BSOD After reinstaling windows post mobo change

Your crash dumps are not showing any finite probable cause.

Test your RAM modules for possible errors.
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.
If memtest finds no issue, enable Driver Verifier to monitor the drivers.
Driver Verifier - Enable and Disable
Run Driver Verifier for 24 hours or the occurrence of the next crash, whichever is earlier.

   Information

Why Driver Verifier:
It puts a stress on the drivers, ans so it makes the unstable drivers crash. Hopefully the driver that crashes is recorded in the memory dump.

How Can we know that DV is enabled:
It will make the system bit of slow, laggy.

   Warning

Before enabling DV, make it sure that you have earlier System restore points made in your computer. You can check it easily by using CCleaner looking at Tools > System Restore.

If there is no points, make a System Restore Point manually before enabling DV.

   Tip

• If you fail to get on the Desktop because of DV, Boot into Advanced Boot Options > Safe mode. Disable DV there. Now boot normally again, and try following the instruction of enabling DV again.
• If you cannot boot in Safe mode too, do a System Restore to a point you made earlier.

Let us know the results, with the subsequent crash dumps, if any. Post it following the Blue Screen of Death (BSOD) Posting Instructions.

It is avast!

Code:

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*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
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Use !analyze -v to get detailed debugging information.

BugCheck C4, {f6, 4c, ffffe0000b7e5200, fffff80001aa4540}

*** WARNING: Unable to verify timestamp for aswSnx.sys
*** ERROR: Module load completed but symbols could not be loaded for aswSnx.sys
Probably caused by : aswSnx.sys ( aswSnx+29540 )

Followup: MachineOwner
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In that situation, you will need to uninstall Avast.

As you wish Windows 8, Windows Defender is supposed to be a real good protection there. Add MalwareBytes Anti Malware there, it will be an excellent protection.

Code:

ffffd000`22bd8078 fffff803`911cb7e9 nt!KeBugCheckEx
ffffd000`22bd8080 fffff803`911ca03a nt!KiBugCheckDispatch+0x69
ffffd000`22bd81c0 fffff803`910a72ef nt!KiPageFault+0x23a
ffffd000`22bd8350 fffff803`9111f390 nt!MiUnlinkPageFromLockedList+0x1ff
ffffd000`22bd83e0 fffff803`9111eec4 nt!MmPurgeSection+0x36c
ffffd000`22bd84d0 fffff803`9114059b nt!CcPurgeCacheSection+0xc8
ffffd000`22bd8540 fffff803`91140292 nt!CcPurgeAndClearCacheSection+0x73
ffffd000`22bd85f0 fffff800`00d0c2c1 nt!CcSetFileSizesEx+0x1aa
ffffd000`22bd8670 fffff800`00da7dc3 Ntfs!NtfsSetBothCacheSizes+0x5d
ffffd000`22bd86e0 fffff800`00d8f97f Ntfs!NtfsDeleteAllocation+0x29f
ffffd000`22bd87c0 fffff800`00ddffc5 Ntfs!NtfsDeleteAllocationFromRecord+0x13f
ffffd000`22bd8870 fffff800`00db0987 Ntfs!NtfsDeleteFile+0x3b9
ffffd000`22bd8b30 fffff800`00dbe459 Ntfs!NtfsCommonCleanup+0x1547
ffffd000`22bd8f50 fffff803`911c35f7 Ntfs!NtfsCommonCleanupCallout+0x19
ffffd000`22bd8f80 fffff803`911c35bd nt!KxSwitchKernelStackCallout+0x27
ffffd000`384ba350 00000000`00000000 nt!KiSwitchKernelStackContinue

Make it sure that the OCZ-AGILITY3 SSD is running with the up-to-date firmware. Download OCZ Toolbox and Firmware Updates

And, Microsoft Storage Spaces Controller. What about it? What about it? Can you tell me about it?

Sorry to butt in Archie, a few obsevations (i have not run your dumps just scanned the thread)

So many bluescreens on a vanilla install is never a good sign, this would make me consider two possibilities
1. there is faulty hardware causing the machine to throw
2. serious incompatabilities causing problems

if this were my machine i would either
run hardware tests on all components to test them (you have already done some) and then even possibly run machine with minimal hardware ie no gfx just onboard, 1 HDD if you are using more, 1 ram stick etc
or
install win 7 (which will run fine for 90 days without activation or longer if needed) and run some tests to see if stable?

this may give you a better idea of the root cause of your issues so can you can focus your actions slightly, if machine runs good on 7 then you may have driver/software based issues with 8.1 which wouldnt be suprising given the newness of it all. If 7 does work may give developers a chance to catch up/bug fix 8.1 issues

Anyway thats my tuppence worth i`ll leave you in archies more than capable hands

All the best :)

Microsoft Storage Space Controller aka spaceport.sys
This is a win 8 driver that we havent seen before, i think arc was asking if you knew anything about, ie it was related to a piece of software you installed or something but now we know it belongs to win 8 and is a critical system driver/service
Hes started a thread running on it now to see who knows what about it