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RE: Is New Vostro 15 3000 (3568) Core i3-7100U Processor 4GB(4GB×1)DDR4-SDRAM Memory 128GB SSD faster to edit video/audio

For video editing, this system is by far underpowered -- you really need a Precision mobile workstation or an Alienware system for that.  If you can't stretch that far, look for an XPS system with hybrid (intel-nvidia or Intel-AMD) video.

Neither the CPU nor the GPU in the Vostro will handle what you want it to do.

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