Old Lynnfield (i7 875K) delidded with procedure pics =D - Overclock.net - An Overclocking Community

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Old Lynnfield (i7 875K) delidded with procedure pics =D

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post #1 of 23 (permalink) Old 09-13-2016, 06:32 PM - Thread Starter
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EDIT (07/02/2017): A month later I managed to get 4295MHz - 204x21 @ 1.584vcore/1.35vtt (rly rly crappy chip), ibt, aida64 and prime95 stable, 90ºC. The chip works fine till this very day. Upgraded the CPU cooler to a CoolerMaster Masterliquid 240 in June. Using Arctic MX4.

Disclaimer: I cannot be held responsible for any damange you may cause to your hardware. Follow these steps at your own risk and, if you do, take your time and do not rush to get it done. This is for CPUs that have soldered IHS only.

So I purchased a CoolerMaster Seidon 120V this week. It was CHEAP. When I installed it I got a little (very) disappointed. My temps where about the same as with my old Hyper 212+. 90/95ºC @ 4000MHz 133x30 1.3875vcore in IntelBurnTest.

A lot of people say that it is not worth it to delid a soldered IHS, because you already have a good thermal conductivity and you could ruin the CPU (which is true if you don't take your time and do it VERY carefully) but I thought "what the hell, let's do it now that I don't have a huge cooler on top of my CPU".

So yeah, I delidded my i7 875K and wanted to share it with you.

Here's how I've done it and some pic's =]

Using gloves not to shock my CPU I got a very thin blade and started cutting the epoxy glue that holds the IHS. I started with the corners.


Then, after cutting through all the glue, I inserted some pieces of the same blade in all corners to create some pressure upwards on the IHS.



(This is an old Pentium D to illustrate) Then I put the cpu top down on the stove, making sure it was preheated, with the actual blades inserted. This ensures that when the solder melts, the IHS will separate from the die with a pop. 5~6 seconds is enough to melt the solder and not ruin the CPU.


And voilá, a delidded Lynnfield! =D


I had also to remove the retention bracket in order to fit the waterblock and make it touch the die. Because the CPU got thinner the die was below the bracket.



Apply some thermal paste (this is the one that came with the Seidon)



Had to put some springs between the screws and the waterclock retention mechanism because I wasn't getting enough pressure on the die and it was also uneven.


The thing working.


Look at those temps!!!!!!!!!!!!!!!!!!!!! Notice the CPU is working at 4088MHz not 4000! yay! I know, only about 2 minutes of stress testing, but I used to get 95º like 10 seconds after I started the test. So much for good thermal conductivity with soldered IHS...


I'll post some real screenshots later, I was testing higher overclocks and stuff. BTW this thing is extremely power hungry, can't get above 4145MHz without bumping the vcore to 1.5v which I guess isn't safe. For now I got 4145MHz 133x31 @ 1.44vcore. 80ºC. Any ideas on how to get higher overclocks much appreciated! Do you think that mirror polishing the waterblock would change things for better?

I'm curious about one thing though. Take a look at my i7 and an old Celeron D which I used to practice the procedure. The i7 doesn't seem to have solder, but some kind of TIM and it was also easy to clean off with acetone. If someone knows what that's about, please tell me ^^ Also, take a look at those ripples on the i7 die, my guess is that whatever sits between the die and the IHS, wasn't making total contact.



Thinking about shooting a video showing how to delid a soldered CPU, what do you guys think?

So that's it, thanks for reading! =P
Cheers!

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post #2 of 23 (permalink) Old 09-14-2016, 10:52 AM - Thread Starter
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[Official] Delidded Crewman
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Xeon X5680 @ 4.35GHz @ 1.46V
Motherboard
ASUS Sabertooth X58
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RAM
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Hard Drive
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Hard Drive
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Cooling
CoolerMaster Master Liquid 240
Case
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Operating System
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GPU
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Operating System
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Motherboard
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GPU
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post #3 of 23 (permalink) Old 09-14-2016, 05:39 PM
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post #4 of 23 (permalink) Old 09-14-2016, 05:56 PM
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Im dissapointed. My lower i7 870 was at 4ghz on less volts. 1.3v core with a 200mhz x 20multi. Rovk solid for the past 5 years. Think you got a dud.

But thats some awesome work deliding. I wouldnt of thought of doing it that way.


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post #5 of 23 (permalink) Old 09-14-2016, 06:00 PM - Thread Starter
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Quote:
Originally Posted by bobfig View Post

Im dissapointed. My lower i7 870 was at 4ghz on less volts. 1.3v core with a 200mhz x 20multi. Rovk solid for the past 5 years. Think you got a dud.

