Hi,
More bsod details as promised.
Stop: 0x00000050 (OXFFFFF8880435C428, OXOOOOOOOOOOOOOOOO, OXFFFFF880043598OA, OXOOOOOOOOOOOOOOO5)
applecharger.sys - address fffff880043598oa base at fffff88004357000, dates tamp 4d2ad809
Upon restarting after bsod, given option of starting in safe mode. not taken and things run OK. I've had one lock up since.
Machine was stable for 2 weeks (since being built) until adding cards.
Thanks for the help.