So I just lapped my Q6600

[steve258]

And it ended up looking like this..

Does that look right?

Not what I had in mind but it's very flat now and overall temp is about 10C cooler according to everest. It was fairly concaved so took me well over an hour to sand it down to copper with a 400grit, from then on it got easier with each grade increase, spent about 10 mins sanding in circular motion on each grade from 600, 800, 1000 and all the way to 10 micron.

But the B3 runs HOT and it's still topping out 90C at anything more than 1.45V when priming and that's under lapped tuniq tower as well with arcticlean and AS5 applied.. It was throttling as well so good job I left TM2, C1E & EIST enabled.

 

[steve258]

Yeah it says 90C in everest when priming at 3.4Ghz 1.45V. And yes it's seated properly as far as I can see. Can't be bothered to take the mobo off again to remount the HSF, it's currently at 3.33Ghz 1.425V and all 4 cores are at around 70C running 4x F@H so it should be fine.

And no I haven't tried breaking the 400FSB again as the chip won't do that high anyway without monster cooling so there's not much point. I'm sure it's the settings or BIOS I use will have to try later.

 

[steve258]

I heard that you get shinier surface with up & down method but flatter surface with circular or figure of 8.

 

[steve258]

What's wet and dry? On the instruction it simply says put a few drops of water as lubricant.

Hmm I still have the sandpapers so may do it again if it's absolutely necessary.

 

[steve258]

^^ so you're saying I've used the wrong papers to start with?

I bought them as part of a lapping kit for heatsink so I assume they must be wet & dry. How can you tell a wet & dry paper from normal sand papers? Sorry for my lapping n00bness.

Seems everyone has had a better finish than mine..

 

[steve258]

Cheers think I'm just gonna leave it then.

From that link it looks like temp will reduce further still after the thermal paste has settled in.

 

[steve258]

Not exactly. You only need to lap it until the surface is flat, ideally without taking too much off. You'll know when to stop because the copper surface starts to reveal as you are sanding it down. Use a coarse sand paper (200/400grit) to sand it down to copper surface then work your way down to finer grit papers. You should end up with a very smooth (although not necessarily shiny as in my case) copper surface, do the same with the heatsink base if you wish.