I have a Duron 700 and Asus A7V BIOS 1004. First I used the pencil trick and oc'd to 900 Mhz. 950 wouldn't work so I repencilled. But it seems that the original stuff that was on my original heatsink that came with the CPU (I guess it was thermal tape), is not made for removing and replacing the HSF. There are some remains of it on the sink but I don't think that it is not doing a great job making contact between CPU and heatsink. The second time I reached 978 Mhz, but running at 900 Mhz now gives me about 10 degrees C. more than the first time 55 deg vs. 45 deg C. I know it's better to replace the tape, but I rather would not. I heard that the temp reading of the A7V is not very accurate. If the real temp was only 50 deg, I could live with it.