It seems that most freezes are gone with:
- 270.29 beta driver
- MTRR enabled by appending enable_mtrr_cleanup mtrr_spare_reg_nr=1 to the list of kernel options (see http://www.nvnews.net/vbulletin/show...8&postcount=39
I didn't investigate further to know if both the driver and the MTRR trick are required.
Thanks a lot,