Ok, I'm back after a loooooot of testing.
@ F5BJR, thanks for the tips and I had already compared the power requirements of the cards and my current config together with the PSU is fine to handle the new card. The difference is actually only 60 Watts (aprox. 320 vs. 380 under full load) which is much less than my current overhead on the system. As far as the thread goes that is one of the threads that I already had looked through before posting here but thanks for looking around for me, I really appreciate the effort
So here are the results of my further testing:
I have now run between 17-19 passes on all my memory sticks (ran the test overnight) and I only generated one error on one stick. The error occured on pass number 15. So since then I have updated the motherboard BIOS to the last non-beta (F8, improved memory performance) and retested that memory module and it ran 21 passes with no errors.
I have also run Prime95 with lots of RAM testing stable for 37 hours. I feel at this point that my hardware is pretty solid. What do you think?
Here's the kicker though, I have found information on the net that my motherboard has problems to run the full 8GB it's said to support!?! So I pulled out 4GB of RAM and reinstalled the latest graphics card driver and it now runs just like the windows driver in Furmark. So I have now played with the new driver and only 4GB and have had no BSOD but a couple of game crashes but that could be the game.
So... now I am going to throw in the full 8GB after updating the BIOS on the motherboard and see how that goes.
What are your thoughts?