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Old 01-19-05, 02:38 PM   #1
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Default Prescott socket 478 support 64bit proof here

I just went to bios update and look what I found. I have this motherboard (system described below)

http://www.ecs.com.tw/ECSWeb/Downloads/ProductsDetail_Download.aspx?CategoryID=1&Typeid=1 &detailid=429&DetailName=Bios&DetailDesc=865PE-A(2.0)&MenuID=35&LanID=0

It's says added 64bit support?

I have Prescott 3.4Gh 478socket...


Can somebody comment out this one?
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Old 01-19-05, 03:25 PM   #2
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Default Re: Prescott socket 478 support 64bit proof here

I'm not sure what to make of it.
I wonder if current prescotts have
64bit support and it's turned off.

BTW.... I see u have a 3.4.
I would love a 3.4 but my budget is
only going to allow me a 3.2.
But if it can reach 4gig I'll be most happy.
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Old 01-19-05, 03:28 PM   #3
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Default Re: Prescott socket 478 support 64bit proof here

I got a new option in a BIOS saying Execute bit disabled --> flag enabled?

My Prescott CPU is 3.4Ghz stepping D0...
This BIOS update supports IA-64.
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Old 01-19-05, 04:36 PM   #4
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Default Re: Prescott socket 478 support 64bit proof here

Is there E0 or F0 stepping of socket 478 Prescott?
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Old 01-19-05, 04:43 PM   #5
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Default Re: Prescott socket 478 support 64bit proof here

Part No. Apply:83-221-H70683
(1).Product Name:865PE-A PCB 2.X
(2).Specification: .ROM type:FWH Winbond 49V002FAP
.ROM Package:PLCC
.BIOS Brand Code:683
.BIOS Version:2.2l
.BIOS CheckSum:8A00h
.BIOS VENDOR:Award





Release Notice

Model:865PE-A
Author:Angus Lee Date:12/23/2004
------------------------------------------------------------------------
(1). Release Reason:
1.Added Intel IA-32e CPU(64bits) support .

(2). BIOS Contents:
.BIOS Version:2.2l
.BIOS Brand Code:683
.BIOS CheckSum:8A00h
.ROM Package:PLCC
.ROM Type:FWH Winbond 49V002FAP
.BIOS Sign On Message:865PE-A Ver 2.2l 12/22/2004
.BIOS VENDOR:Award
.BIOS Part No:83-221-H70683

This is a text for release file...

Can anybody explain what Execute Bit Disabled means?
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Old 01-19-05, 04:56 PM   #6
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Default Re: Prescott socket 478 support 64bit proof here

Quote:
Originally Posted by red_star
Is there E0 or F0 stepping of socket 478 Prescott?

Yes I know there is an EO.
That's what I'm trying to find now.
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Old 01-19-05, 06:11 PM   #7
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Default Re: Prescott socket 478 support 64bit proof here

I know that Dell was selling Prescotts socket 478 E0 stepping for their workstations with added 64bit support.
I wish somebody can investigate this and test the Prescott s478 stepping E0 with this board after BIOS update is applied.
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Old 01-20-05, 02:05 AM   #8
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Default Re: Prescott socket 478 support 64bit proof here

Quote:
Originally Posted by red_star
I know that Dell was selling Prescotts socket 478 E0 stepping for their workstations with added 64bit support.
I wish somebody can investigate this and test the Prescott s478 stepping E0 with this board after BIOS update is applied.

Soon as I can lay my hands on one will be testing
with my Gigabyte.
Last updated bios for my board was dec.
All Prescotts are supported up to 3.4Ghz.
I want a 64bit P4 if I can find one.
This is why I have not ordered one yet.
I want a d@mn E0.
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Old 01-20-05, 02:33 AM   #9
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Default Re: Prescott socket 478 support 64bit proof here

Quote:
Originally Posted by bkswaney
BTW.... I see u have a 3.4.
I would love a 3.4 but my budget is
only going to allow me a 3.2.
But if it can reach 4gig I'll be most happy.
You know that extra 200 mhz only makes for about a 6.5 percent increase right?

