i'll start with a brief description. basically i've noticed a voltage drop across the 3.3v line on my motherboard. i run the asus probe utility fairly commonly. basically its a monitoring tool. you can set tolerances and alarms.
i set my tolerances on all voltages to 5% which historically has been more than enough. well i've been getting alarms on my 3.3v line recently. they've been getting worse too, so much so that i had to raise the tolerance to 10%. 10% IS the default but this is a bad trend none the less.
right now it fluctuates between 3.072V and 3.088V at idle. just a few days ago it was closer to 3.1v
the problem seems to get worse when i run processor intensive applications such as video games.
other info: im using an antec 'true power' power supply. as i understand it all the power lines are seperate on these power supplies. it is a 330 watt power supply which should be sufficient for my system. (i think)
my 12 V and 5 V readings are perfect. in fact the 12V line is almost always dead on at 12 volts. the 5V line is usually withing 1% tolerance.
im also using a battery backup which should feed pretty constant power to my computer as i understand it.
i'll throw im my system specs now:
asus a7v8x motherboard
512 MB ddr ram samsung +
512 MB ddr ram something i forget
athlon xp 2400 (NOT overclocked)
geforce ti4400 (NOT overclocked)
SATA RAID array (2 maxtor 160 GB drives)
40x pioneer DVD (not in use during power dropoff)
asus 52x CDR (not in use during power dropoff)
SB audigy sound card
onboard gigabit lan
at this moment my system is basically idle. CPU temp is 41-42 C (@105F) and mobo temp is about 30C (86F). CPU temp rises to about 45 or 46C during peak use.
i dont do any overclocking as noted above. this applies to memory, FSB, cpu, all of it.
well im open to any facts or suggestions. could it be the hardware just breaking down? maybe i need a more powerful power supply? up until last summer i had this system setup and i didnt' have the low voltage... so maybe my power supply is just wearing out?
thanks for any suggestions!!!