Waldmark
07-07-02, 01:48 PM
I set up my new system last night:
Pentium 1.8A
Asus P4S533
Antec 1080 case w/ 430 PS
Delta 68CFM fan on a 5 watt rheostat
The mobo is set for jumperless mode; the Vcore voltage jumper is set to allow 1.7V. CPU speed in the BIOS is set at 2400, 4:5 memory divider. The Delta's 4-pin Molex is plugged into the PS and the 3-pin connector to the CPU's RPM monitor. Now the fun part.
I originally set the Vcore at 1.7V in the BIOS. When I booted, I got a Hardware Management error. Hardware Manager showed a Vcore ranging from 1.69 to 1.72 volts. Apparently, anything over 1.70 shows as out-of-range and generates an error. I could not tolerate the Delta's noise at 9V, so I connected the Antec blowhole fan to the 5W rheostat. This knocked the Delta's voltage down to about 8.2V. However, the mobo's RPM indicator became unstable and the VCore went to 1.82V (but stable).
I decided to drop the BIOS Vcore to 1.5V and set the mobo jumber to 1.5V. The Hardware Manager would not show a Vcore voltage drop until I disconnected the Antec fan from the rheostat, and turned off the computer AND the power strip. Now I was able to boot to W98 with a stable Vcore of 1.52V and stable RPM monitor.
I then put the mobo jumper back to 1.7V and set the BIOS Vcore for 1.65V; and got a stable 1.61V. I reattached the Antec fan to the rheostat and still got 1.61V. I powered down and let everything cool off. When I rebooted, the Vcore was at 1.76V.
Currently, I set the BIOS Vcore for 1.55V and the mobo is now back to a stable 1.61V to 1.63V, with the Antec fan attached.
Is the Hardware Manager monitor off the wall?
Is there some Asus bug I'm not considering?
Is there a rational explanation for the Vcore changing when I plug another fan into the rheostat, which in turn is connected directly to the power supply?
BTW, Vcore does fluctuate in a 0.03V range, the +3.3V is stable at 3.26, the +5V at 4.97 and the 12V at 11.9V.
I appreciate any help.
Pentium 1.8A
Asus P4S533
Antec 1080 case w/ 430 PS
Delta 68CFM fan on a 5 watt rheostat
The mobo is set for jumperless mode; the Vcore voltage jumper is set to allow 1.7V. CPU speed in the BIOS is set at 2400, 4:5 memory divider. The Delta's 4-pin Molex is plugged into the PS and the 3-pin connector to the CPU's RPM monitor. Now the fun part.
I originally set the Vcore at 1.7V in the BIOS. When I booted, I got a Hardware Management error. Hardware Manager showed a Vcore ranging from 1.69 to 1.72 volts. Apparently, anything over 1.70 shows as out-of-range and generates an error. I could not tolerate the Delta's noise at 9V, so I connected the Antec blowhole fan to the 5W rheostat. This knocked the Delta's voltage down to about 8.2V. However, the mobo's RPM indicator became unstable and the VCore went to 1.82V (but stable).
I decided to drop the BIOS Vcore to 1.5V and set the mobo jumber to 1.5V. The Hardware Manager would not show a Vcore voltage drop until I disconnected the Antec fan from the rheostat, and turned off the computer AND the power strip. Now I was able to boot to W98 with a stable Vcore of 1.52V and stable RPM monitor.
I then put the mobo jumper back to 1.7V and set the BIOS Vcore for 1.65V; and got a stable 1.61V. I reattached the Antec fan to the rheostat and still got 1.61V. I powered down and let everything cool off. When I rebooted, the Vcore was at 1.76V.
Currently, I set the BIOS Vcore for 1.55V and the mobo is now back to a stable 1.61V to 1.63V, with the Antec fan attached.
Is the Hardware Manager monitor off the wall?
Is there some Asus bug I'm not considering?
Is there a rational explanation for the Vcore changing when I plug another fan into the rheostat, which in turn is connected directly to the power supply?
BTW, Vcore does fluctuate in a 0.03V range, the +3.3V is stable at 3.26, the +5V at 4.97 and the 12V at 11.9V.
I appreciate any help.