How to change IRQ DS3

[gash2024]

I want to change the IRQ of my G card as its sharing IRQ 16 with 5 other items and i cant play games and my screen keeps freezing every now and then it just goes black or the mouse freezes then it goes black then it comes back and everythings fine for a while

 

[gash2024]

it really anoying because if i try to play a modern game like bf2 it wont or if i play mohaa i have to turn everything in geforce control panel to low otherwise if just crashes its like its fighting for resource against the other items which infact are 6 and not 5 as i earlier said which is stupid damn you gigabyte.

EDIT
Devices sharing IRQ 16 are

Intel(R) ICH8 PCI express root port 1
Intel(R) ICH8 PCI express root port 5
Intel(R) ICH8 USB controller
Intel(R) ICH8 P965/G965 PCI express root port
Marvell Yukon ethernet controller
NVIDIA Geforce 7800 GT
Standard dual channel PCI IDE Controller

doesnt make sense to me