I just installed a 2.8 prescott chip, running windows 2k pro. Windows says I have a acpi multiprocessor system. And task manager shows 2 cpu usage boxes. Any ideas why?
Phaelax 52 Practically a Posting Shark
Catweazle 140 Grandad Team Colleague
You have 'hyperthreading' enabled on the processor. That is a feature of the processor, and if you have application programs which can make use of the feature, it will improve their performance.
Phaelax 52 Practically a Posting Shark
I wasn't aware that it would show as another cpu though. Some games have small graphical glitches unless I set it for cpu0 only.
Catweazle 140 Grandad Team Colleague
heh heh.......
Thought you'd been given a bonus birthday present, didn't you?
:D
alc6379 120 Cookie... That's it Team Colleague
hehe...
I don't claim to be an Intel Expert, but isn't Hyperthreading special because the chip has dual execution units, so there's two execution units feeding data to the core, thus making the system seem like a dual system?
DMR 152 Wombat At Large Team Colleague
hehe...
I don't claim to be an Intel Expert, but isn't Hyperthreading special because the chip has dual execution units, so there's two execution units feeding data to the core, thus making the system seem like a dual system?
In a nutshell, yes- you've got it Alex.
A Hyperthreaded CPU implements 2 logical "Architectural States" which share the same physical core; the OS will see/identify each logical portion as a separate processor. In fact, if you have an OS which supports two (or more) physical processors, and each of those processors were hyperthreading, the OS would report that you have 4 (or more) processors.
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