I've been thinking about them to, but every reseller has conflicting info on operating frequency, multiplier, and default voltage. AMD's documentation is lacking in the XP-M department, so I shot them an E-mail asking for the low-down last night.
For instance Newegg has the following listed:
AMD Mobile Athlon XP 2400+, 266FSB, 256K Cache - OEM
With the following OPN:
AXMH2400FQQ4C
The last "4" denotes 512KB cache, but It's listed as 256KB. Big difference.
The first "Q" denotes 1.45V operating voltage, but it's listed as 1.25V. Big difference.
Every site that sells XP-M's has the specs slightly different.
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The only XP-M that has a default voltage of 1.25V is the 1700, and according to the pic at newegg, it's a T-bred A core, AIRGA stepping none the less. That's the most ancient A core I can think of. * Runs away screaming*
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Something else I'm leary about... If 1.8GHz is the operating frequency, that equates to a multiple of 13.5 (133 x 13.5 = 1.8GHz). If these are locked, in order to reach a FSB of 200MHz with a multiplier of 13.5, the CPU will need to be running at 2.7GHz. Good luck.