Ketchup on copper

[Firestrider]

I read that a good cleaner for copper waterblocks is ketchup, is this true?

I have some black residue on the exterior of my blocks and it seems alcohol won't clean it up. Would ketchup do the job?

On a non-related note: it seems that a MCW60-R2 waterblock is not making complete contact with my 4850 GPU core. The thermal paste is making contact but the copper is not touching it because there is a 1-2 mm space. Does this matter much?

[axis01]

Yes and Yes.

The acid in ketchup will eat off residue on copper blocks. There's also a few other things that work well too. I forget them but i'm sure someone will reply with them.

If your GPU block isn't making contact with the GPU, how's it supposed to cool it?

Axis

[Spawn-Inc]

you can also go straight to the source that gives ketchup its power, vinegar. but ketchup is a bit better in that it sticks to the spots you want it to.

[Conumdrum]

The Block needs to be Solid with less than ohh 10/1000 of an inch away from the chip. The TIM layer should be very very very thin, there should really be no gap, 10/1000 of an inch is almost nothing. A sheet of printer paper is probably 7/1000 of an inch or so. If you can slip 2 sheets of paper or more (about 14/1000's of an inch) between the block and chip something is very wrong.

[axis01]

The Block needs to be Solid with less than ohh 10/1000 of an inch away from the chip. The TIM layer should be very very very thin, there should really be no gap, 10/1000 of an inch is almost nothing. A sheet of printer paper is probably 7/1000 of an inch or so. If you can slip 2 sheets of paper or more (about 14/1000's of an inch) between the block and chip something is very wrong.

Can we see pics of those measurements. :D

Axis

[Conumdrum]

LOL, I use those sort of measurements. The tightest tolerance between two 1000 lb or so 2' wide printing rollers is +/- 7/10 of 1/1000 tolerance. .254 +/_ .0007 I use a .004 feeler guage to check slitter blade gaps all the time. Many exacting tolerances, what a pain......

I do that sort of stuff and maintain all the electronics. I can go from a laptop and a o-scope to wearing a paper suit replacing 100 lb ink rollers in a minute. Or checking the stuff above. Never the same each day, thats for sure.