I was in a similar sitution when i got my Phenom II x4 965..
Temps were ALOT higher than Athlon II x4 640 + voltage my board has some crazy LLC going on which I hate and cannot turn off
1.4v in bios gives me 1.45V Load rather annoying. and temp is very similar to yours full load
@ 3.8ghz 1.45V with windows readings.
I just overclocked it a bit to 3.6 GHz and the temperature was nearly identical. (The idle temperature went down to 40C and the load was 55C) I might go for 3.8 GHz.