Need help with newly built computer!

Hey there I recently put together my computer for a better gaming experience and I don't know whats going on but something somewhere is going wrong. Everytime I try to play a game like starcraft 2 or star wars the old republic I get a blue screen and a get a 0x0000016 error.
Also I got a weird first error when I installed windows the first time.

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Dump File : 021212-16894-01.dmp
Crash Time : 2/13/2012 12:39:43 AM
Bug Check String : DRIVER_IRQL_NOT_LESS_OR_EQUAL
Bug Check Code : 0x000000d1
Parameter 1 : fffff880`efddbeec
Parameter 2 : 00000000`0000000e
Parameter 3 : 00000000`00000001
Parameter 4 : fffff880`0fffd732
Caused By Driver : nvlddmkm.sys
Caused By Address : nvlddmkm.sys+1ea732
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+71f00
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\021212-16894-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 262,144
==================================================

then the 0x0000016 errors

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Dump File : 022212-15756-01.dmp
Crash Time : 2/22/2012 5:39:22 PM
Bug Check String :
Bug Check Code : 0x00000116
Parameter 1 : fffffa80`0679e4e0
Parameter 2 : fffff880`10081ae4
Parameter 3 : 00000000`00000000
Parameter 4 : 00000000`00000002
Caused By Driver : dxgkrnl.sys
Caused By Address : dxgkrnl.sys+5ccbc
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+71f00
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\022212-15756-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 538,920
==================================================


==================================================
Dump File : 022212-16052-01.dmp
Crash Time : 2/22/2012 5:34:33 PM
Bug Check String :
Bug Check Code : 0x00000116
Parameter 1 : fffffa80`08abf4e0
Parameter 2 : fffff880`1008fae4
Parameter 3 : 00000000`00000000
Parameter 4 : 00000000`00000002
Caused By Driver : dxgkrnl.sys
Caused By Address : dxgkrnl.sys+5ccbc
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+71f00
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\022212-16052-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 533,448
==================================================

Make sure all of the cables are fit properly, as a lack of power to graphics card could certainly cause problems.

I'm gonna double check the cable connections then, but do you think it could be a faulty motherboard or graphics card? I read somewhere that the Asus motherboard I have has been known to be defective. Oh also Ill post my system specs :

OS : Windows 7 Ultimate x64 bit
CPU : Intel Core 2 quad CPU Q9400 @2.66 GHz 2.67 GHz
Motherboard :Asus P5G41T-M LX PLUS
Memory : 8 GB of RAM
Graphics Card(s):nVidia GeForce GTX 560 Ti
Monitor(s) Displays :HP LA2205, DELL E228WFP
Hard Drives: Hitachi HDS721680PLA380 ATA Device - 75 gb
WDC WD3200AAKS-61L9A0 ATA Device - 325 gb PSU : UL series 575 watt ATX power supply
Case :CM Storm Enforcer ATX Mid-Tower USB 3.0
Cooling :Cooler Master Hyper 212 plus

The file I always see pop up in the BSOD is nvlddmkm.sys

You will probably have much better luck by posting in the Crash/Debug room.
there are specific instructions on what what to post and how to get the files needed for the team of people here to help you.

When I built my first PC, I had a crashing problems as well. I followed the instructions in the sticky located at the top of the list of threads in that room and someone helped me overcome the problem in less than 24 hrs.

Ah ok your right sorry first time poster heh. Thanks!