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RAM suddenly given up

post #1 of 2
Thread Starter 
Hi chaps,

What would cause RAM to suddenly go bad? Computer has been working fine for months then suddenly it wouldn't POST. Took both sticks of RAM out and reseated, still no POST. Reset overclocked settings, still no POST. Took out one stick leaving just one in in first slot.

This now works......

What does it mean?

Ta
Will
Black Pearl
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon II x4 640 Asus M4A87TD EVGA GTX460 4GB G-Skill 1600 7-7-7-24 
Hard DriveOSPowerCase
60GB Agility SSD, 1TB Seagate 7200.11 Windows Ultimate 64 bit Corsair AX750 Fractal Design Black Pearl 
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Black Pearl
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon II x4 640 Asus M4A87TD EVGA GTX460 4GB G-Skill 1600 7-7-7-24 
Hard DriveOSPowerCase
60GB Agility SSD, 1TB Seagate 7200.11 Windows Ultimate 64 bit Corsair AX750 Fractal Design Black Pearl 
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Reply
post #2 of 2
It could mean you need to try the RAM in another computer to verify that it's actually at fault because what you describe could be caused by something else, like a bad power supply, because if even one voltage from the PSU fails, the motherboard won't work but can still make fans and disk drives run. Don't buy a PSU tester to check it because the cheap ones do a poor job, and the expensive ones with digital readouts cost more than a more versatile and accurate digital multimeter.

Sometimes a marginal short between the motherboard and case reveals itself after the parts have shifted over time. These usually happen around the mounting holes (inspect around brass standoffs underneath and screws on top) or at a corner (cases and motherboards can flex a lot; adding stick-on rubber bumper feet to the case to prevent motherboard contact can prevent shorts).

Motherboards can go bad, usually when a capacitor rots (may bulge or leak, or may look perfectly normal) in one of its voltage regulators, but sometimes a MOSFET shorts instead. There are usually 3 voltage regulators, a big, elaborate one for the CPU, another for the PCI-E slots, and one for the memory slots. http://www.BadCaps.net has tons of information about this in their forums.
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