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64 Bit Pentiums?

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n00b
Joined
Oct 23, 2004
Messages
16
I seem to remember someone posting a thread a while back about 64-bit Prescott's being sold in the UK or somewhere?

It's actually keeping me from upgrading right now, as I feel that if Intel gets on the 64-bit bandwagon plenty of others will follow.

I believe there's still some rumor that all Prescott's are 64-bit capable, but is there any idea as to when these chips will be officially available in the U.S. or is it all still speculation now?
 
It's only officially supported on certain sockets (Socket 775 aka Socket T) and certain chipsets (i925X, i925XE). Unofficial is still up in the air, I think.
 
You can get a 64-bit Pentium 4 system through Dell and HP. Go to the Small Business section and look at their single processor workstation desktops. I haven't been able to find just the chip though.
 
The 64Bit Pentium 4's contain the F suffix. They are starting to become available in the US. OEM system builders get them first. Dell and HP being the biggest two sellers right now.

Only the i925X and i925XE are supported with the 64Bit Pentium 4. All Prescott's are 64Bit capable in design. However, the EM64T technology can not be enabled. It was disabled at the factory during their final stages of assembly. Intel wasn't ready to start selling that functionality yet.
 
MM#: 868259
S-Spec: SL836
Product Code: BX80547PG3600EK
Description: Boxed Retail Pentium 4 560J, 3.6GHz, 800MHz FSB, 1MB L2, PRB1, E0 Stepping, Prescott Core, EM64T, HT, EDB, TM2, C1E, LGA775, 115W, 90nm, SSE3


MM#: 868261
S-Spec: SL835
Product Code: BX80547PG3400EK
Description: Boxed Retail Pentium 4 550J, 3.4GHz, 800MHz FSB, 1MB L2, PRB0, E0 Stepping, Prescott Core, EM64T, HT, EDB, TM2, C1E, LGA775, 84W, 90nm, SSE3


MM#: 868263
S-Spec: SL832
Product Code: BX80547PG3200EK
Description: Boxed Retail Pentium 4 540J, 3.2GHz, 800MHz FSB, 1MB L2, PRB0, E0 Stepping, Prescott Core, EM64T, HT, EDB, TM2, C1E, LGA775, 84W, 90nm, SSE3




The middle one seems like the best buy to me....less wattage, and the only bit of info Im not exactly sure is official is the "J" suffix. These CPUs are not on the market yet...only available to OEMs currently.
 
the 64-bit that intel produces isn't true 64-bit, is it?
that's what I've deducted from my reading, at least.

Please correct me, I want to learn... not argue.
 
Sir-Fragalot said:
The 64Bit Pentium 4's contain the F suffix. They are starting to become available in the US. OEM system builders get them first. Dell and HP being the biggest two sellers right now.
Click to expand...

You mean the J suffix. :)
 
No I mean F.

http://www.intel.com/products/desktop/processors/pentium4/index.htm

The J suffix is for the XD bit. (Execute disable). Heres a quote from the bottom of the linked page.

"The letter J indicates a processor has Execute Disable Bit capability. Enabling Execute Disable Bit functionality requires a PC with a processor with Execute Disable Bit capability and a supporting operating system. Check with your PC manufacturer on whether your system delivers Execute Disable Bit functionality."

Now it's possible that "J"s are all 64bit, and that an "F" processor, doesn't have XD and is 64bit enabled. I don't know about that one.

Intel and AMD processors are both "true" 64 bit at least in terms of code execution, however if I remember correctly they don't have all the memory registers. Meaning they can not address more than 12GB of memory. Whereas they should address a full 16GB of memory. They have 48bit memory registers or something like that.

At least that is how it was explained to me.
 
Sir-Fragalot said:
No I mean F.

http://www.intel.com/products/desktop/processors/pentium4/index.htm

The J suffix is for the XD bit. (Execute disable). Heres a quote from the bottom of the linked page.

"The letter J indicates a processor has Execute Disable Bit capability. Enabling Execute Disable Bit functionality requires a PC with a processor with Execute Disable Bit capability and a supporting operating system. Check with your PC manufacturer on whether your system delivers Execute Disable Bit functionality."

Now it's possible that "J"s are all 64bit, and that an "F" processor, doesn't have XD and is 64bit enabled. I don't know about that one.

