P4 550e vs P4 550j

[WarSongdll]

Hi
I'm totally new to anandtech and I really need to know what is the diffence between the P4 550e and the P4 550j, I know there is a difference between price, can someone could help me by posting a like to a benchmark or a spec list of these to or only post what you know
Thank you

 

[LTC8K6]

There is no P4 550E as far as I know. There is a P4 3.4E, which is a Prescott in socket 478 format.

The 550J is an LGA775 socket P4 also running at 3.4Ghz. It's also a Prescott. The J indicates that it has the Execute Disable function and some extra thermal slowdown capabilities.

They will both perform about the same.

 

[WarSongdll]

If I give you a link showing LGA775 socket with P4 3.4 550e...

http://www.crawfordmicrosystems.com/pro...ocessors&SelectMfr=All%20Manufacturers

What you think it is, a mistype ? or they just dont know what they do?

 

[LTC8K6]

I think that should just be 550, not 550E. That'd be the same as the 550J without the security bit and the TM2 thottle capability.

 

[LTC8K6]

Text

You can see the 550 and the 550j here. There is a note at the very bottom explaining the j suffix.

 

[uOpt]

I think the "J" version have EMT64 (= AMD-compatible 64 bit).

You need a 924XE mainboard to use it, though.

 

[LTC8K6]

No, the J's don't have EM64T. Only the Noconas do at present.

Well, I guess the LGA775 chips could have EM64T built in but "turned off". 😀