Different BSODs infrequently occuring

The PC I have had built for around 5 years but its been upgraded twice, the last upgrade is when all the issues started arising.
I upgraded GFX card, CPU and motherboard myself to make an uber gaming PC but its backfired my PC is almost unusable at times.

Normally happens when gaming CS:GO or recently I'm playing Titanfall, but can happen watching movies.
If its not the BSOD then CS:GO may freeze and I need to ALT+TAB in and out to resume gaming - this can happen every day normally during prolonged play.

I think I have 4 different BSODs (dxgmms1.sys, irq not equal, bad pool error, maybe one other).

Have ran memtest and my RAM seems fine, I have a hunch its my graphics card I paid £250 for which just annoys me and put me off trying to fix this. Other hunch tells me its the motherboard because i seen 1 inconsistent pin when connecting CPU.

I can game for 4 hours a day and maybe not get a BSOD there is just no pattern I have identified, I have had 31 BSODs since June 2014 after a re-install.

I'm desperate for any input please find attached all my dump files in the format as recommended by the forum guidelines.

The crash dump blames the display for the BSODs. Same thing with various different bugcheck codes.

Code:

BugCheck C2, {7, 109b, 0, fffffa800ec364f0}

GetPointerFromAddress: unable to read from fffff80003507100
GetUlongFromAddress: unable to read from fffff800035071c0
Probably caused by : dxgmms1.sys ( dxgmms1!VIDMM_GLOBAL::CloseOneAllocation+264 )

Followup: MachineOwner
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Code:

BugCheck 1000007E, {ffffffffc0000005, fffff88005820e1d, fffff880079a6568, fffff880079a5dc0}

Probably caused by : dxgmms1.sys ( dxgmms1!VIDMM_GLOBAL::ReferenceAllocationForPreparation+19 )

Followup: MachineOwner
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I would suggest you to install nvidia 347.52 WHQL at first and see how it goes.
Latest NVIDIA ForceWare Video Drivers Windows 7

Let us know the result. Further actions will be taken depending on the situation.

Display failure. With another bugcheck code and with the latest version of the display driver installed.

Code:

BugCheck 1A, {403, fffff6800007d9b0, f2d00001b326b80d, fffff680000ec928}

Probably caused by : dxgmms1.sys ( dxgmms1!VIDMM_GLOBAL::CloseLocalAllocation+b0 )

Followup: MachineOwner
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Test your RAM modules for possible errors.

How to Test and Diagnose RAM Issues with Memtest86+

Run memtest86+ for at least 8 consecutive passes.

If it start showing errors/red lines, stop testing. A single error is enough to determine that something is going bad there.

Stress test the Graphics Card using Furmark.

Video Card - Stress Test with Furmark

Take a screenshot of the furmark window before closing it. Upload the screenshot for us.

Is the computer hot? Report us the heat of the computer after a couple of hours of your normal usage. Upload a screenshot of the summery tab of Speccy. Alternatively, you can publish a Speccy snapshot too: Speccy - Publish Snapshot of your System Specs .

Let us know the results.