[Help] Mod Vram for Dell INS 14 5448!

Hi all,

Sorry, my English is not good.

I have a laptop Dell INS 14' 5448, my bios is InsydeH20. Please help me mod Dedicated Vram from128MB to 96MB. I will use mod fo hackintosh El Capitan.
CPU: Broadwell 5200U
Chipset: point-LP
VGA: Intel HD 5500 + AMD R7
Audio: ALC255
Wifi: Intel DualBand



Thanks you!

Link setup bios:  http://downloads.dell.com/FOLDER03371364...48_A06.exe