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HD4600 shows 5mb of Vram

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Hello I installed Sierra 10.12.3 in my Lenovo Z710.  Installation went fine and booted successfully. I have some problems but the main problem here is the hd4600 graphics.It only shows 5mb of ram and everything is laggy.

I tried various solutions including kexts and config.plist settings like device fake id (0x04128086) and platform-id (0x0a260006). Nothing seems to work. I have disabled Nvidia card in my bios settings.

Specs are:
Lenovo Z710
CPU: Intel Core i5 4200m 2.5Ghz (HD4600)
GPU: Nvidia Geforce 745m

Any help is appreciated, I can upload ioreg, clover settings or kext list if you want.

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