i7 920 can get 8cores with HT enabled

[romulan]

i7 920 cant get 8cores with HT enabled

ive got an i7 920, on a 21 multiplier averclocked to 4.1GHZ with HT enabled.
problem is only 4 cores showing in cpu-z and everest.
when i was running stock speeds, 8 cores were showing but since my overclock, i only have 4.
anyone know why?
my board is a p6t deluxe v2.

thanks in advance.

ade

 

[FreeStream]

What does Task Manager show?

CPU-Z should show 4 cores, 8 threads...

 

[romulan]

shows 4 cores, 4 threads

 

[Ritsugamesh]

Try dropping your o/c until you find out when HT comes back into play. It might be a bugged chipset or any manner of things, slightly too low voltages/inadequate psu.

Another thing to check is if you have disabled Turbo o/cing in your BIOS; I've read in reviews that the i7 series, [the 920 specifically in this case] stopped being able to function turbo o/cing effectively after 3.3GHz or so. Whether HT could be linked in some way to this I am unsure.

As said I'd try lowering your clock incrementally until you find when HT threads show back up in CPU-Z.

 

[mmj_uk]

Strange one, are you sure you didn't disable hyperthreading? I've heard of cores dropping out but not Hyperthreading.

What's the highest clockspeed you can go before this starts happening?

 

[romulan]

hyperthreading definatelt enabled, will run some tests tonight and see if i can find out at which point i lose hyperthreading.
my psu is an antec cp-850w

 

[BigBruiserAl]

type msconfig in the run command and adjust the the amount cpu

 

[reflux]

type msconfig in the run command and adjust the the amount cpu

The CPU setup in MSConfig should be left as default.

 

[JonJ678]

By far the most likely explanation is that you've turned off hyperthreading without realizing, or that you're asking software which counts physical cores rather than threads.

 

[BigBruiserAl]

The CPU setup in MSConfig should be left as default.

Sorry i should have explained a bit more...for some unknown reason mine was set to four when i built my rig...had to set it back to default to show all 8 used msconfig after googleing it worked a treat

 

[romulan]

checked bios and HT definately enabled.
also reset bios to factory defaults and everest and cpu-z still show 4 cores/4 threads.
help!!!!!

 

[mmj_uk]

checked bios and HT definately enabled.
also reset bios to factory defaults and everest and cpu-z still show 4 cores/4 threads.
help!!!!!

Even at stock speeds?

 

[reflux]

Sorry i should have explained a bit more...for some unknown reason mine was set to four when i built my rig...had to set it back to default to show all 8 used msconfig after googleing it worked a treat

Ah I see

 

[romulan]

thanks for the help guys, i re-stalled windows and now 8 cores showing again.

cheers

 

[OLDPHART]

Hi m8 you got yout self mixed up i7 spec = 4 cores / 8 threads, so CPU-Z should show - processors 1 > cores 4 > threads 8, in Device manager> processors> shows as intel core, but when you count them you have 8, easy to get mixed up between cores and threads.