Originally posted by: Netopia
All other specs are the same... why this FSB difference?
The difference is just that someone made a typo. Just like it says that the mobile barton runs at 1.25v... just not true. A typo!
Joe
Not quite true. Mobile Bartons are intended to run in laptops, where you will generally find that the motherboard is only capable of running at a max of 266 FSB. The motherboard's BIOS will recognise Mobile Barton chips and set the appropriate FSB and multiplier for the particular chip. The
recognised FSB would never exceed 266 FSB, even if you could find a laptop motherboard capable of higher bus speeds.
However, there is nothing in the design of Mobile Bartons that inherently restricts them to operation at 266 FSB. Moreover, Mobile Bartons are unlocked.
If you stick a Mobile Barton in a motherboard designed for desktops, the BIOS will most likely not recognise the chip and will therefore run it at a safe default FSB, probably 200 MHz, and at a low multiplier. But most motherboards have a BIOS that will allow you to alter these settings within certain ranges. It is usually therefore quite simple to change the FSB and multiplier. Modern Socket A motherboards have chipsets that can typically run at a FSB of 400 or above. Available multiplier settings do vary substantially between motherboards but, in most cases, you should be able to set a combination of FSB and multiplier that will result in a significant and stable overclock of your processor.
Default voltage of those Mobile Bartons that will fit in Socket A varies from 1.35V for chips rated at 2200+ and 2400+ (one version only, the AXMD2400FJQ4C) to 1.65V for all chips rated at 2800+ or above. The 2400+ can also be found at defaults of 1.45V and 1.65V. The Mobile Bartons 2500+ and 2600+ can be found either at 1.45V or 1.65V.
Mobile Bartons in a smaller package that
will not fit in Socket A motherboards are available at default voltages of 1.1V and 1.25V.