Persistant & Frequent BSoD

When I first launched the game it blue screened and crashed my system immediately.

The second time I got to character select. Then BSoD.

I performed some windows updates as I recently had to perform a clean install and tried again.

Got to play for about 20 minutes (first time actually getting to play the game and loved it) and BSoD returned.

The following report has occurred with every BSoD

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033

Additional information about the problem:
BCCode: 3b
BCP1: 00000000C0000005
BCP2: FFFFF880059A4BF9
BCP3: FFFFF88009BADD00
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\040612-20514-01.dmp
C:\Users\<user name>\AppData\Local\Temp\WER-37986-0.sysdata.xml

The machine:
AMD Phenom II Hexacore 1100T OC at 3.7ghz 2ghz north bridge
8gb DDR3 @ 1600mhz (no OC)
2x ATI Radeon 5770HD in CrossfireX
Win 7 64bit
Soundblaster X-Fi Titanium F4t4lity Pro sound card.

Have not had this issue with any other game ever.

As the BSoD reported a system service error with portcyl.sys rather than an ati driver I have not tried disabling CFX.

I did not see this listed in the "Please read before posting" thread.

seems to be the known problem with X-Fi sound cards.
see this thread for further information:
http://www.pathofexile.com/forum/view-thread/23875