I'm having issues with my comp freezing, and I've finally narrowed it down.

First, system specs:

4790k CPU, 16 GB RAM (Sticks pass Memtest), R9 295x2 graphics card, most recent stable drivers installed, Windows 8.1 64-bit

Now the issue:

During random moments, sometimes when the computer itself is running idly with no user input, the computer will lock up and freeze. From what I've found, its because of the Intel Graphics 4600 on board the CPU interfering with the separate graphics card.

-I've entered my BIOS to force the computer to only use the PCI slots, but it has not fixed the issue.
-I've updated the Intel Graphics drivers to the 64-bit version to no avail.
-When I enter Hardware Manager to disable the Intel Graphics, I only see the R9 295x2 (AMD R9 200 series repeated twice)

Is there any way I can shut off the Intel Graphics on the CPU? This is quite frustrating.

Crashlog:

Faulting Application Path: C:\Windows\System32\igfxCUIService.exe

Problem signature
Problem Event Name: APPCRASH
Application Name: igfxCUIService.exe
Application Version: 6.15.10.3907
Application Timestamp: 53e0fb5e
Fault Module Name: igfxCUIService.exe
Fault Module Version: 6.15.10.3907
Fault Module Timestamp: 53e0fb5e
Exception Code: c0000005
Exception Offset: 00000000000172b9
OS Version: 6.3.9600.2.0.0.768.101
Locale ID: 1033
Additional Information 1: a03e
Additional Information 2: a03e22ea5e38d993ad1adaeaeef6014d
Additional Information 3: c832
Additional Information 4: c832973209a1e3cf18399711242902d8

Extra information about the problem
Bucket ID: 103a23d86f068b17a958745f2fc3a3c8 (85948040035)