Multiple BSOD causes, mostly ntoskrnl.exe errors.

Since I've installed my new graphics card I get allot more blue screens.
I attached the file with all my minidump files. Made with SF_Diagnostic Tool.
If someone could help me out I would greatly appreciate it.

If you need to know more about my system, I will try to reply to messages as soon as possible.

Multiple errors, but none of them are pointing to GPU directly.

Code:

BugCheck A, {10, 2, 0, fffff800034ac103}

Probably caused by : memory_corruption ( nt!MiReplenishPageSlist+73 )

Followup: MachineOwner
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BugCheck 3B, {c0000005, fffff80003485ebe, fffff8800b47b7f0, 0}

Probably caused by : ntkrnlmp.exe ( nt!KeWaitForMultipleObjects+3e )

Followup: MachineOwner
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BugCheck 1E, {0, 0, 0, 0}

Probably caused by : hardware ( USBPORT!USBPORT_Core_iIrpCsqCompleteDoneTransfer+2e8 )

Followup: MachineOwner
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BugCheck D1, {fffffa7f929efd8c, 2, 0, fffff88004355fd0}

Probably caused by : USBPORT.SYS ( USBPORT!USBPORT_Core_DecIoRequestCount+14 )

Followup: MachineOwner
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So the most consistent error is USBPORT .... and some additional info about it are:

No code has to be inserted here.

The best to do is a clean reinstall. But before doing that, make it sure that the hardware are working properly.

Test your RAM modules for possible errors; as the BSOD points to memory corruption, too.
How to Test and Diagnose RAM Issues with Memtest86+
Run memtest for at least 8 passes, preferably overnight.
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; as you have doubt.
Video Card - Stress Test with Furmark

Then, go for a Clean Reinstall - Factory OEM Windows 7, which works equally good for retail, too.