I ran Netstat Live, msconfig, and AVG/Spybot/Adaware. No viruses No adware/spyware No extra processes running other than Win98 tasks. DMA on all disk drives are enabled. CPU not being used at all. So why is the fan speed (and CPU temp) shooting up as soon as I boot into 98? The CPU is definitely doing something, contrary to what these programs are telling me. Temperature is up to 53°C, which is the temperature it reaches only when doing something like converting DVD to divx. Tubesandwires: Win98 is on an 8GB partition, currently with 7.2GB of free space. Pentium III--Descendant of Intel Core. Pentium III-S 1400 @ 1.63GHz, 512K L2 X800XT AIW OC 580/600 2GB of RAM 250GB HD SB Audigy 2 QDI Advance 12 mobo Smugly running Vista

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Netsat Live doesn't lie. If it says the cpu is idle, it's idle. Did you install all the drivers for your mboard in Win 98 including those for the main chipset? You should always do that so that Windows has all the proper info about the mboard including the hardware monitoring chipset and the ACPI/APM support. If you haven't loaded the drivers your fan problem may be related to Windows 98 not having enough info. Naturally if the fan spins faster the CPU will cool some, and visa versa. The problem may be totally the fan control in Win 98, and the cpu temp is just affected by how fast the fan is spinning. 53 C is not execessively hot for that cpu you have - have you even looked at the temp when it's running for a while in the other operating systems? There's also the possibility Win 98 just can't handle your mboard fan control.

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"Win98 is on an 8GB partition, currently with 7.2GB of free space." Good. I've found Win 98/98SE doesn't like having less than 1gb of free space much.

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All mobo drivers are installed. To monitor CPU/HD/GFX temps, I just look at a little icon on the tray. This CPU usually idles under Win XP at only 29°C, with the fan spinning at low speed. Under Vista, it idles at 31°. It never goes above that (and the fan never speeds up) unless I'm running a video encoder or something. Then it heats up to 52-54°. Under 98, it's 'idling' (or so the program says) at 53°, and this is with the fan running full-tilt. Something's gotta be happening here! It starts off at 24° (from a cold-boot) and rapidly climbs to 52-54° when running 98. Pentium III--Descendant of Intel Core. Pentium III-S 1400 @ 1.63GHz, 512K L2 X800XT AIW OC 580/600 2GB of RAM 250GB HD SB Audigy 2 QDI Advance 12 mobo Smugly running Vista

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For testing purposes, can you remove all but 512 meg (or less) of the RAM? It seems like you've got everything covered with system.ini but still, that's a boatload of RAM for 98. It's the only thing that's atypical for 98. Is the temperature determined the same way and read with the same software in each OS? Or is the temp reading and fan speed solely a bios function? If the OS is involved perhaps the 98 setup isn't reading the temp right and is raising the fan RPM unnecessarily.

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Some software monitoring utilities do not work properly on some mboards. When your utility says the cpu is at 53, what does the reading in the bios say? What is your mboard brand and model?

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The temperature is being read with a little utility that came with the mobo (listed in my sig). This program reads the BIOS to report temperatures. Sure enough, the BIOS also reports 51-53 right after a Win98 session. The heatsink also feels quite a bit warmer. Win98 is reading the temperature right, because if I boot into XP or Vista right after running 98, the temperature still shows up as 51, and drops down to its normal 30 in about 5 minutes. The RAM is in a 1GB x 2 configuration, so I can't test it with only 512MB. :( But with only 1GB installed, I get the same behaviour. Pentium III--Descendant of Intel Core. Pentium III-S 1400 @ 1.63GHz, 512K L2 X800XT AIW OC 580/600 2GB of RAM 250GB HD SB Audigy 2 QDI Advance 12 mobo Smugly running Vista

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Try limiting memory in MSCONFIG. Easy to change back if it doesn't work.

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OK, 98 appears to be working the cpu harder even though it's 'idling'. Maybe motherboard drivers? But try limiting the RAM in msconfig as Dave01 suggsts. Or do XP and Vista power down the cpu making it seem like 98 is overworking it?

