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Computer turns on and accesses BIOS and shuts off after 10 seconds, 2 beeps when turning on

When I hit the power switch it turns on and the screen comes on to boot up. I get to access BIOS for a couple of seconds then it immediately shuts off. Also two beeps occur right after i turn it on
Hey guys, just finished building my first PC.
I have:
ASUS M5A97 R2.o Motherboard
Radeon 270 AMD 2GB GPU
CX 430 Corsair PSU
AMD 95W 6 core CPU

I unplugged the SATA cables and power to the optical drive, hardrive, and tried using one stick of RAM only it. Please help!
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More about computer turns accesses bios shuts seconds beeps turning
  1. Best answer
    Guessing an underpowered PSU, think the CX430 only runs about 385 watts continuous on the 12 volt, for a 270 I generally recommend a good 450 as bear min
  2. Try unplugging the mains and resetting the CMOS, it worked in my case.
  3. Can you get a 750W PSU?
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