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Replacing Laptop Power Supply Wattage?

Hi!
I have an Asus G73J Series laptop but my power supply is causing random, sporadic crashes of my computer. I need to get it replaced, and I was wondering if someone could help me determine the wattage I need to have on my new power supply to run my machine. I need to run some pretty intensive stuff on it so I need a reliable, effective power source.

Specs:
Intel i7 CPU
ATI Mobility Radeon HD5870 GPU; 1 Gb VRAM
8 GB DDR2 RAM memory
500+500 GB HDD (2 500 gig hard drives)
Bluray/DVDRw optical drive
Running Windows 7 Premium.
4 answers Last reply Best Answer
More about replacing laptop power supply wattage
  1. Best answer
    All the specs should be in the power supply it self

    Should list output voltage and amperage

    so Amperage X Voltage = wattage

    So my old Compaq one has 18.5 volts @ 6.5 amps = 120.25 watts.
  2. See if you can get a replacement power brick from ASUS. You may have 2 year warranty and the laptop is still under warranty cover.
  3. thanks guys, really appreciate it. I dont really know much about hardware so i'm gald you can give me some advice:)
  4. Best answer selected by shifty419.
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