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What is EMT64?

post #1 of 11
Thread Starter 
Im getting a dual core processor for a server im building and im confused as to what EMT64 is. Is it actuall 64-bit processing capability like AMD has or is it emulated 64-bit so it can run 64 bit programs in 32 bit mode or what?

Would I benefit from running Windows Server 2003 X64 over regular Windows Server 2003?
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post #2 of 11
It's not emulated. It's the same technology as AMD64 cause they got it in exchange for SSE3.
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post #3 of 11
Thread Starter 
Neat so Intel exchanged their SSE3 for AMDs 64-bit processing? Also what does SSE3? All I know is that it is an instruction set or something like that. Valve should release a 64-bit version of the source dedicated server.

EDIT: I found this:
The EMT64 chips are still 32 bit
chips. Intel will not have any 64 bit consumer chips until next year.
EMT64 (Extended Memory Technology 64) chips allow a P4 chip to
use the same registers that a 64 bit chip accesses, so that they can use
more than the 4GB that a non-EMT64 P4 can access. As a side advantage of
this, the chip can "execute" the x86 code, but it does so through emulation
using a 32 bit thunking layer. It does not run the 64 bit OS as a 64 bit
OS, but as a thunked OS. This is slow and clumsy at best. The point I am
trying to make is that the EMT64 bit chips *ARE NOT* 64 bit chips. They are
able to use certain functions of the x86 extensions that allow it to access
the same registers, but that is all. It is *NOT* a 64 bit chip, not will it
ever be. Intel has announced that it *WILL* produce 64 bit chips next year.
I want those who are considering buying a 64 bit computer to understand that
while the EMT64 can emulate execution of the code, it is *NOT* a 64 bit
chip. Never was, never will be.
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post #4 of 11
http://www.intel.com/support/process.../cs-001650.htm

It doesn't really go much into it, but there is this:

Quote:
Originally Posted by Intel's website
The launch of 90 nm process-based Pentium 4 processor introduces the Streaming SIMD Extensions 3 (SSE3), which includes 13 additional SIMD instructions over SSE2. The 13 new instructions in SSE3 are primarily designed to improve thread synchronization and specific application areas such as media and gaming.
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post #5 of 11
Last I heard AMD was using 64 bit emulation as well, but why do I have the feeling that AMD does it better?
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post #6 of 11
Thread Starter 
So AMD and Intels processors use emulated and not true 64-bit ???

Thats really really stupid
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post #7 of 11
EM64T, Intel Extended Memory 64 Technology allows the system to address 8GB of memory with a compatiable 64 bit operating system, it can use more depending on the sistuation. It also allows the execution of 64 bit data, as it is then able to understand and address it all.

There was a lot of talk about this on the forum a while ago but we did conclude that it was indeed emulating the extensions as the processors are still based on the IA-32 architecture, not the IA-64 architecture which is true 64 bit. More evidence is that with 64 bit instructions the processor slows down with AMD64 and EM64T. With a true 64 bit processor it would not as it can execute all 64 bits of data, thus speeding up the processing of whatever it is calculating/processing.
post #8 of 11
Quote:
Originally Posted by The_Manual
EM64T, Intel Extended Memory 64 Technology allows the system to address 8GB of memory with a compatiable 64 bit operating system, it can use more depending on the sistuation. It also allows the execution of 64 bit data, as it is then able to understand and address it all.

There was a lot of talk about this on the forum a while ago but we did conclude that it was indeed emulating the extensions as the processors are still based on the IA-32 architecture, not the IA-64 architecture which is true 64 bit. More evidence is that with 64 bit instructions the processor slows down with AMD64 and EM64T. With a true 64 bit processor it would not as it can execute all 64 bits of data, thus speeding up the processing of whatever it is calculating/processing.


So whats with all this talk of xp 64 being so much more faster than xp pro?
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post #9 of 11
Quote:
Originally Posted by Sun
Last I heard AMD was using 64 bit emulation as well, but why do I have the feeling that AMD does it better?
probably cuz thats UR OPINION!
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post #10 of 11
Windows XP x64 is a operating system though and does not require heavy calculations and processing for most of its tasks. Granted it will be faster but it will be even faster with a full IA-64 processor
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