Intel and AMD processors are both "true" 64 bit at least in terms of code execution, however if I remember correctly they don't have all the memory registers. Meaning they can not address more than 12GB of memory. Whereas they should address a full 16GB of memory. They have 48bit memory registers or something like that.

At least that is how it was explained to me.
Click to expand...

The J indicates an E0 stepping chip, which includes EDB (XD) functionality (among other improvements), but no EM64T. The F indicates a D0 chip with EM64T enabled. The rumor is that newer "J" CPUs in the future will be E0 and have EM64T enabled, but no one's sure on that.
 
ScHpAnKy said:
the 64-bit that intel produces isn't true 64-bit, is it?
that's what I've deducted from my reading, at least.

Please correct me, I want to learn... not argue.
Click to expand...

Anyone got any insight into ScHpAnKy's question above? I'd like to learn a little more about Intel 64 bit as well.

Ax
 
Perhaps Intel's Itanium is a "truer" 64-bit implementation because it has to emulate 32-bit x86 code, while in 64-bit mode it runs EPIC code flawlessly and without a performance hit. But I say, who really cares about whether something is truly this or truly that if it does best in the things you need to do.
 
DanIdentity said:
The J indicates an E0 stepping chip, which includes EDB (XD) functionality (among other improvements), but no EM64T. The F indicates a D0 chip with EM64T enabled. The rumor is that newer "J" CPUs in the future will be E0 and have EM64T enabled, but no one's sure on that.
Click to expand...

Didn't I say the same thing? I didn't comment on E0 either. All I said was that right now, according to Intel, the EM64T chips are "F" and the XD's are "J". Now Intel may have both letters affixed to a chip that has both in the future. They've done it before on such chips as the 533EB. Which denoted a Coppermine core on a 133MHz FSB.

It is possible that future "J" chips will have EM64T. Eventually I am sure all processors from Intel will have EM64T. But right now according to thier site "J'"s are NOT EM64T processors.

I haven't read this .PDF file that was linked to. If it disagrees with the page I linked to, then Intel is confusing the hell out of people.
 
Basically, it has to do with how big of numbers a processor can perform operations with. If you express a number in binary, each "digit" is a bit. Since there's two possible values for each bit--0 and 1-- numbers as big as 2^32 can be added, subtracted etc. together. 64-bit can do the same with numbers as large as 2^64.

Also, this can determine how much memory a processor can address (recognize and use).
 
xonik said:
Basically, it has to do with how big of numbers a processor can perform operations with. If you express a number in binary, each "digit" is a bit. Since there's two possible values for each bit--0 and 1-- numbers as big as 2^32 can be added, subtracted etc. together. 64-bit can do the same with numbers as large as 2^64.

Also, this can determine how much memory a processor can address (recognize and use).
Click to expand...
thankyou cause i hear lots of talk but never really knew what it really was. Like i knew there was 8, 32, 64, exc but never knew thanks :)
 
The thing about most computer technologies is that unless your job relies on it, you should just stick to the benchmarks and subjective observations. A lot of stuff sounds great theoretically, but doesn't make as much of a difference in actual tests, so it may cloud your judgment.
 
I just received an SL7L8 Retail 3.4F. It's a D0 processor with EM64T enabled and is running at 3.9ghz at the default voltage thus far on water.
 
unixadm said:
I just received an SL7L8 Retail 3.4F. It's a D0 processor with EM64T enabled and is running at 3.9ghz at the default voltage thus far on water.
Click to expand...

Where did you find it?

==>Lazn
 
mike_j_johnson said:
Guys..my post is accurate. Here is an intel pdf file that shows E0 stepping WITH the EM64T extensions:

http://developer.intel.com/design/pcn/Processors/D0104368.pdf


And it is the "J" suffix.
Click to expand...

That PDF says nothing about a J suffix, and everything I have read till now says the F suffix is for EM64T and the J suffix is for ED (or NX same thing)

In fact from Intel's own website: http://www.intel.com/products/desktop/processors/pentium4/index.htm
"The letter J indicates a processor has Execute Disable Bit capability."
and" Clock speed supporting Extended Memory 64 Technology: 3.20F, 3.40F, and 3.60F"

==>Lazn
 
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