But thats some awesome work deliding. I wouldnt of thought of doing it that way.

no, IM disappointed, but its silicon lottery I guess. And yes, i've seen most i7 8xx achieve 4GHz @ 1.33/1.35v. Good chip you have there, delid yours and be happy =]

The thing here, though, is not the overclocking per se but the delidding of a soldered CPU and temp gains. The overclock itself sucks, I am aware of that. Oh, but I should say: i didn't try lowering the voltage @ 4GHz after delidding. Maybe, just maybe, I had to use such high voltages because of the Hyper 212+. There are a huge gaps between the heatpipes that I never quite understood the reason CoolerMaster made it that way.

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post #6 of 23 (permalink) Old 09-14-2016, 06:04 PM
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Quote:
Originally Posted by manhattan222 View Post

no, IM disappointed, but its silicon lottery I guess. And yes, i've seen most i7 8xx achieve 4GHz @ 1.33/1.35v. Good chip you have there, delid yours and be happy =]

The thing here, though, is not the overclocking per se but the delidding of a soldered CPU and temp gains. The overclock itself sucks, I am aware of that.

I actually just took mine out as i just went skylake 6700k. Not sure what im going to do with those parts. At the moment im ether selling so i can get a 1070 or build another computer for parents/sister.


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post #7 of 23 (permalink) Old 09-14-2016, 09:00 PM
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Another fan and Kryonaut or liquid metal may help push it a little higher.
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post #8 of 23 (permalink) Old 09-16-2016, 12:08 AM - Thread Starter
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Quote:
Originally Posted by Kana Chan View Post

Another fan and Kryonaut or liquid metal may help push it a little higher.

Already using 2 fans^^ the second one didn't appear in the photo. Gonna get some liguid pro soon, maybe i'll get a 3c headroom :v

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post #9 of 23 (permalink) Old 09-16-2016, 12:30 AM
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Throwing it on the stove top looks dicey. How do you get it off the burner once it's popped and sitting in the inferno smile.gif I wonder if a small butane torch would work as the heat source. If it works, you could focus the heat more specifically on area needed (less risk of damage to other parts of the package) and you could pull the torch away the moment it goes pop (without having to stick your hand into a fire).

Better paste would probably score a few degrees more.

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post #10 of 23 (permalink) Old 09-16-2016, 02:02 AM - Thread Starter
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Quote:
Originally Posted by michael-ocn View Post

Throwing it on the stove top looks dicey. How do you get it off the burner once it's popped and sitting in the inferno smile.gif I wonder if a small butane torch would work as the heat source. If it works, you could focus the heat more specifically on area needed (less risk of damage to other parts of the package) and you could pull the torch away the moment it goes pop (without having to stick your hand into a fire).

Better paste would probably score a few degrees more.

The fire got nowhere near the chip, so I wouldn't worry much about that, the burner in this case is very large, and I set the fire to the lowest. You could also preheat the stove and put out the fire just before putting the chip on the burner and see if the heat is enough, which I guess it is. As of how I did to remove the chip from the stove, I simply picked it up with a pair of pliers and let it cool down. I put it on the stove the same way, with pliers.

I guess you could use a butane torch, though, but the fact is that I didn't want to use fire directly on the CPU. You could also use a hot clothes iron in the same way as with the stove or even a lighter. But then again, I'm not comfortable with using fire directly on the chip. Also, it's an integrated heat SPREADER so I guess focusing the heat isn't gonna make much of a difference anyways.

Cheers!

[Official] Delidded Crewman
[Official]AMD RX 480/ 470/ 460 Owners Club
Westmere-EP
(12 items)
CPU
Xeon X5680 @ 4.35GHz @ 1.46V
Motherboard
ASUS Sabertooth X58
GPU
XFX RX Vega 56 1570/1100 @ 1V
RAM
3x8GB Corsair Vengeance 1866 @ 1307 7-7-7-18-1T
Hard Drive
Kingston A400 120GB SSD
Hard Drive
Samsung 1TB 5400RPM HDD
Hard Drive
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Cooling
CoolerMaster Master Liquid 240
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CoolerMaster HAF 932 Black Edition
Operating System
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CPU
Core i7 4800MQ 2.7GHz @ 3.7GHz / 1.21V
GPU
Quadro K1100M @ 1250/2200
RAM
8GB DDR3 1600MHz
Hard Drive
Sandisk 120GB SSD
Operating System
Windows 10 Pro
CPU
Intel Pentium 3-S Tuallatin 1400MHz @ 1837MHz @ 1.75V (175x10.50)
Motherboard
ASUS TUSL-2C - vNB mod
GPU
ATI Radeon 9600Pro 256MB DDR2 580/365
GPU
3dfx Voodoo2
RAM
Crucial 512MB SDR 133MHz @ 175MHz
Hard Drive
80GB Samsung SpinPoint 7200RPM
Cooling
CoolerMaster Seidon 120V
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