socket 478 400mhz cpu upgrades


I've read somewhere that intel makes a socket 478 version of the core duo. Would this work on my old socket 478 400mhz fsb intel hv84510a motherboard? Might it work at a lower clock speed? I have a ton of ram on this machine and i would like to see just how much it can be upgraded.
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It's really a socket 479 and it is not pin-compatible with the Pentium-M or siblings:  It requires a completely new board and chipset.
Actually Intel lists 3 core duo processors with socket 478-what Callandor refers to on his link is that the Pentium M is a socket 479.
But I don't think your board is compatible with these type processor due to the 2MB cache and the 667 mhz FSB required to run it. The Mobile Intel® 945 Express Chipset Family motherboards are compatible with this CPU and are only found in laptops.( since you have posted in desktops I assume this is important to you)
The hv84510a is old technology and won't run this processor.

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You have an Intel D845HV motherboard in that.
(Also called "El Paso" in some places. Do not confuse it with "El Paso 2".)

Here is your supported processors list:

Max is a 2.6 GHz P4 with 512k cache on a 400 MHz FSB.

Big "oops" on my part - I was indeed looking at the Pentium-M successor.  Thanks for the correction, sparkmaker!
I actually was interested in the link you posted stating the 479 pin. Even before I read the article I didn't know the pentium m cpus were of that persuasion, so I learned something too  :-)
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