HD 4600 enabled QE\QC but with low performance, help me please

[ActuallyMax]

Here is my Hackintosh

 

Yosemite 10.10.1

Clover+GPT 128G SSD

GA-H97N-WiFi

8G+4G 1600MHZ RAM

i5 4460

BCM94322+BAT-402

 

Now everything works really fine, Airdrop and Hand-off enabled, sleep enabled, QE\QC enabled, iMessage and Facetime worked

 

but one thing bothers me is HD 4600 low performance, I can feel the slightly UI lag when I use lanuchpad

 

 I have tested with OpenGL extension viewer, only got 500 scores, that is really low consider it is HD 4600, and my friends get more than 1200 scores with HD4600.

 

bye the way I use DSDT to inject ig-platform -id.

H97N-F5-DSDT.aml.zip