asus a7v 133power supply fan sensor

[Gruv2ths]

Hello,
I am working on a buddies Comp. It has a ASUS A7V133 with a 1200 proc, 300Mb ram (PC 133) Ect.

It had 64Mb (PC133) of ram and i added 256Mb(PC133). I noticed before i added it that the BIOS had mislabeled the proc as a 900Mhz and the ram clock was set to PC 100. When i did so it began locking up intermittently. The Power light, HDD light and fans come on and it never recovers. In time it will reboot, and the bios will say that the clocks are set to 'safe mode'. I reset the clocks and in time it locks up again. So i upgraded the BIOS and it now correctly labels the ram and the proc, but the freezing continues. I installed the latest rev. of ASUS Probe, and it is saying that the P/S fan is slow, and there is a alarm sound. Dose the P/S have a telemetry lead on the ATX power supply connector? Could it be that it locks up when it gets warm, and wont let me reboot until it cools? What will the MoBo do if it detects a over-temp?
Any help would be great!!
-Stephen

[Bovon]

Welcome to TechIMO

Are you sure the RAM is compatible with 1) the motherboard and 2) the older stick of ram?..i.e., surely one is not unbuffered, non parity SDRAM and the other is ECC or Registered. Recheck the ram, use only one new module to begin with..it that works, add another..finally, add the original 64 mb module in.

All boards that I am aware of detect the CPU and sets the Vcore, then it runs it at 100 Mhz FSB at first..the user must go into the BIOS and reset it to 133Mhz..being very sure to note the multiplier settings. If (say for instance) the CPU is detected at 1.2 Ghz at 100 MHz FSB and the user changes the FSB to 133 MHz, but does not change the multiplier..which would have been at 12. If the multiplier is allowed to remain at 12, and the FSB is changed to 133..the result is 1596 MHz. Probably way too much overclock for a 1200 MHz CPU.

I donno what to say about the fan speed detection...most motherboards today detect if a fan is attached, but that's all I think. They will shut down if the CPU overheats or no fan is detected.