X86 vs X86-64
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X86 vs X86-64
Hey, very simple post. I came about X86 and X86-64. To me the 64 would mean 64Bit?
But under X86-64 it had things like P4 extreme and Pentium D's. Pentium D's are dual cores i think (i dont keep upto date with computers these days), so is a dual core intel classed as X86-64?
I have a Intel Centrino Core Duo, i am guessing this is just X86, but core duo is part of the D range i think, dual core, so is it X86-64?
Please unconfuse me...
But under X86-64 it had things like P4 extreme and Pentium D's. Pentium D's are dual cores i think (i dont keep upto date with computers these days), so is a dual core intel classed as X86-64?
I have a Intel Centrino Core Duo, i am guessing this is just X86, but core duo is part of the D range i think, dual core, so is it X86-64?
Please unconfuse me...
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32 bit is 32 bit, 64 bit is 64 bit.
Whether it's single core or dual core or hyperthreading or whatever is orthogonal to that.
To understand what a particular chip does, look it up on the manufacturer's web site.
Whether it's single core or dual core or hyperthreading or whatever is orthogonal to that.
To understand what a particular chip does, look it up on the manufacturer's web site.
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I think all these chips do run the basic 8086 code though.
That's where AMD stole the market share from Intel: maintaining backward compatibility with 80x86 opcodes. Intel tried to go in a different direction, but as soon as you can't run good ole Windoze (especially the bootleg copies that most of the world is running) you consign yourself to a very niche market (commercial servers, basically).
That's where AMD stole the market share from Intel: maintaining backward compatibility with 80x86 opcodes. Intel tried to go in a different direction, but as soon as you can't run good ole Windoze (especially the bootleg copies that most of the world is running) you consign yourself to a very niche market (commercial servers, basically).
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Good question - what you ask is not easily answered! Even Intel is (possibly deliberately) vague about what the answer is.
Does Intel do 64-bit?
Not always so - some processors can be either 32 OR 64-bit depending on what OS is running on it! If you boot up a 32-bit OS, the processor will operate in 32-bit mode only and will NOT run any 64-bit code. You can boot the SAME processor with a 64-bit version of the OS and it will run BOTH 32 AND 64 bit code.
IO540, it wasn't the backwards compatability that allowed AMD to leapfrog intel - it was that AMD could sell a 64-bit processor that also ran 32-bit code as fast as (or faster than) a 32-bit processor.
At the time, intel's 64-bit offerings (think Itanium cores) ran 32-bit code like treacle.
There was never any question of intel 64-bit CPUs not running mainstream COTS OS and applications, just that they weren't particularly good at running 32-bit code - and there was little native 64-bit code around for them to show how good they were at that!
Intel has more than caught up with AMD - it has passed it by with its dual-core CPUs running faster and (crucially) significantly cooler, hence lower running and cooling costs.
SD
Good question - what you ask is not easily answered! Even Intel is (possibly deliberately) vague about what the answer is.
Does Intel do 64-bit?
32 bit is 32 bit, 64 bit is 64 bit.
IO540, it wasn't the backwards compatability that allowed AMD to leapfrog intel - it was that AMD could sell a 64-bit processor that also ran 32-bit code as fast as (or faster than) a 32-bit processor.
At the time, intel's 64-bit offerings (think Itanium cores) ran 32-bit code like treacle.
There was never any question of intel 64-bit CPUs not running mainstream COTS OS and applications, just that they weren't particularly good at running 32-bit code - and there was little native 64-bit code around for them to show how good they were at that!
Intel has more than caught up with AMD - it has passed it by with its dual-core CPUs running faster and (crucially) significantly cooler, hence lower running and cooling costs.
SD
