Hand lapped my 5950x

lobstar

Limp Gawd
Joined
Nov 24, 2004
Messages
237
I still have to clean it up a little bit but I'm really happy with the visual result. I got a small sheet of glass from Lowe's and used 3m wet/dry sand paper from 400 to 1500 grit with a bit of water. It took about 3 hours total while watching twitch. I'll report pack once I get this under my Optimus Foundation water block.
1617513596023.png
 

lobstar

Limp Gawd
Joined
Nov 24, 2004
Messages
237
looks pretty good. checked with a razor?
Yeah! It's really close to perfect. I could probably give it another hour on 2000 grit but I'm not sure how much improvement I can really get. I was thinking of covering the surface with ink and giving it another go to see which area loses the ink first just to confirm. I think I'm in diminishing returns territory as it is though.
 

lobstar

Limp Gawd
Joined
Nov 24, 2004
Messages
237
So so so any results? I am curious before I install a 5950 in my loop.
I am waiting on my Optimus GPU block before I assemble the system. I'm six weeks into my 1-2 weeks shipping so who knows when it will arrive.
Are you going to lap the block too
I have an Optimus Foundation AM4 block which comes machined flat and polished.
 

smoothmove

Limp Gawd
Joined
Jul 11, 2004
Messages
231
I am waiting on my Optimus GPU block before I assemble the system. I'm six weeks into my 1-2 weeks shipping so who knows when it will arrive.

I have an Optimus Foundation AM4 block which comes machined flat and polished.
You can't drop this on us and then tell us to wait. Lol.
 

lobstar

Limp Gawd
Joined
Nov 24, 2004
Messages
237
Yeah but I thought that would generally be useless because we don't know if he has a better binned cpu to begin with.
I understand your viewpoint but I don't really care about the data as much. I've never done this before and hate tearing down my loop. Personally, I just wanted to give myself the best opportunity with the least effort. I'm in the camp of 'there's lots of existing data' for me to make comparisons with. I always end up with absolutely terrible luck in the silicon lottery.
 
Joined
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I understand your viewpoint but I don't really care about the data as much. I've never done this before and hate tearing down my loop. Personally, I just wanted to give myself the best opportunity with the least effort. I'm in the camp of 'there's lots of existing data' for me to make comparisons with. I always end up with absolutely terrible luck in the silicon lottery.
Hopefully not this time!
 

Digital Viper-X-

[H]F Junkie
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Dec 9, 2000
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14,387
I did hand lap a CPU long ago, I may have even posted the results on here :) but it was long long long ago.
 

Digital Viper-X-

[H]F Junkie
Joined
Dec 9, 2000
Messages
14,387
Ahh, it was the water block, it wasn't flat at all, so I did lap it to reduce the waviness.
(2008, apogee GT)

1617715348411.png
 
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lobstar

Limp Gawd
Joined
Nov 24, 2004
Messages
237
I decided to check the waterblock with calipers while the cold plate was torqued to 1.8Nm. Measuring from each edge using the Optimus sticker to orient the measurements: North - 21.43mm, East - 21.43mm, South - 21.44mm, West - 21.42mm. That was fully assembled so I understand some variance could come from the top however the cold plate does distort under torque while pressed against the gaskets so I wanted an 'in-use' sort of measurement. The fork of the calipers rests completely flat against the surface of the material so I'm confident it will create a good enough junction between the cold plate and the heat spreader of the cpu.
 

lobstar

Limp Gawd
Joined
Nov 24, 2004
Messages
237
Temps between CCDs are super close with initial testing. Less than 1°C difference at various loads. Still tweaking and playing since getting it setup earlier this evening.
 

lobstar

Limp Gawd
Joined
Nov 24, 2004
Messages
237
Water was at 30C during the tests. I have the AC going so might be able to pull another degree or two off that number.
Edit: Mid run with a data reset. Water at 28C. I'll try again if the water comes down below 25C.
1620148343684.png
 
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