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require expert opinion to overclock i7 870 @ 4ghz

post #1 of 7
Thread Starter 
Im using lynfield core i7 870 in a asus P55D E-lx motherbord and i have aftermarket cooler too . I want to overclock this cpu at 4.00ghz . Please i want to know these things

Cpu voltage = ?
Cpu PLL voltage = ?
IMC /VTT = ?
Ram voltage = ?
SHould i disable C state ?
Should i use 24x multuplier or 20 ?
what would be the safe BLCK ?

please anyone doing 4 ghz in asus p55 motherbord... please help
post #2 of 7
I'm afraid it isnt that simple, you need to do the work yourself.
This guide will get you started.
http://www.xbitlabs.com/articles/mainboards/display/asus-p7p55d-deluxe.html
Hi5
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Hi5
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 750 4.0ghz @ 1.36v Asus P7P55D 5850 @ 970/1200 G.SKILL 4Gb 1600-7-8-7 @ 1900-7-9-7-24-1T 
Hard DriveOSMonitorKeyboard
Intel X25-V 40Gb + 1Tb Windows 7 x64 2x24" Samsung Syncmaster Cherry G80-3000LSCGB-2 (Mx- Blue) 
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post #3 of 7
I have a i7-870 at 4.11Ghz

Cpu voltage 1.4
IMC 1.15
RAM Voltage 1.61

BLCK 171 Mhz
RAM 1720 MHz (rated 2000MHZ 9,10,9,27 1.65V) I run lower timings and lower voltage at 1720MHz
24x Multiplier
 
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I7-3820 Asus Sabertooth x79 Nvidia Gtx 680 G.skill RipjawsZ 
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Intel SSD Cheap DVD burner Costum Watercooling 280+120 rad EK supreme HF C... Win 7 
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i7-870 Asus P5P55D le msi 560ti  Corsair XMS3 
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Folder
(16 items)
 
 
CPUMotherboardGraphicsRAM
I7-3820 Asus Sabertooth x79 Nvidia Gtx 680 G.skill RipjawsZ 
Hard DriveOptical DriveCoolingOS
Intel SSD Cheap DVD burner Costum Watercooling 280+120 rad EK supreme HF C... Win 7 
MonitorKeyboardPowerCase
27 Benq 1920 1080 Logitech Gaming Keyboard G105 Chieftech Nitro Series NZXT phantom 410 midi tower 
MouseMouse PadAudio
Logitech G9X big Creative SB X-Fi GO! Pro 
CPUMotherboardGraphicsRAM
i7-870 Asus P5P55D le msi 560ti  Corsair XMS3 
RAMHard DriveOptical DriveCooling
corsair xms3 1tbcrap Cheap DVD burner Corsair h60 
OSMonitorKeyboardPower
win7 tv cheap 550W 
CaseMouseMouse PadAudio
CM something cheap share mousepad with my main rig mobo 
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post #4 of 7
I have this combination that sits comfortably @ 4GHz.Asus P7P55D-E Pro motherboard. i7 870 - 16GB 1600MHz Kingston HyperX -
post #5 of 7
ATI HD6970 2GB, Noctua NH-U12P-SE2 Performance CPU Cooler and system powered by an Antec 650W PSU.

AI Tweaker
AI Overclock Tuner - Manual
OC From Level Up - Auto
CPU Ratio Setting - 20.0
Intel Speedstep Tech - Enabled
Xtreme Phase Full Power Mode - Auto
BCLK Frequency - 200
PCIE - 103
DRAM Frequency - DDR3 1600MHz
QPI Frequency - Auto
ASUS/3RD Party UI Priority - ASUS Utility
OC Tuner - Turbo Mode
DRAM Timing Control - (I left this @ default ; 9 - 9 - 9 - 24)
CPU Differential Amplitude - Auto
CPU Clock Skew - Auto
CPU Voltage - Manual
--- Fixed Voltage - 1.38125
IMC Voltage - 1.30
DRAM Voltage - 1.65
CPU PLL Voltage - 1.8
PCH Voltage - Auto
DRAM Data REF Voltage on CHA - Auto
DRAM Data REF Voltage on CHB - Auto
Load-Line Calibration - Enabled
CPU Spread Spectrum - Enabled
PCI Spread Sprectrum - Auto

CPU Configuration
CPU Ratio Setting is [20]. Everything else is set to Enabled/All except for C1E Support, Max CPUID Value Limit, Intel CSTATE TECH and A20M which are set to Disabled.


Hope this helps :-)
post #6 of 7
Operating system is Windows 7 x64 and my temperatures are around 70 degrees celsius when priming all cores at 100% via prime95 x64.
post #7 of 7
I have a i7 870 3.8 with ht running very smoothly and idles around 42c on a p7p55d with a noctua cooler.

heres the link:

http://www.overclock.net/t/1390320/just-got-my-i7-870-2-93-overclocked-to-3-8-ht-on#post_20104724
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