Why do temps climb in bios?

[dmc]

I was just wondering if someone could explain this to me.
When I reboot from windows and watch my cpu temp in bios it will start out at around 95F and eventually climb to around 111F.
If I run a benchmark like 3d mark 2000 It will heat up to about 111F also. If the system is idling in bios why would it reach the same temp as when its being stressed?
Thanks
Derek

[Hoot]

If your motherboard supports "halt-on-idle", as well as your OS, then when you reach the desktop, you will see the temp fall after a few seconds. Running a stressing program starts it running again. When you interrupt the boot process and go into the bios, halt-on-idle has not been implemented yet and that is why it is not cooling down. When you are idling in the bios the amount of load on your CPU is not that much less then when it is fully stressed. Keep in mind that most stressing programs, when run from your OS (with halt-on-idle support) will benefit from the halt-on-idle even though they are allegedly not idling. On my KK266, I can enable halt-on-idle with a simple hack to the registry. When it is enabled, Prime95 Torture, set to maximum duty cycle, runs about 4C cooler than when I do not have halt-on-idle enabled, so it must be benefitting from it. You want to see your CPU stressed without benefit from halt-on-idle? Try burnk6.exe. It is a Dos app that stresses the CPU more than any Windows app I have tried. You can download it from the Utilities section on the front page. This program is from Swiftech and they know a thing or two about temps :D

Hoot

[dmc]

Thanks for explaining this to me.
How do I enable halt on idle. I am running win2k with a kt7a raid mobo

[Hoot]

With the KT7A and Windows 2k, halt-on-idle should be enabled by defautl, assuming you have ACPI enabled. It worked great in my KT7A. Note that the most recent bios revison has disabled the halt-on-idle feature in an attempt to make the KT7A more stable.

Hoot

[dmc]

I updated the bios a couple months ago so i believe I have the latest version. Can I still enable halt on idle? How do you enable acpi?
By the way your posted clock speeds are incredible I am just learning but have only been able to increase my 1333 tbird to 1507 and I have watercooling. I am going to buy some pc150 to try to increase the bus speed to 140 or so. I cant increase the multiplier past 11 or it willcrash as soon as I open any program.
Thanks alot for your help
Derek

[Hoot]

I believe any bios revision older than or equal to 3C has halt-on-idle enabled. I used YH for quite a while and had good results with it. I then went with 3C and again had good results with it. When I went to 3R, I lost halt-on-idle, so I went back to 3C. Using the W series of bios', I had problems when I wanted to enable Enhanced Chipset and 4way interleave. To enable ACPI, just make sure you have PNP OS enabled and Windows should take care of the rest.

Hoot

[parkan]

What about Windoze Me? How do I eneble it then?

[Hoot]

I am running Windows ME here and when I installed it, I did so with PNP OS enabled in the bios and hence ACPI enabled. If you installed it with ACPI disabled, I am not sure how to enable it after the fact. I believe I saw either an article or a post explaining the steps necessary to enable ACPI after the fact on a different site, but I do not recall which one. It may have been at:

http://www.icrontic.com/faq/index.php3?theme=4&level=4&question_id_select=333&chapitre_id_select=35&document_id_select=3

If you have Sandra, I believe you can determine whether you already have ACPI enabled or not. If you do, then simply install one of the CPU cooling software programs like Rain and from then on, you will have halt-on-idle enabled.

Hoot

[parkan]

Thanks!