OK, 67 assuming that is the true DIODE temp according to CoreTemp is OK but at the very high end
If you did not read the true DIODE temp of the processor and instead read the CASE temp which is usually 10-15c less than the DIODE then you may very well be overheating and forcing to proc into its tJunction where it throttles itself back due to temp
Assuming that is in order, the memory speed/timing appears correct. Although 800MHz is not what I would call a great memspeed you should not be seeing major perf issues and should be able to find a spot where it runs decent for you
At this point I can suggest the 1.74.74 beta driver for XP
http://www.nvidia.com/object/winxp_174.74.htmlignore the card list.. the driver will install
And you will need to restart Nhancer after installing that driver to be sure it initializes with the new driver on the correct settings. It will ask when booted after the drivers have been installed to import new profiles and the FSX profile you made shuld be one of them, just allow it to import them all.
When you change video drivers use ADD AND REMOVE PROGRAMS.. once the driver is unistalled, reboot and install the new driver... reboot and wait a few minutes, then reboot again. ... then set up Nhancer
After uninstalling the old driver upon first reboot I sometimes run a driver cleaner program in safe mode to be sure all the old driver files and reg entries are wiped
I really do not know what to tell you past that. The board you are on is a nvidia budget board and the only thing worse than a top of the line Nvidia board is one of their budget products
Make sure you have the latest chipset drivers installed for this board and do that before replacing the video driver