9JCS Hyperthreading not working

Kerry · 20th March 2004, 21:17

I just discovered that Hyperthreading isn't working on my new with Chaintech 9CJS rig. Even though, on boot, it reads, Hyperthreading enabled.

My Windows Task Manager, Performance, only shows one CPU. Control Panel, System, Hardware, Devices, Processor, only shows one processor, however under Computer it reads ACPI MultiProcessor PC.

In Windows Task Manager, Performance, it only shows one processor.

Any tricks to getting this working correctly?

Thanks,

Kerry
XP Home

piotke · 20th March 2004, 21:19

Was HT enabled while installing Windows ? I tought it should be.

Kerry · 20th March 2004, 21:48

Yes. I recall that the boot screen was set for default hyperthreading enabled. I recall being relived to see that I didn't have tp do anything. Then I installed XP Home.

Thanks,

Kerry

jmke · 21st March 2004, 01:24

"Then I installed XP Home"

XP home doesn't support dual cpu systems, install XP Pro

Kerry · 21st March 2004, 01:54

Arg, mo money :

Would I notice much of a performance difference if I don't have any dual processor specific applications?

Thanks

Kerry

jmke · 21st March 2004, 11:05

There is a performance difference when you are multitasking a lot, meaning that no single application will be speedier then before, but if you use a lot of programs at the same time you will notice a speed increase over the single CPU setup. It won't we earth shattering, but quite noticable none the less. it speeds up day to day usage of the PC (encoding, file extracting, browsing, gaming, .. all at the same time at a faster pace then the none-HT system)

Kerry · 21st March 2004, 17:37

Thanks, I discovered that somehow hyperthreading had become disabled. Via, BIOS setting I enabled it and voila, I now have the two CPU Usage History graphs in Windows Task Manager, Performance.

Thanks,

Kerry

jmke · 21st March 2004, 17:43

hmm weird, Home XP doesn't support fully fledged dual CPU systems, guess it sees the HT enabled CPU as one?

should have done a bit of research before replying here

http://www.intel.com/support/platform/ht/os.htm

I blame the lack of sleep

20th March 2004, 21:17	#1
Kerry Member Join Date: Feb 2004 Posts: 155	9JCS Hyperthreading not working I just discovered that Hyperthreading isn't working on my new with Chaintech 9CJS rig. Even though, on boot, it reads, Hyperthreading enabled. My Windows Task Manager, Performance, only shows one CPU. Control Panel, System, Hardware, Devices, Processor, only shows one processor, however under Computer it reads ACPI MultiProcessor PC. In Windows Task Manager, Performance, it only shows one processor. Any tricks to getting this working correctly? Thanks, Kerry XP Home

20th March 2004, 21:19	#2
piotke [M] Reviewer Join Date: Jun 2002 Posts: 4,997	Was HT enabled while installing Windows ? I tought it should be. __________________ .

20th March 2004, 21:48	#3
Kerry Member Join Date: Feb 2004 Posts: 155	Yes. I recall that the boot screen was set for default hyperthreading enabled. I recall being relived to see that I didn't have tp do anything. Then I installed XP Home. Thanks, Kerry __________________ Kerrith H. (Kerry) King Communication Skills Tutorial for Managers

21st March 2004, 01:24	#4
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 78,416	"Then I installed XP Home" XP home doesn't support dual cpu systems, install XP Pro __________________

21st March 2004, 01:54	#5
Kerry Member Join Date: Feb 2004 Posts: 155	Arg, mo money : Would I notice much of a performance difference if I don't have any dual processor specific applications? Thanks Kerry __________________ Kerrith H. (Kerry) King Communication Skills Tutorial for Managers

21st March 2004, 11:05	#6
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 78,416	There is a performance difference when you are multitasking a lot, meaning that no single application will be speedier then before, but if you use a lot of programs at the same time you will notice a speed increase over the single CPU setup. It won't we earth shattering, but quite noticable none the less. it speeds up day to day usage of the PC (encoding, file extracting, browsing, gaming, .. all at the same time at a faster pace then the none-HT system) __________________

21st March 2004, 17:37	#7
Kerry Member Join Date: Feb 2004 Posts: 155	Thanks, I discovered that somehow hyperthreading had become disabled. Via, BIOS setting I enabled it and voila, I now have the two CPU Usage History graphs in Windows Task Manager, Performance. Thanks, Kerry __________________ Kerrith H. (Kerry) King Communication Skills Tutorial for Managers

21st March 2004, 17:43	#8
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 78,416	hmm weird, Home XP doesn't support fully fledged dual CPU systems, guess it sees the HT enabled CPU as one? should have done a bit of research before replying here http://www.intel.com/support/platform/ht/os.htm I blame the lack of sleep __________________

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