You've got plenty of power...well, none of us have PLENTY...but you get the drift.
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Old 01-20-05, 12:01 PM   #10
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Default Re: Prescott socket 478 support 64bit proof here

btw, ShadowCast, I'm not sure your sig is a good idea in a PC hardware enthousiast forum that has an NV bias.

As for the thread:
The only Prescott that I know to _maybe_ support 64 bit is the 3.8J

All other Js have:
The J indicates it's the new E0 stepping, which includes the Execute Disable Bit (EDB) and Thermal Monitoring 2 (TM-2).

NO EMT64. Not yet!

Edit: There seems to be some confusion, at work we sell HPs 800 with P4J, and they are advertised with IA-32e. Extensions to 32bits. It does not seem to be equal to EMT64, and definitely not IA-64, since this was the Itanium and not backward compatible with 32 bits.

Edit2: Maybe IA-32e is equal to EMT64, I don't know, read here: http://www.intel.com/technology/64bi...s/30083502.pdf
Appendix B is interesting.
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Old 01-20-05, 12:28 PM   #11
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Default Re: Prescott socket 478 support 64bit proof here

CONFIRMED

NOT the J with an E0 stepping though. The F with an E0 stepping.

Quote:
Extended Memory 64-bit Technology (EM64T) is Intel's implementation of AMD's AMD64 architecture, an extension to the IA-32 instruction set which adds 64 bit extensions to the x86 architecture. It is almost entirely compatible with AMD64.

The technology is sometimes incorrectly referred to as EMT64. The correct name is EM64T.

Intel's first processor to actively implement the EM64T technology is the processor codenamed Nocona, and is being sold as Intel's latest dual-processor capable Xeon. Since the Xeon itself is directly based on Intel's desktop processor, the Pentium 4, the Pentium 4 also has EM64T technology built in, although as with Hyperthreading, this feature was not initially enabled on the then-new Prescott design, likely because Intel had not yet perfected it at the time. Intel has since begun selling EM64T enabled Pentium 4's using the E0 revision of the Prescott core, being sold on the market as the Pentium 4, model F. The E0 revision also adds eXecute Disable(XD) support to EM64T, Intel's name for the NX bit, and should be backported in to the Nocona design soon.

EM64T gives Intel processors direct access to memory quantities in excess of 4 Gigabytes and allows larger applications to be run. The AMD64 architecture also adds additional registers and other performance improvements to the instruction set. With 64-bit memory address limits, the theoretical memory size limit would be 16 Billion Gigabytes (16 Exabytes), although the initial implementations do not support the full 64-bit addressability.

The history of the EM64T project is long and convoluted, mainly due to the internal politics of the Intel Corporation. It started out with the codename Yamhill, named after a county in the state of Oregon in the USA. After several years of denying this project existed, Intel eventually admitted it existed in early 2004, and gave it the codename CT (Clackamas Technology); as it turns out Clackamas is the name of a county adjacent to Yamhill county. Then within the space of weeks of the CT announcement, Intel gave it several new names. After the spring 2004 IDF, it gave it the decidedly lacklustre name of IA-32E (IA-32 Extensions), and then a few weeks later it came up with the name EM64T. Intel's chairman, Craig Barrett, had to admit that this was one of their worst kept secrets.

This technology is not compatible with Intel's earlier 64-bit IA-64 technology, upon which the Itanium processor is based. EM64T cannot run the same software written for IA-64. EM64T is an extension of the 32-bit x86 or IA-32 instruction set, while IA-64 is a completely new architecture. Although IA-64 could directly execute IA-32 instructions it was not able to run the existing IA-32 software fast enough for users. Because the AMD64 architecture is an extension of the existing IA-32 architecture, improvements to IA-32 performance also improve 64-bit performance and vice versa.

Intel tried to keep the existence of EM64T secret for a long time for two reasons. First reason was that it did not want to give its customers mixed signals about the future viability of its Itanium IA-64 processors. However, the success of AMD's Opteron and Athlon 64 processors, based on its AMD64 technology, meant that Intel had to respond to the competitive threat. The second reason for Intel's secrecy was that Intel didn't want to admit that it had to copy from its arch-rival AMD. That's why it gave it the brand name EM64T rather than AMD64, even though they are near-identical twins. The EM64T documentation completely neglects to mention the origin of the instruction set. For this reason it is also known as iAMD64.
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