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Compaq Presario C772TU Laptop RAM issue

Last Modified: 2013-11-10

I have Compaq Presario C772TU Laptop with 1 + 1 Gb RAM . Now I want to upgrade to 2 + 2 (800 FSB ) Gb . When I setup with this ram my laptop not boot. But BIOS shows 4 gb ram. But single 2 gb RAM work well.
What will be the exact solution?

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