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New results from lapping

post #1 of 7
Thread Starter 
alright, my i7 2600k is running at stock speed + 3.8 turbo boost on all cores @ auto voltage on a P67A-UD4 gigabyte mobo. 45min of prime 95 I was getting 70C on highest core (core #4).

after four hours of lapping and fixed the concaved cpu with 2000 grit on a piece of glass.. temp dropped to 67C (66C sometimes). it's a 5C improve on some core. NOT the 10C+ drop I was looking for. pretty much void my warranty for nothing.

looked into the bios.. set the Vcore at 1.1.. crashed.. set at 1.18V totally stable with all cores running 3.8ghz. temp dropped to a 63C max (60C on core 1). looks like gigabtye ud4 auto gave way too much voltage and caused my CPU to run hot.

a question for your gurus out there. what's the Intel recommended vcore for running turbo boost? is it 1.2 or 1.18? btw my LLC is enabled: that helps to stable voltage at load right? If it doesn't crash and 100% stable is it bad for the CPU to run under recommended vcore?


cheers people!
Edited by gmanparty - 2/11/11 at 10:03pm
post #2 of 7
Yeah, I didn't experience the 10C drop some people claim when I lapped my Q9550 either. But, now that you've successfully lapped it, make sure you apply even less thermal paste now that it will take very little to cover the flat surface.
    
CPUMotherboardGraphicsRAM
i7-2600k Asus P8Z68 Deluxe MSI N250GTS TwinFrozr 1G OC 2x4GB Corsair XMS3 2133 (9-11-10-28) 
CoolingMonitorPowerCase
Corsair H50 Dell U2412HM Corsair TX650W Corsair 650D 
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CPUMotherboardGraphicsRAM
i7-2600k Asus P8Z68 Deluxe MSI N250GTS TwinFrozr 1G OC 2x4GB Corsair XMS3 2133 (9-11-10-28) 
CoolingMonitorPowerCase
Corsair H50 Dell U2412HM Corsair TX650W Corsair 650D 
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post #3 of 7
Thread Starter 
stock vcore anyone? (intel recommeded, not mobo auto)
post #4 of 7
Lapping definitely dropped my Q6600 ~8-10C. What cooler are you using? Have you reseated the heatsink a few times? Lapping will really show a difference on water, on air not so much from my experience.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.9Ghz Gigabyte EP45-UD3P Rev1.0 ASUS GTX470 @ 810/1620/1700 (1.1V) 4GB DDR2 1066 
Hard DriveOptical DriveOSMonitor
WD Caviar Black 1TB ASUS 22x DVD-ROM Windows Vista x64 Dell U2711 
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Corsair 850TX CoolerMaster ATCS840 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.9Ghz Gigabyte EP45-UD3P Rev1.0 ASUS GTX470 @ 810/1620/1700 (1.1V) 4GB DDR2 1066 
Hard DriveOptical DriveOSMonitor
WD Caviar Black 1TB ASUS 22x DVD-ROM Windows Vista x64 Dell U2711 
PowerCase
Corsair 850TX CoolerMaster ATCS840 
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post #5 of 7
Thread Starter 
Quote:
Originally Posted by XCRapid View Post
Lapping definitely dropped my Q6600 ~8-10C. What cooler are you using? Have you reseated the heatsink a few times? Lapping will really show a difference on water, on air not so much from my experience.
h50. seated many times.. used just right amount of AS5. my H50 is slightly convex... when using very thin film of AS5 only 70% of my waterblock is making contact with my 2000grit lapped cpu ( however it is making contact in the middle .. when give it another rice dab of AS5... alll is making contact. still get 61C at 1.18V core at 3.8ghz.
post #6 of 7
61C isn't bad for an H50. Don't take Prime95 temps as a benchmark. Use Prime only to test stability, temps will never get that high while gaming/transcoding.

You might try lapping your H50. I haven't been keeping up with Sandy too much with regards to clocks/temps. You might try the rice method for TIM, as I have had some troubles before with the thin-film method.

Edit:

Yes you want LLC enabled. Also 1.2V is plenty OK for these chips long-term. As long as your temps are under 75C in Prime, you're ok to further your OC.
Edited by XCRapid - 2/11/11 at 11:47pm
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.9Ghz Gigabyte EP45-UD3P Rev1.0 ASUS GTX470 @ 810/1620/1700 (1.1V) 4GB DDR2 1066 
Hard DriveOptical DriveOSMonitor
WD Caviar Black 1TB ASUS 22x DVD-ROM Windows Vista x64 Dell U2711 
PowerCase
Corsair 850TX CoolerMaster ATCS840 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.9Ghz Gigabyte EP45-UD3P Rev1.0 ASUS GTX470 @ 810/1620/1700 (1.1V) 4GB DDR2 1066 
Hard DriveOptical DriveOSMonitor
WD Caviar Black 1TB ASUS 22x DVD-ROM Windows Vista x64 Dell U2711 
PowerCase
Corsair 850TX CoolerMaster ATCS840 
  hide details  
Reply
post #7 of 7
Thread Starter 
Quote:
Originally Posted by XCRapid View Post
61C isn't bad for an H50. Don't take Prime95 temps as a benchmark. Use Prime only to test stability, temps will never get that high while gaming/transcoding.

You might try lapping your H50. I haven't been keeping up with Sandy too much with regards to clocks/temps. You might try the rice method for TIM, as I have had some troubles before with the thin-film method.

Edit:

Yes you want LLC enabled. Also 1.2V is plenty OK for these chips long-term. As long as your temps are under 75C in Prime, you're ok to further your OC.
thanks pal
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