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Delidding Vs. Lapping a CPU

post #1 of 7
Thread Starter 
I see frequent discussions about these topics, how does one determine if they want to Delid or Lapp the CPU? Is there Pros and Cons over each other?
Monster
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Monster
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post #2 of 7
It's not a matter of deciding between Pros and Cons or anything like that; it's whatever is necessary. Many Ivy Bridge CPUs need to be delidded in order to have more normal temperatures. Such a CPU could be lapped absolutely perfectly and it would still have temps that are too high.

When it comes to lapping, it's sometimes a matter of a desire for lower temps, and other times it's necessary. it's necessary when top of the IHS is so imperfect that there's nothing that can be done to improve temps outside of lapping.

So, if an Ivy Bridge CPU is delidded perfectly but the temps are still bad, then this could mean that either the heatsink or the CPU's IHS needs to be lapped. To tell, you just use perfect straight edge like a razor blade and then see if light passes underneath.
It's a computer!
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It's a computer!
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i5-2500K @ 4.5GHz (1.400-1.424V in Manual Mode) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:) 250 GB Samsung 840 EVO (D:) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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post #3 of 7
Thread Starter 
Awesome,

Thanks for clearing this up for me biggrin.gif
Monster
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Intel Core i5 4670K @ 4.0Ghz ASRock Z87 Extreme4  EVGA GeForce GTX 980 SC 16GB G.SKILL Ripjaws (4 x 4GB) 
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Western Digital Blue 1TB Samsung 850 PRO Western Digital Blue 1TB NZXT Kraken X61 
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Windows 10 Pro Asus VG248QE Samsung Syncmaster 2494 LG LF5600 42-Inch 1080p LED TV 
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Logitech G710 Seasonic Platinum 660XP 660W NZXT H440 Logitech G502 Proteus Core 
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Monster
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Intel Core i5 4670K @ 4.0Ghz ASRock Z87 Extreme4  EVGA GeForce GTX 980 SC 16GB G.SKILL Ripjaws (4 x 4GB) 
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Western Digital Blue 1TB Samsung 850 PRO Western Digital Blue 1TB NZXT Kraken X61 
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Windows 10 Pro Asus VG248QE Samsung Syncmaster 2494 LG LF5600 42-Inch 1080p LED TV 
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Logitech G710 Seasonic Platinum 660XP 660W NZXT H440 Logitech G502 Proteus Core 
Mouse PadAudioAudio
Glorious Extended Gaming Mouse Mat Klipsch Promedia 2.1 Sennheiser HD 558 
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post #4 of 7
You're welcome, Mr. Bean! hehe
It's a computer!
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Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:) 250 GB Samsung 840 EVO (D:) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.400-1.424V in Manual Mode) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:) 250 GB Samsung 840 EVO (D:) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #5 of 7
I was a big proponent of lapping back in the A64 to C2D/Q days, but the newer CPUs simply don't seem to need it. With my FX-51 Iknocked off oover8C by llapping the CPU (up to 8000grit) and HSF, but I have never seen more than a 1-2deg difference with modern processors. I have a collection of older CPUs I'm getting ready for some HWBot benchin, rranging from P3/P4 to P-DC and Athlon XP/64 to 64X2 and C2D. I have been lapping some of them, as their IHS are awfu, but it really is a PITA and not worth it for a modern processor under warranty.
   
Z77 Bench-a-lot
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Z77 Bench-a-lot
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i7 3930K @ 4.92Ghz Asus Rampage 4 Extreme EVGA GTX670 FTW 2GB  EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 
GraphicsRAMHard DriveHard Drive
EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 16GB G.Skill Ripjaws-Z @ DDR3-2248 9-10-9-26 1T Samsung 830 256GB SSD WD10EZEX 1TB HDD 
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WD10EALX 1TB HDD Seagate Barracuda 7200.14 1TB WD3200AAKS 320GB HDD WD5000HHTZ 10krpm 500GB VelociRaptor 
Optical DriveCoolingCoolingCooling
LG/Hitachi Slim DVD-R/W Custom MB-Backside VRM-sinks (Copper) 3x NZXT RF-FX140LB 1-2krpm 98.3CFM Case Fans 2x Corsair SP120-PE Case Fans 
CoolingCoolingCoolingCooling
Heatkiller GTX680 "Hole Edition" Block + Backplate XSPC Single-Bay Res (Single 5.25 bay) EK Multioption Res X2 - Advanced 150 DD "Fill-Port Res" + Fill-Port Fitting (Red) 
CoolingCoolingCoolingCooling
2x MCP35X + Heatsinks/80x15mm Fan XSPC EX420 Alphacool NeXXos UT60 240 6x Bgears Blasters 140mm 1800rpm Fans 
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R.A.T.3 + MX510 My Desk GRADO RS1i Headphones Grado PS1000 Headphones 
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post #6 of 7
tisk tisk tisk.

You should delid and then run your CPU with direct die cooling. thumb.gif
Yin&Yang
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Soon
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Yin&Yang
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Soon
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post #7 of 7
delid to fix internal imperfections (crappy tim).....lap to fix external imperfections (uneven ihs/base/etc)
 
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