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I used msconfig to limit the memory to 128MB. The CPU's still heating up. I already have installed all motherboard drivers from the mobo CD. My other computer supports a CPU-power-down-thing called Cool'n'Quiet, but the computer in question is a Pentium III-S. I don't think that it has the ability to clock down to save power (especially since it's overclocked). I could be wrong on that, though. I'll have find out. Edit: Woah--since when did computing.net get an edit feature? My prayers have been answered. :) Pentium III--Descendant of Intel Core. Pentium III-S 1400 @ 1.63GHz, 512K L2 X800XT AIW OC 580/600 2GB of RAM 250GB HD SB Audigy 2 QDI Advance 12 mobo Smugly running Vista

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Some stuff to try. If you have flashed the bios on the mboard, the flash procedure may or may not load bios defaults, loading the CMOS settings for the new bios version. If the bios still has the old version's CMOS contents that can cause all sorts of problems. To make sure they are loaded, load Bios Defaults in the bios Setup. Take a look at settings first before you do that and jot down any you may need to change from default settings later. ..... There's an outside chance your problem could be ACPI or APM related. Win 98 and 98SE definately have problems with the ACPI support on some mboards. I had to disable ACPI support in 98SE for my Epox mboard. According to the manual for your mboard, you can disable ACPI in the bios, but if you do APM is enabled - either could cause a problem. You could try disabling ACPI in the bios but it did not help with my problems (never coming out of Standby, wake up features not working, except an external modem would wake up the computer even if all ACPI settings were off in the bios). In your bios - Power Management Setup - Enabled - ACPI enabled - Disabled - APM enabled If toggling that to APM doesn't help, try doing what I did and disable ACPI (and maybe APM) altogether - uncheck both LoadPowerProfile lines in Msconfig - Startup. If you have 98SE, get the Shutdown Supplement if you haven't already installed it - it fixes some ACPI problems. http://www.microsoft.com/windows98/... ..... Win 98 and 98SE have problems with AMD cpus faster than 350mhz, but I believe that was fixed in later Via drivers and is no longer a problem if you have the proper drivers installed. However, if you loaded drivers that were made before that was fixed, that could be related to your problem. By the the way, it is recommended you load the older version - 4.35 - NOT the latest version - of the Chipset or Platform drivers - for Win 98 and 98SE: http://www.viaarena.com/default.asp... This applies to your mboard because it was probably made in 2001 - at least your manual was - manuals are often made after the mboard is released. ...... I see nothing in your bios settings to disable the automatic cpu fan speed control, or have the fan run full speed all the time. (Maybe?) In your bios Advanced Features Dram Clock - double host clock - double host clock plus 66mhz - double host clock minus 66mhz - by SPD Dram timimg - by SPD - manual If you are overclocking the ram, try setting both of those to by SPD. .... (Unlikely) 1400mhz = 10.5 x 133.33mhz; 1627mhz = 10.5 x 155mhz?? (max overclocked FSB) You could try a higher mulitplier, lower FSB speed, or not overclocking at all.

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Oops. The problem was between Microsoft Win 98/98SE and AMD Chipsets faster then 350MHz.

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Oops? Heh - - I'd always thought the word 'edit' was not in your vocabulary (now we have proof) I'm not one of those who think Bill Gates is the devil. I simply suspect that if Microsoft ever met up with the devil, it wouldn't need an interpreter.

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I think the edit feature has only just arrived - between posts #15 & #16. It will probably be announced in either the XP or Vista forums (if it's not there already). DerekW

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Sorry I haven't replied in a couple days. My internet crashed and burned, and it took even the cable guys a long while to figure out why. But I'm up and running again. All right. I tried running without ACPI enabled (and didn't dare boot up XP or Vista while doing it lol). This didn't make a difference, so I'm back to running with ACPI enabled. I installed the shutdown supplement--no difference. I'm not running an AMD cpu, so none of that would be the problem. Tried the 4.35 version of my drivers. Again, no difference made. I'm actually running the RAM underclocked. This is DDR400 memory, and it's underclocked to 310MHz, even though the rest of the system is overclocked. So I just left the RAM settings alone, since it was already giving me stable performance under XP/Vista. The system is running very quick and stable @ 155MHz FSB--not a single crash even when spending hours encoding DVDs to Divx. But I did try running it at stock speed just to see if it would make a difference under 98. The only difference it made was that the CPU would run up to 49 degrees instead of 53. So I put the FSB back to 155. Grrr. The CPU's doing something under 98; it has to be. Pentium III--Descendant of Intel Core. Pentium III-S 1400 @ 1.63GHz, 512K L2 X800XT AIW OC 580/600 2GB of RAM 250GB HD SB Audigy 2 QDI Advance 12 mobo Smugly running Vista

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You need a program to run the HLT instructions on the cpu when it is idle. http://www.benchtest.com/downloads/... Check rain or waterfall on that page. Wow that takes me back to the good ole days ;)

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