ok at current i am running,
amd 1800+
msi 6340 Mobo
m2-atx
512mb ram
all in custom Mdf case covered in sub carpet

there is a fault with my Mother board one of the temp probes is showing cpu idle temp of (speedfan) 110 deg C, (MBM) 133 deg C, it is still stable but slow(with certain apps), so i am looking at updating to

Athlon 64 LE-1620
Asrock ALive NF6G Mobo
2 x DDR2 PC2-6400

i may underclock cpu, any advise on this setup would be helpful