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minute prescott cpu differences

leeroy

Gawd
Joined
Apr 14, 2004
Messages
578
i had a tray of prescot 3ghz 1mb cache 800mhz fsb which i personally thought were the same. the cpus worked in yyy mobo and zzz mobo so i assumed all the trays cpu were aight.

so we sold many many, but one customer claim it would not work at all (no post) in ttt mobo, so i swapped it out to him 3 times. he came back sayin still not work. so i thought 3 faulty cpus? so i tested the cpu in yyy and zzz mobo and refused to swap out any further stock since i already swapped three times and we was both getting pretty pissed off.. then i got customers ttt mobo and tested it in his. and it was true it never worked but it worked in my yyy and zzz mobo. so i then obtain 3 brand new cpus from stock and plugged into customers ttt mobo and it worked finally !!!!!

then i did a bit of detective work and found out that the 3 i replaced to the customer were same espec numbers of SL7E4 http://processorfinder.intel.com/sc...am=483&PkgType=6544&SysBusSpd=6107&CorSpd=ALL and the cpus which were wokring in the customers mobo ttt was espec no SL79L .http://processorfinder.intel.com/sc...am=483&PkgType=6544&SysBusSpd=6107&CorSpd=ALL.

the difference here i can see are the obvios therefore i wish to ask whats the difference between 3ghz and 3e ghz (its not extreme edition otherwise it would have double EE). as well as the stepping core. and the core voltage which i obviously know.

so the problem was clearly some type of incopatiblity problem with the core stepping and core freqeucny speed or something. but i really bugged about the "E" extension which i would like to know what it means....from research from the intel cpu finder webby the stepping core is some revision of the cpu like improvments right? and some webbys say some stepping core are better for oc. etc.
 
the 3ghz is a northwood core, the 3e ghz is a prescott core. the board probably just needed a bios update.
 
Actually they are both prescotts.

But it is the C0 vs E0 stepping that is the difference..

A BIOS update (if available) would probably allow both processors to work in that board.

==>Lazn
 
yea thats what headwuarters told me to do. but it does need a bios update since there was 5 updates and the mobo had version 3 on it . but bios updates 4 and 5 didnt say any prescott support. only ddr ram compatible
 
baldrik said:
the 3ghz is a northwood core, the 3e ghz is a prescott core. the board probably just needed a bios update.

i think they are both prescott core
 
Lazn_Work said:
Actually they are both prescotts.

But it is the C0 vs E0 stepping that is the difference..

A BIOS update (if available) would probably allow both processors to work in that board.

==>Lazn

yeah thats right, they are both prescott core, the only major difference are the steppping cores which i obviosuly wish to find out which cpu spec code was manufactured at a later date. maybe it has improved compatibilty that is why one has a newer stepping core
 
leeroy said:
yeah thats right, they are both prescott core, the only major difference are the steppping cores which i obviosuly wish to find out which cpu spec code was manufactured at a later date. maybe it has improved compatibilty that is why one has a newer stepping core

I'm guessing the D0 core was manufactured later as its a revision of the C0. That and the D0's CPUID string is higher (0f34h vs 0f33h of the C0). Best guess I can give.
 
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