you dont really need to update bios unless your having a problem with something (raid, thuban, etc). you could run your ram at the rated 1600mhz for a little bump in performance(yours is at 1333 but 12800=1600mhz), probably wouldn't be noticeable though. for the NB temps,1. remove the mobo heatsink assembly (nb, tube, sb),2. remove the pink junk from the heatsink and nb and sb,3. apply good paste(as5,shin-etsu, ocz freeze, etc.),4. reinstall heatsink assembly. you can also mount a 40,60,80, or even a 120mm fan on the nb to help lower temps. just doing the thermal paste change should drop your temps down to mid 40c at idle. you can also add small plastic washers to the heatsink assembly screws before you insert them into the board. this will increase pressure on chips. be carefull doing any of this!
edit: im not the guy to give advice on bios. im still using v1.7 cause i dont have any reason to update. it works good. it may not have pink junk, clean whatever is on the heatsink and chips and apply your own paste.
Thanks for your reply.
As the North Bridge is currently at 66c at idle will this have any effect on the system? I understand that the max temp is 80c?
Also with regards to the memory speeds I was advised on another forum to leave it at 1333mhz because I only overclocked the CPU by increasing the multi for the CPU. Shall I still go ahead and change the speeds to 1600?
Please can you let me know