RAM upgrade makes the PC not start

Hello,

I recently bought a RAM upgrade to my PC and suddenly it doesnt want to power up. It lights on and shuts back down after like 5secs and never boots.

My setup:
Asus P6T Deluxe
Core i7 920
Gainward HD 4870x2
1x3 3GB 1066MHz RAM - went to 2x3 6GB 1333MHz
1000W PSU
Antec 1200

After i replaced it with the default RAM i had before, it started just fine. What may be wrong? I really want to upgrade that ram because i went from 32bit to 64bit and 3GB is kinda bottleneck.

Thanks
6 answers Last reply
More about upgrade makes start
  1. this board use triple channel memory check if the one you bought is on the qvl list and will work with the first one you already have .
  2. somehow it got fixed, for no apparent reason. Im happy though
  3. how did you fix it post the answer it could help others with the same issue .
  4. actually i just removed it and installed back, that seemed to work. nothing more
  5. maybe there was one stick that was not well seated in the motherboard slot .
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