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Upgrading MSi GT70 20D PSU for OC purpose


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Hello, I'm the new member in T|I.. I've flash my vbios to OC edition GTX780M vbios... using the 335.23 nvidia drivers (custom .inf).. as I push the value to more than +140 on core and +120 on memory, the screen will freezes and crash during benchmarks (early point of benchmark).. anyone know the problem? could this cause by the lack power? as I'm using the 180w stock PSU.. and moreover I can enable the hybrid power on my laptop but it doesn't help at all.. I was considering upgrading the PSU to 240W but do I need to flash a custom BIOS too? please help.. TQ~

Sustem information:

MSi GT70 20D Dragon Edition 2

Processor i-7 4700M

8Gb Ram

Nvidia GTX780M 4gb ram (unlocked vbios)

stock BIOS

overclocking software (nvidia inspector)

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