IRQL not less or equal BSoD

Hello folks,

I've been having an issue with the irql_not_less_or_equal BSoD for a while now. I built my computer two years ago and started experiencing this last summer when playing games. I stopped playing on my pc until now though and again I keep getting this BsoD after anywhere from 30 sec to 5 min while playing the FFXIV beta. It has also happened when I've had multiple tabs open to watch two or three streams on twitch at once. I use a dual screen setup if that matters.

I've tried updating my video drivers to nvidia's 320.18 and it still kept crashing but this time the BSoD mentioned dxgkrnl.sys and another time it mentioned usbport.sys. I have since went back to 310.90 and it's just irql_not_less_or_equal again. As for a quick glance at my setup I have an AMD Phenom II X6 1100T, Asus M4A88TD-V Evo motherboard, G.Skill Ripjaw 4Gx2 ram, EVGA GTX460 SE video card, and a modular OCZ 600W power supply. Is my memory faulty or is it really an actual driver problem? Any and all help would be greatly appreciated!

How was your copy of windows activated?

Code:

OS Name:                   Microsoft Windows 7 Ultimate 
OS Version:                6.1.7601 Service Pack 1 Build 7601
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Standalone Workstation
OS Build Type:             Multiprocessor Free
Registered Owner:          The Batman
Registered Organization:   
Product ID:                00426-OEM-8992662-00173
Original Install Date:     8/9/2011, 1:23:49 AM
System Boot Time:          6/14/2013, 8:27:22 PM
System Manufacturer:       System manufacturer
System Model:              System Product Name
System Type:               x64-based PC