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Stupid Question about AMD X2

Locut0s

Locut0s

Lifer
Hopefully this isn't going to sound too stupid but here goes. I know that the new dual core processors from both AMD and Intel are essentially just two lower clocked cores stuck together and that the main benefit one gets from running these CPUs is in heavilly multitasking environments. Question is though does the OS see the CPU as "dual cores" or is this transparent to the software? Does the hardware take care of dolling out different threads to each core? I know in a true dual processor setting the OS can not only see both processors but can deligate different applications to run on each processor. I'm guessing this is not the case with the new dual core CPUs though.
 
OS will try to run 2 apps whenever possible. Single apps will not use 2 cores unless they are multi-threaded. That it is writen to run on 2 cores.
 
The OS sees two physical cores, and not just two virtual cores as with an HT-enabled P4.
I believe, however, Windows XP Pro is required to make use of dual cores - XP Home can only use two virtual cores.

The Operating System deals with threads, using its scheduler.
When you enable HT on a P4 for example, XP sees two virtual cores and sends two threads for simultaneous execution.


 
Originally posted by: Bowsky
I think Windows XP Home does recognize dual cores, just not dual processors.
Click to expand...

im no expert on this but wouldn't the windows scheduler, just treat dual core the same as dual proc, since you would have "core 0/Proc 0" and "core 1/proc 1" the same thing no? just two physical sockets instead of one, and two physical cores for both dual core and dual proc, since the BIOS stipulates the differences to the OS.

I would think these would be the same?
 
You need to verify both core are correctly being recognised by running bechmarks on know good reslts. F@H is perfect for this, but there are other ways. I had to go thru multiple iterations to get mine right on my abit board.
 
Originally posted by: Hacp
I heard that you can run dual core in 2000.
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yeah probs "server 2000 advanced", but i doubt the normal Workstation OS windows 2000 prof would see both cores .. as they were bought up in the Pentium 2/3 era
 
Here is how Windows XP Home vs Pro works.

XP Home supports 1 Physical processor, with NO limit on the cores. XP Pro supports 2 Physical processors, each one having no limit on the cores.

XP Home will support a P4 with HT(showing up as two cores) an Athlon 64 X2(showing up as two cores) a Pentium D(showing up as two cores) and a Pentium D EE(showing up as 4 cores). XP Home supports all of what I just mentioned. As long as there is one processor in ONE socket, it matters not how many cores are in the processor.

XP Pro would likewise support dual dual-core xeons with HT should they come about making full use of the 8 threads available.
 
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