CPU two cores or one core
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From: Gabriel Knight on 19 Jan 2010 04:20 Hi all I have this CPU here : http://www.cpu-world.com/sspec/SL/SL7Z9.html I have installed one in a pc before and it came up as a two core, as in when I look in "task manager" then "performance" there are two cubes for the "CPU Usage History"... Is this CPU a Dual Core? as far as I know its a P4 single core CPU. Thanks GK
From: DerekBaker on 19 Jan 2010 05:30 On 19/01/2010 09:20, Gabriel Knight wrote: > Hi all > > I have this CPU here : > > http://www.cpu-world.com/sspec/SL/SL7Z9.html > > I have installed one in a pc before and it came up as a two core, as in when > I look in "task manager" then "performance" there are two cubes for the "CPU > Usage History"... Is this CPU a Dual Core? as far as I know its a P4 single > core CPU. > > Thanks > GK > > http://en.wikipedia.org/wiki/HyperThreading -- Derek
From: TVeblen on 19 Jan 2010 07:09 On 1/19/2010 4:20 AM, Gabriel Knight wrote: > Hi all > > I have this CPU here : > > http://www.cpu-world.com/sspec/SL/SL7Z9.html > > I have installed one in a pc before and it came up as a two core, as in when > I look in "task manager" then "performance" there are two cubes for the "CPU > Usage History"... Is this CPU a Dual Core? as far as I know its a P4 single > core CPU. > > Thanks > GK > > You don't say what P4 processor you are using, but most Pentium 4 processors are dual core: 2 processor cores on one die. The OS sees it as 2 processors because that is how it can utilize it.
From: Ian D on 19 Jan 2010 10:50 "TVeblen" <Killtherobots(a)hal.net> wrote in message news:hj47ea$vum$1(a)news.eternal-september.org... > On 1/19/2010 4:20 AM, Gabriel Knight wrote: >> Hi all >> >> I have this CPU here : >> >> http://www.cpu-world.com/sspec/SL/SL7Z9.html >> >> I have installed one in a pc before and it came up as a two core, as in >> when >> I look in "task manager" then "performance" there are two cubes for the >> "CPU >> Usage History"... Is this CPU a Dual Core? as far as I know its a P4 >> single >> core CPU. >> >> Thanks >> GK >> >> > You don't say what P4 processor you are using, but most Pentium 4 > processors are dual core: 2 processor cores on one die. The OS sees it as > 2 processors because that is how it can utilize it. P4s only have single cores. Pentium Ds are dual core. Starting with the Prescott series, P4s have hyperthreading, (HT). There is one physical core and a virtual core. This appears as 2 CPUs in Task Manager. For an OS and apps that can utilize HT, this allows for more efficient thread scheduling as there are 2 processing paths, although the individual threads are still processed sequentially. In a true multicore CPU the threads can be processed simultaneously.
From: TVeblen on 19 Jan 2010 17:36
On 1/19/2010 10:50 AM, Ian D wrote: > "TVeblen"<Killtherobots(a)hal.net> wrote in message > news:hj47ea$vum$1(a)news.eternal-september.org... >> On 1/19/2010 4:20 AM, Gabriel Knight wrote: >>> Hi all >>> >>> I have this CPU here : >>> >>> http://www.cpu-world.com/sspec/SL/SL7Z9.html >>> >>> I have installed one in a pc before and it came up as a two core, as in >>> when >>> I look in "task manager" then "performance" there are two cubes for the >>> "CPU >>> Usage History"... Is this CPU a Dual Core? as far as I know its a P4 >>> single >>> core CPU. >>> >>> Thanks >>> GK >>> >>> >> You don't say what P4 processor you are using, but most Pentium 4 >> processors are dual core: 2 processor cores on one die. The OS sees it as >> 2 processors because that is how it can utilize it. > > P4s only have single cores. Pentium Ds are dual core. Starting with > the Prescott series, P4s have hyperthreading, (HT). There is one > physical core and a virtual core. This appears as 2 CPUs in Task > Manager. For an OS and apps that can utilize HT, this allows for > more efficient thread scheduling as there are 2 processing paths, > although the individual threads are still processed sequentially. > In a true multicore CPU the threads can be processed simultaneously. > I think you are right, but this article: http://en.wikipedia.org/wiki/Pentium_Dual-Core Is what I was thinking of. I should have said "some" and not "most". I've got a Wolfdale box kicking around here. |