Game randomly freezes

Hello,

I have been playing the game since A Realm Reborn's release and here for the pass couple weeks to month my computer has been randomly freezing up my whole computer. I would have to hold down my power button and restart my computer and then the game may run for awhile or freeze again. As I said it is completely random. I will say my computer does not behave this way with any other program or game. I hope someone can help. Below I will list my computer specs. At first I thought it was a heating issue but I have checked my temps and neither my processor or video card is getting over 70 degrees C. I checked with both AMD and Nvidia and they have said those temps are within working parameters.

3x Internal Sata Hard Drives (931GB,1.35TB,698GB) --game is on the 1.35GB Drive
1x Sata Solid State Drive (238GB)
AMD FX 9590 Vishera 8core 4.75Ghz
Cool Master Eisberg 240L Prestige liquid cooler
Asus Sabertooth 990FX R2.0 Motherboard
2x G.Skill Ripjaws X Series 8GB 240-pin DDR3 SDRAM DDR3 1866 (PC3 14900) (16GB Ram Total)
Rosewill Bronze Series 1000W Power supply
Asus DirectCU II GTX 780TI 3GB 384-Bit GDDR5 PCI Express 3.0
Windows 8.1 64-bit (did it in windows 7 too thought the upgrade may fix it but it didn't)

one of 2 possiblities
Faulty or incorrectly configured system memory.
Faulty or unstable clockrate on the graphics card.

how would I test these things? Also why would it only do it during FFXIV?

70C may technically be within parameters, but that doesn't necessarily follow that stability is guaranteed. As temp's rise, so does the potential for errata as the temperature affects the materials in use. Signalling can start to get skewed and the data points aren't as detectible at stock voltage. This is more an issue with overclocking... but sometimes it can happen at stock clocks with video cards. Third parties can ramp up clocks over the reference design to get a performance edge. Over time, this can degrade components and as the card ages it may not be able to maintain those clocks--or the cooler may not have been install very well and it has issues out the box.

Try lowering your clock speeds and such to see if conditions improve.

I read on nvidia forums after I posted here that someone else was having similar problems and they uninstalled the geforce experience extra stuff adn it helped and another guy posted his asus gpu tweak clocking stuff and that fixed his issue which was also similar, really hoping I don't have to get new video card and ram

I would start by returning the graphics card to reference clockrates, which for the 780ti are

Baseclock = 876
Boost clock = 928
VRAM - 7Ghz

I did a couple things tonight at raid time, first off I uninstalled "The Geforce Experience", some people on nvidia forums recommended doing that. Also a fellow FC memeber had similar issues to mine until he uninstalled the experience thing. Secondly I found a guy's Asus GPU Tweak Settings that he was using due to random lock ups while playing a couple different games.

Current Tweak Settings

GPU Boost Clock = 940
GPU Voltage = 1157
Memory Clock = 7000
Power Target = 100%
Target Temp =82 degrees C
Fan Speed = 100%
Display Refresh Rate = 60

Anyways had no issues with lock up today/tonight with these settings, so I am not sure exactly what all was going on but today everything ran fine...Who knows though what will happen tomorrow LOL