Freeze/Crash & BSOD issues

[KisaiTenshi]

Issues:

Machine:
Motherboard: ASUS Z87-PRO
CPU: INTEL 4770K @ 3.5gHz
Memory: 16GB of G.Skill Ripjaws DDR3 1600 (PC3 12800)
Video: NVIDIA GTX 670 4GB
USB Devices: Keyboard, Mouse, XBOX Wireless Controller.
Monitors: Three monitors installed with the primary (middle) used to display/play the game.

My computer is similar except for the video card/monitors:
MB: ASRock Z87 (Extreme 4),
CPU: Intel 4770 (non-K)
32GB RAM Mushkin PC3-12800 (DDR3 1600)
Video: AMD Radeon 7770 1Ghz 1GB GDDR5 (Asus model)
USB, keyboard, mouse, Xbox Wired controller
Single monitor on DVI

As for crashing, it's doing it a lot, but varies between several minutes (the symptom right before it crashes is the frames lag, not frame-rate dropping), At maximum settings I get 24fps, and if I tick it down to get 30 or 60fps, the crashes will still happen, so the video card is not the culprit.
I have a tool called Process Lasso that I can use to kill/throttle processes, park cores and prevent processes from using the hyperthreading, even when the tool is disabled, the crashes happen.
I have a program that came with the motherboard called cfosspeed that throttles applications network use. After explicitly adding ffxiv to it and process lasso the crashes happen only slightly less, which suggests it's not these programs (basically the tweaks mean "don't touch this process")
I've used MSI Afterburner instead of the ASUS version to allow for video capture, as a side-effect it also spins up the GPU fan more aggressively. Crashes happen with and without this program running. The funny thing is, even if I record a full 90 minute dungeon run (200GB or so disk space) the frame rate is unphased, which suggests to me that there really is not a hardware problem at all.

But I'm not getting BSOD's just crashes.
blem signature
Problem Event Name: APPCRASH
Application Name: ffxiv.exe
Application Version: 1.0.0.0
Application Timestamp: 522f769d
Fault Module Name: ffxiv.exe
Fault Module Version: 1.0.0.0
Fault Module Timestamp: 522f769d
Exception Code: c0000005
Exception Offset: 000e6776
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789