To be straight forward with my problem, I'll start off with my setup:
 
Watercooled Setup, CPU/GPU on water, single loop!
 
i7 860 2.8ghz, not overclocked
Evga 480 HydroCopper, not overclocked
p55 motherboard
8gbs Corsair Vengence Ram
Corsair 1000w PSU
 
Past problems I've had were my computer was blue screening while I was playing games. I solved that problem by buying new RAM, was previously using Corsair Dominator 4gbs. Now using what is listed.
 
My current issue is that my computer is freezing( 100% lock up, have to force shutdown) while I am playing games full screen or in windowed mode. Not 100% sure if it is heat related as I have checked and double checked my GPU/CPU temps each and every time it decides to lock up. But I can almost count down when my computer freezes. Usually when my cpu reaches 41c, which is a cake walk for any cpu. My GPU usually stays somewhere between 8-12 degrees of my cpu at all times. I say a average of 10, which is why I can almost count it down. Now knowing the heat threshold of each component, this is no where near the auto shut down temperature. I've pretty much narrowed it down to it being something wrong with my video card. It can't be heat related, not under 60c. And I don't know what else it could be. I did a Gpu stress test 2 days ago to double check my theory on it being my video card, sure enough when my GPU hit 44c, my computer locked up
 
I play Diablo 3, Guild Wars 2, and more recently( past week) the new America's Army Proving Grounds Beta. My computer starts to artifact and shear in game, and it gets little lock ups, which only require a alt/tab/delete and I just go back to my game and its fine. Then about 10 mins later is completely locks up.
 
I'm about stumped as to what is causing the problem. I swapped out my video card with my brothers Geforce 250 gpu, and my computer ran like a champ. I put mine back in, re-installed the latest and greatest driver 327.23, played a few rounds of AA to get it up to temp and boom, lock up! I've reapplied thermal paste to both my cpu/gpu within this year( i think Feb or so). So it couldn't possibly be a TIM issue. I use IC Diamond TIM.
 
 
But all in all. My computer is freezing and I don't know why. So any and all help will be heavily appreciated. Thanks!

Alright. New driver installed. This was the result of the WhoCrashed. I've also done a scannow in cmd and it came back 100% error free. My freezing problem has been happening well after these program results. I'm talking within the last two weeks. I tested my comp with my brothers geforce 250 and it was peachy for as long as I had it in.
 
On Tue 9/10/2013 3:44:16 AM GMT your computer crashed
crash dump file: C:\Windows\Minidump\090913-25125-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x70740)
Bugcheck code: 0x3B (0xC0000005, 0xFFFFF9600019455B, 0xFFFFF88007630070, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: This indicates that an exception happened while executing a routine that transitions from non-privileged code to privileged code.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.



On Tue 9/10/2013 3:44:16 AM GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: ntkrnlmp.exe (nt!KeBugCheckEx+0x0)
Bugcheck code: 0x3B (0xC0000005, 0xFFFFF9600019455B, 0xFFFFF88007630070, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
Bug check description: This indicates that an exception happened while executing a routine that transitions from non-privileged code to privileged code.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.

It sounds like your video card is going out. If a substitute card runs good, then it is a likely a bum card. RMA time??

I'm leaning towards a bad video card myself. But I feel like if I buy a new video card, probably a 7xx series, it would bottle neck the rest of my computer. I would like to upgrade to the haswell chipset. But then again the new chipsets are to roll out in the next couple of years.

So I've still been tinkering with my setup to try and solve my problem. I did a windows update, which within all of the security updates, there was a Win 7 64 bit Kernel Mode update.
Almost thought that it fixed my problem as I went almost all day with no crashing. But sure enough it happened again. So I'm pretty much down to replacing my card. But also on the verge of just updating my mobo/cpu/gpu( currently using P55 series) to the Haswell chipset, possible a 760 GTX, and fixing my problem all together. IF, by some rare chance my computer still does it, then I guess I will have to buy another 8gbs of ram. Will go with Kingston this time. Try out their Hyper X series. May even invest in a small SSD as I rarely use anymore than 100-200gb of space on any given HDD

It sounds like you know your stuff but idk about this weird computer if mine.

I ran Memtest for 8 hours today. Testing 7 of 8 gbs since it wont allow you to test it all. And it came back error free. So its not my memory according to the tests.

Ill swap out my video card with my bros 760 and run furmark for a few hours and play the same games and see if it still does it
hoping i can figure this out soon cause this is getting old

If you were here in my shoes and could experience the event as it happens. It could be a great help haha. But yah. I'll do that tomorrow.
And hopefully come up with some answers. If its my card, then i guess ill get a new one. Just sucks they dont make water blocks for the 760?? If they do, i havent seen them. Id like to put a new card under water as well

if my retry with my bros card doesnt fix my problem, ill swap my ram out with his. hes got the same ram, but maybe his arent messed up. if i get the same results again. it points to my motherboard being bad. or at least thats the way i see it

i only have 2 sticks and they have to be in dimms 1 and 3 for my computer to even boot. system specs are listed on first page

And the wait is finally over. After extensive testing. The culprit is my video card!!
 
I swapped out my video card for my bro's 760, and my ram with his. Maxed his stuff out with prime95 and furmark going at the same time. Passed with flying colors. Then I switched back to my ram, his 760. Re-ran the same scenario. Passed. Put his ram in, but swapped out to my video card. And sure enough, 2mins into the double stress test, boom freeze up.
 
Thanks to everyone who put in there input. I finally put an end to my suffering! haha

I couldnt begin to tell you what was wrong. Myself and my friend think its vga memory related. Cause its not heat. It could be solder points but you gotta think i can run my card all day long. But its not until i play games. And i dont have any other semptoms except i get little black spots while i play my games. Not so much artifacting, just black spots and shapes etc.

But i just need to decide on a new video card now. I'd like to keep my card under water but i also dont feel like blowing $500 + for a 770. Or even the older 670s or 680s.

So my problem still continues. I've recently formatted and re-installed windows to solve any double drivers or anything of that sort. I switched out my video card with my bro's old 250 GTS. and really let it have it like i would normally with my 480 hydro copper. Sure enough, 20 minutes into my session of America's Army proving ground beta, My computer locks up once again. So that alone rules out that the video card is the culprit, which was what we thought it was to begin with. My buddy of mine is considering it maybe being the power supply going bad!?!? I would hate that it is the power supply. It's a Corsair 1000w psu.
 
If anyone else knows of any possible causes of why my computer is being the way it is, it's highly appreciated.
 
Thanks!

I'll switch out my bros ram and do my game trial again. If it still crashes, we've ruled those out completely. Then it leaves us with psu/mobo/ possible HHD, since I don't have an ssd

I recently swapped out my Corsair 1000w for my bros old Ultra 850. Computer still locked up. So it's down to either motherboard related, or software. Which is more confusing now then ever, knowing i just did a clean format/re-install of windows 7 ultimate 64x and have all the latest updates as of know. So there shouldn't be any conflicting drivers since I've only installed the newest and greatest of all the ones I need. I'm leaning more towards the motherboard, but I don't have any way of checking it since my brother has the new 1150 socket, so I can't swap parts out.
 
Advise??

No. most of all my friends have never had enough money to afford a descent computer, they've been stuck with xbox and playstation for their gaming needs. So its just me, my brother and our buddy wes who have computers, all of which are different cpu socket. So i'm out of luck