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i7 9700k Lapping Project

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post #1 of 11 (permalink) Old 05-18-2019, 04:50 PM - Thread Starter
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i7 9700k Lapping Project

So I have been contemplating this idea for awhile now and pulled the trigger on a whim because I was bored. My 16 month old daughter doesn't allow me much time so this wont be as detailed as I would like. The before pictures are absent as I did this project late at night. I know that this voids the warranty and you might ask why not delid? Well, I have lapped before and I am comfortable doing it (Last with Q6600) and I don't want to risk damaging the chip. Lastly, from what I have read, the temp differences between lapped and delidded are a few degrees. I don't have enough thermal issues to need the extra temp drops.

Relevant specs:
Intel i7 9700k @5.0 Ghz 1.314v
Asus Z370-A Prime
G Skill DDR4 @3602 XMP2 1.350v
Uncore- 47
H150i Pro 3x120 ML Push/ 3x120 LL Pull, 3x120 LL Exhaust.
MX4- Thermal compound

I wanted to go quiet if possible all fans are AIO temp dependent:

Temp/RPM
26c - 656
30c - 926
32c - 1180
34c - 1444
36c - 1706
40c+ - 2600

Before lapping, idle temps were 31-33c and @ 100% averaged 68c

After: Idle 28-30c and 100% averaged 56c

Here goes (Don't beat me up too badly)

Setup



Beginning 600 Grit



Appeared to be really concave



2nd 600 grit pass.



Start of 1200 grit.



End 1200 Grit.



First Pass 2000 Grit.




End Result first pass



2nd pass 2000 grit



End result




Mounted



Idle



30 Minutes




Think it worked out very well. Was fun to do as well.
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9658 Time Spy https://www.3dmark.com/spy/7167565
White Lightning
(12 items)
CPU
i7 9700k
Motherboard
ASUS Prime Z390-A
GPU
Gigabyte RTX 2070 White Windforce OC
RAM
GSkill TridentZ DDR4 3600
Hard Drive
Samsung EVO 970
Power Supply
EVGA
Cooling
Corsair H100i Pro
Case
Fractal Design Meshify C White MID ATX
Operating System
Windows 10 Home
Monitor
Samsung U28E570D 28"
Keyboard
Loigitech G910
Mouse
Logitech G700s
▲ hide details ▲

Last edited by Avacado; 05-19-2019 at 06:27 AM.
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post #2 of 11 (permalink) Old 05-18-2019, 06:35 PM
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Aren’t you supposed to lap the actual cpu die though?
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post #3 of 11 (permalink) Old 05-18-2019, 07:34 PM - Thread Starter
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Quote: Originally Posted by MrHarris View Post
Aren’t you supposed to lap the actual cpu die though?
Yes I could have, but that would have required delidding, which I said I didn't feel comfortable doing.

9658 Time Spy https://www.3dmark.com/spy/7167565
White Lightning
(12 items)
CPU
i7 9700k
Motherboard
ASUS Prime Z390-A
GPU
Gigabyte RTX 2070 White Windforce OC
RAM
GSkill TridentZ DDR4 3600
Hard Drive
Samsung EVO 970
Power Supply
EVGA
Cooling
Corsair H100i Pro
Case
Fractal Design Meshify C White MID ATX
Operating System
Windows 10 Home
Monitor
Samsung U28E570D 28"
Keyboard
Loigitech G910
Mouse
Logitech G700s
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post #4 of 11 (permalink) Old 05-18-2019, 08:09 PM
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Goddamn that mirror finish is gorgeous. The images that show your temps aren't too clear though. Would you mind sharing the before-and-after temps in text form, please?

Thanks so much, and congrats on a job well done =)
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post #5 of 11 (permalink) Old 05-19-2019, 02:05 PM
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Really looks nice. How long does it take to do this?

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post #6 of 11 (permalink) Old 05-19-2019, 02:06 PM
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nice! I haven't lapped since the 775 days.

Intel i9 9900K Coffee Lake @ X8 5309mhz (+47.5%)
AMD FX-8320 Vishera @ X4 5022mhz (+43.5%)
Intel i5 4690K Haswell @ X4 5013mhz (+43.2%)
AMD X4 960T Zosma @ X6 4870mhz (+62.3%)
Intel i7 6700 Skylake @ X4 4709mhz (+38.5%)
Intel i5 6400 Skylake @ X4 4588mhz (+69.9%)
2 OP pls nerf
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i9 9900K
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post #7 of 11 (permalink) Old 05-20-2019, 03:16 AM - Thread Starter
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Quote: Originally Posted by Luck100 View Post
Really looks nice. How long does it take to do this?
Took me about 30 minutes total, actual lapping maybe 15.

9658 Time Spy https://www.3dmark.com/spy/7167565
White Lightning
(12 items)
CPU
i7 9700k
Motherboard
ASUS Prime Z390-A
GPU
Gigabyte RTX 2070 White Windforce OC
RAM
GSkill TridentZ DDR4 3600
Hard Drive
Samsung EVO 970
Power Supply
EVGA
Cooling
Corsair H100i Pro
Case
Fractal Design Meshify C White MID ATX
Operating System
Windows 10 Home
Monitor
Samsung U28E570D 28"
Keyboard
Loigitech G910
Mouse
Logitech G700s
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post #8 of 11 (permalink) Old 05-20-2019, 03:17 AM - Thread Starter
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Quote: Originally Posted by The Pook View Post
nice! I haven't lapped since the 775 days.
I hear you, I haven't since the Q6600. Thing is, after all these years the IHS is still really concave, makes no sense.

9658 Time Spy https://www.3dmark.com/spy/7167565
White Lightning
(12 items)
CPU
i7 9700k
Motherboard
ASUS Prime Z390-A
GPU
Gigabyte RTX 2070 White Windforce OC
RAM
GSkill TridentZ DDR4 3600
Hard Drive
Samsung EVO 970
Power Supply
EVGA
Cooling
Corsair H100i Pro
Case
Fractal Design Meshify C White MID ATX
Operating System
Windows 10 Home
Monitor
Samsung U28E570D 28"
Keyboard
Loigitech G910
Mouse
Logitech G700s
▲ hide details ▲
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post #9 of 11 (permalink) Old 05-20-2019, 03:31 AM
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Looks great, have you checked the flatness of the coldplate on your CLC as well? Those aren't always flat either.
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post #10 of 11 (permalink) Old 05-20-2019, 04:23 AM
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That is quite an improvement!

I too haven't lapped since the 775 days. Still have the 2000 grit sandpaper tucked away though just in case.


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i7 9700k , i7 9700k lapped , lap , lapped , Lapping

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