High e4300 temps with coretemp

I built this computer in summer 07:

e4300 L2 stepping
Zalman 9700 pwm version with artic silver 5
2900xt
P35C DS3R
HX620W
Geil Ultra 800mhz 2gb
Antec P182

At stock speeds and with voltage set to auto (lower than stock, as i tried stock and temps were even higher) and the case fans set to medium, the cpu idles at 43 degrees celcius in coretemp 0.95. I'm not sure exactly what room temp is here in london, but i think it's around 24 degrees, as it is fairly cool.

Bear in mind that there are two case exhaust fans directly next to the 9700

I had speedfan before and it was 15 degrees lower, but was screwing around with the fan speed, so i uninstalled it.

In bios, the cpu temp is shown as 31 degrees and fan speed as 1700 rpm, which seems unreasonably high for the bios screen.

I have looked, but i can't seem to find it on the internet:

Does the e4300 (L2) have a tjunction of 100, in which case i need to re-install the heatsink, or does it have a t junction of 85, in which case i am happy(er)?