2.5GHz Pentium 4, even though its actual clock frequency is only 1829MHz (11x166).
Also, many AMD chips with the same PR number have different frequencies. For example, the Athlon XP 2500+ lists its speed as 1829MHz (11x166), the Sempron 2500+ is listed as 1743MHz (10.5x166), and the Mobile Athlon is 1862MHz (14x133). It's about as clear as mud to the average consumer, but I think that's what they're going for.
Also, make sure to check your system bus speed, and check your BIOS to see if you can set the bus speed and/or CPU multiplier.
Sorry if this seems too obvious, but often some of the simplest junk gets overlooked.