Today, i was curious with the performance difference w/wo HT. And guess what, with HT disabled , on load Temps dropped by 2C and PWM dropped 7C. Tests were run with foldings, yeah, not the most stresstful program out there.

Anyways, no big deal, juz to point out tat, the CPU and PWM temps were affected by HT, a reduction of 2C and 7C respectively. [ as of my setup]

This post has been edited by kucingfight: Mar 27 2006, 07:37 PM

does HT equivalent to dual core tech?...
if yes, same situation happen to Pentium D..
temp drop with HT disable or i can say in single core running..

This post has been edited by newbieockids: Mar 27 2006, 11:25 PM

HT is a 'visual' cpu , it fools the OS thinking there are '2' CPUs.

DUal core on the other hand is different, there are two actual physical core exist.

Did u mean virtual CPU instead?

As kucing pointed out, they're different
With Pentium D i *guess* there'd be a bigger heat reduction by disabling 1 core

disabled HT means CPU is less occupied with data to process. Hence less work is done (less W). Tat's y u see 2C drop in yr CPU.

W = I x V, where I is the current and V is the voltage.

for a fixed vcore, if W drops, current sure drop ma. PWM is in charge of supplying current into CPU. If less current, PWM oso has less load, so temperature drop oso lor.

mmm, I've got a question here [i'm no comp engineering ,what so ever ]. How does this differ as a disabled HT would be less occupied with data to process, but at the same time, it is now 99-100% dedicated to a single process. Isn't it the load wattage drawn should be equalled? Btw it is P=VI [general term ]

@KilJim, ooppss yeah should be 'virtual' guess the exam stress has taken its toll.

This post has been edited by kucingfight: Mar 28 2006, 02:02 AM

erm... ok. it's not really appropriate but i try to use this to illustrate.

dual core has, 2 control units and 2 functional units (for add, sub, sse, logic n watever). HT system has 2 control units and only 1 functional unit.

Tat's the reason y windows can see 2 processors when u open process tab.
Actually P4 architecture cant fully utilize the functional unit. It is quite inefficient when there's one control unit only (a.k.a. no HT). The control unit #1 is pretty bz although functional unit isnt at full force working. That's where it saves some power lor. Hope u get wat i mean

This post has been edited by charge-n-go: Mar 28 2006, 02:29 AM

u r making more nonsense than senses to me
anyway i dont see the reason of disabling ht.. unless.. it'll help higher oc.. but will it?

I've heard that disabling HT creates a higher OC. But would the trade off be worth it? U would then need more processing power for multi-tasking applications and more CPU clock cycles. And in the end ur better off just buying a non-HT processor.

LOL. well, as leadaxer said it might give slight boost in clock, but totally not worth bcoz u lost the double thread processing ability

True True !

thanks for the head ups charge-n-go. Finally it made sense for the temp increase