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Struggling getting i5 750 to 4ghz

post #1 of 5
Thread Starter 
Hey guys I have been having alot of trouble overclocking my cpu, it appears only when I set the cpu pll voltage to over 1.9 it appears stable then but got told over 1.8 is unsafe and wears the cpu out quickly.
I have GA-P55A-UD4 mobo, i5 750 quad core, ocz platinum 1333mhz ram running at 1528mhz 8-8-8-24
Here are some pictures of my bios settings
http://img837.imageshack.us/i/gedc0099.jpg
http://img197.imageshack.us/i/gedc0101.jpg
http://img3.imageshack.us/i/gedc0102j.jpg
Hope you guys can help, thanks.
My System
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Intel I7 4770k @ 4.5ghz MSI PC MATE Z97 EVGA gtx 780ti Samsung green 8gb 30nm 
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My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7 4770k @ 4.5ghz MSI PC MATE Z97 EVGA gtx 780ti Samsung green 8gb 30nm 
Hard DriveHard DriveOSMonitor
Crucial M4 128GB OCZ vertex 4 128gb Windows 7 64bit BenQ G2420HDBL LED Monitor 
KeyboardPowerCaseMouse
Microsoft Sidewinder X6 Antec TruePower Moduler 750w Zalman z9 plus Microsoft Sidewinder X8 Wireless 
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post #2 of 5
Try upping Vcore an VTT more.
The Liberator
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Core I5-750 @4Ghz (191x21) w 1.40v IMC @1.3v 24/7 ASUS P7P55D-E Pro SATA3 USB3.0 1002 BIOS EVGA GTX 580 @900/1800/2100 with 1.1v 4 GB GSkill Trident DDR3 2000 @1910 8-8-8-21 1T 
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2 Samsung 1TB F3s in 2 RAID0 arrays LG 10X Blu Ray Drive Windows 7 Ultimate 64 (Fully Tweaked) Samsung T260 26" LCD 1920x1200 5ms 
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The Liberator
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core I5-750 @4Ghz (191x21) w 1.40v IMC @1.3v 24/7 ASUS P7P55D-E Pro SATA3 USB3.0 1002 BIOS EVGA GTX 580 @900/1800/2100 with 1.1v 4 GB GSkill Trident DDR3 2000 @1910 8-8-8-21 1T 
Hard DriveOptical DriveOSMonitor
2 Samsung 1TB F3s in 2 RAID0 arrays LG 10X Blu Ray Drive Windows 7 Ultimate 64 (Fully Tweaked) Samsung T260 26" LCD 1920x1200 5ms 
KeyboardPowerCaseMouse
I-ROCKS KR-6820E-BK Back-lit Gaming Keyboard Corsair AX 850 Gold CoolerMaster ATCS 840 Black +Silverstone CFP51 bay Logitech G5 original 
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post #3 of 5
That's a pretty hefty RAM overclock. Set the system memory multi to 6.

I wouldn't go over 1.88v on the PLL and it is doubtfull anything over 1.8v is doing you any good.

Might have to raiese the DDR Voltage. I'd just set it to what your kit is rated at.

I'd take LLC out of auto and run it enable or disable whichever one you prefer but not auto. Either way should take about the same load voltage.

VTT might be a little low for 4.0. Wouldn't be suprised if you needed to bump it up closer to 1.3v

Also I'd lock in the DRAM timings. Start with either stock spec for the kit or something nice and loose like 9-9-9-24.
Monster IIr
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Tinker
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i5 3570K ASRock Z77 Extreme6 MSI R7970 G.SKILL Ripjaws X 
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Samsung Cogage Arrow Windows 7 Alienware AW2310 
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Dell ST2410 BlackWidow Ultimate Corsair 850TX CM Sniper 
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Corsair M60 FUNC X-Fi Titanium HD  Sennheiser PC360 
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i5 760 EVGA P55 FTW XFX 5850 Mushkin Blackline 4GB 
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Caviar Blue 640 Asus Corsair A70 Windows 7 
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Dell ST2410 Rosewill RK-800G Seasonic M12II 620 NZXT Gamma 
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Monster IIr
(20 items)
 
Tinker
(16 items)
 
 
CPUMotherboardGraphicsRAM
i5 3570K ASRock Z77 Extreme6 MSI R7970 G.SKILL Ripjaws X 
Hard DriveHard DriveHard DriveHard Drive
WD Black 640GB Crucial M4 SSD Corsair 840 SSD Seagate  
Optical DriveCoolingOSMonitor
Samsung Cogage Arrow Windows 7 Alienware AW2310 
MonitorKeyboardPowerCase
Dell ST2410 BlackWidow Ultimate Corsair 850TX CM Sniper 
MouseMouse PadAudioAudio
Corsair M60 FUNC X-Fi Titanium HD  Sennheiser PC360 
CPUMotherboardGraphicsRAM
i5 760 EVGA P55 FTW XFX 5850 Mushkin Blackline 4GB 
Hard DriveOptical DriveCoolingOS
Caviar Blue 640 Asus Corsair A70 Windows 7 
MonitorKeyboardPowerCase
Dell ST2410 Rosewill RK-800G Seasonic M12II 620 NZXT Gamma 
MouseMouse PadAudioAudio
Logitech G500 Func Archetype 1030 ASUS XONAR_DG JVC HA-RX700 
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post #4 of 5
sub'd cuz I can't get mine past anything lol...
post #5 of 5
It is your ram overclock that is holding back your cpu overclock. Choose which you feel is more important to you and adjust.
Foggy Memories
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i5 750 @ 4ghz 1.2v EVGA P55 SLI EVGA 660 SC G.Skill 2x4GB Ripjaw 1600 
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crap-ton of bytes Venomous X Win 7 Ultimate 64bit 24" 
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Foggy Memories
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5 750 @ 4ghz 1.2v EVGA P55 SLI EVGA 660 SC G.Skill 2x4GB Ripjaw 1600 
Hard DriveCoolingOSMonitor
crap-ton of bytes Venomous X Win 7 Ultimate 64bit 24" 
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Antec Truepower New 750w Rocketfish Fulltower modded Logitech G600 
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