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what's CPU Halt Command Detection?

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Nights_L   07-18-2003 at 06:55:07 AM

As the subject mentioned..
what's "CPU Halt Command Detection" ?
this option is in the latest version of Bios that I updated..
I just noticed it today, and I wonder what's this, the option I have are Enable and Disable
which one I should use?

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Nights_L   07-18-2003 at 07:31:50 AM
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ok..I did a little research after posting it..
I guess it's a way to keep CPU cooler, but there would be some instability issue..or sometimes.
do you guys like it?
what are the experience you have with this?
and..do you recommend to enable this?

Reply to Nights_L
markgun   07-18-2003 at 07:52:17 AM
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I had it on all the time for my now being replaced MSI KT3 Ultra. It lowered the idle temperature about 10C. No stability issues whatsoever.

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Nights_L   07-18-2003 at 08:24:37 AM
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mine is a KT3 Ultra2..
you are replacing your board? what are you taking then?

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3lIOns   07-18-2003 at 12:28:53 PM
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interesting question :)

the halt command shuts down parts of the cpu while it is idle, this reduces power useage and therefore temperature of the cpu.

In the old days two programs called rain(extreme) and waterfall(not so extreme) were used to do this.

This shouldnt slow the cpu down much, and happens on a microsecond scale. If u run seti or something that uses the cpu 100% there is not much point in having it on, but it u frequently leave the computer idle then enable it to cool the cpu.

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markgun   07-18-2003 at 04:51:36 PM
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Quote :

mine is a KT3 Ultra2..
you are replacing your board? what are you taking then?


Well, I had some loose DIMM retention clips and they're the most annoying thing. If I work inside my case and bump a stick of memory, it takes like 10 tries to get it reseated perfectly. SO I ordered an nForce2 board and RMAed the KT3 Ultra (My warranty expires July 31st). If they send back a brand new one (probably unlikely) I'll just try to sell it. Aside from that it was a fanastic board.

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Nights_L   07-18-2003 at 05:08:37 PM
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hm..so MSI Cooler XP (the cooling program that came with my mobo) based on the same idea I guess
the interesting thing is, while the program is cooling cpu, or the CPU Halt Command Detection is enabled, the Voltage of the CPU will keep jumping from 1.70V to 1.80V, although mine is Palomino XP2000+, if the above cooling ways aren't enabled, it stays to 1.74-1.76V (1.75V)
I just wonder that the jumping of the voltage..would it hurt?

Quote :

loose DIMM retention clips and they're the most annoying thing


hm..that's really weird, but I see it's a really annoying problem, anyway, glad you are buying a nForce2 board, man, now i'm jealous~ :tongue:

Reply to Nights_L
smitbret   07-18-2003 at 06:08:19 PM
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I used it on my old Shuttle AK31 board with an Athlon T-bird. It cooled my idle temps about 15 degrees. It will work, if your board has that option available. I've heard that the increased wear and tear from revving up and down decreases CPU life, though, so I don't use it anymore.
-Brett

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markgun   07-18-2003 at 06:31:22 PM
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I've had the nForce2 board for a little over a week! And the clips are actually secure :eek: .

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Nights_L   07-18-2003 at 06:52:55 PM
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hmm...now it's getting complicated, we used it to keep cpu cooler, thus increase cpu's life. BUT it decreases the cpu life at same time?
aie..now what? so should I enable or disable?

Reply to Nights_L
pIII_Man   07-18-2003 at 07:32:51 PM
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IMO cpu's do not die from idleing...just leave it dissabled...if it droped the load temp that would be one thing but as long as your cpu is idling in the mid 40's or less don't bother.

There is no smell better than fried silicon :evil:

Reply to pIII_Man
smitbret   07-18-2003 at 07:49:00 PM
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Like I said, I don't have any proof that it shortens the CPU lifespan. It's just what I was told on this forum a year or so ago.
-Brett

Reply to smitbret
Nights_L   07-18-2003 at 08:54:58 PM
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But my cpu is ONLY idling in the mid 40's with that option "enabled"
when it's disabled, the cpu idling temperature is ~55C..

Reply to Nights_L
smitbret   07-18-2003 at 09:46:24 PM
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That is high. Although, I used to have an Athlon 1.4GHz on a Gigabyte board that would run about 55 degrees at idle and 62 degrees under load. In that case it might not be a bad idea to use CPU Command Halt Detection, although it won't make a bit of difference when the processor is put under load.
-Brett

Reply to smitbret
Nights_L   07-18-2003 at 10:26:28 PM
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nope, it makes no difference under load, but I mean..80% of time my computer isn't doing sth intensive, I do play game, but not that often..
I guess then it's a better idea for me to enable it then..

Reply to Nights_L
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