Overclock.net › Forums › Intel › Intel CPUs › Moderate OC of i5 750 to 3.6
New Posts  All Forums:Forum Nav:

Moderate OC of i5 750 to 3.6

post #1 of 8
Thread Starter 
Recently built a new system and not wanting to push it since i don't have the necessary cooling yet(venomous-x coming next week). I've oc slightly to 3.6ghz so far running prime right now for 5 hrs. Are these volts safe for a 24/7 system running?

Vcore= 1.237
vtt=2.75
pll=1.85
pch=1.1.

Well the volt that really concerns me is the vtt right now as i've read around some have it over 3 but intel states not to go over 2.1. I've tried prime with 2.5vtt and after 1-2 test passes i'd get a memory dumping bsod. So i've left it at 2.75 and been adjusting the vcore until i don't get a core stop in prime. Question now is should i lower my Bclk(200) so i can have a lower vtt to have running on a safe 24/7 system?
OaB
(13 items)
 
Improved
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7 875k Evga P55 SLI Evga 9600GSO 4GB Gskill Ripjaws 1600mhz 
Hard DriveOSPowerCase
2x WD 640gig Raid0 Windows 7 Corsair 650tx Antec P180 
CPUMotherboardRAMHard Drive
i7-4770k Asus Z87-pro G.skill 2x8gb 1866mhz Samsung 840 pro 128gb 
CoolingOSPowerCase
Thermal right silver arrow Windows 7 pro x64 Corsair TX650 Corsair graphite 600T 
  hide details  
Reply
OaB
(13 items)
 
Improved
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7 875k Evga P55 SLI Evga 9600GSO 4GB Gskill Ripjaws 1600mhz 
Hard DriveOSPowerCase
2x WD 640gig Raid0 Windows 7 Corsair 650tx Antec P180 
CPUMotherboardRAMHard Drive
i7-4770k Asus Z87-pro G.skill 2x8gb 1866mhz Samsung 840 pro 128gb 
CoolingOSPowerCase
Thermal right silver arrow Windows 7 pro x64 Corsair TX650 Corsair graphite 600T 
  hide details  
Reply
post #2 of 8
I would say that either you mistyped your VTT, or it's extremely high. I run mine with 1.411vcore (load), 1.4vtt, 1.85v pll, 1.1vpch and thats at 4.3ghz.
Slow Poke
(14 items)
 
Daily
(14 items)
 
 
CPUMotherboardGraphicsRAM
Ivy Bridge Asrock Z77 OC formula Too many to choose  A bunch 
Hard DriveOptical DriveCoolingOS
About 8 of them Some Sony DVD-RW Kingpin Cooling Venom 6.66 Stripped XP, Vista, W7, 
MonitorKeyboardPowerCase
AOC 23" $3 generic KB Corsair AX1200 Dimastech Hard Milky White 
MouseMouse Pad
Razer DeathAdder Wow Cataclysm pad 
CPUMotherboardGraphicsRAM
i7 3770k Asus Maximus V Gene MSI GTX 580 Lightning Generic Samsungs 
Hard DriveOptical DriveCoolingOS
Vertex 3 LG Bluray  Ek Supremacy Windows 7 64 
MonitorKeyboardPowerCase
Samsung B2430 OCN Ducky  Seasonic X750 Dimastech Easy Metallic Gray 
MouseMouse Pad
Razer DeathAdder 3G Xtrac Ripper 
  hide details  
Reply
Slow Poke
(14 items)
 
Daily
(14 items)
 
 
CPUMotherboardGraphicsRAM
Ivy Bridge Asrock Z77 OC formula Too many to choose  A bunch 
Hard DriveOptical DriveCoolingOS
About 8 of them Some Sony DVD-RW Kingpin Cooling Venom 6.66 Stripped XP, Vista, W7, 
MonitorKeyboardPowerCase
AOC 23" $3 generic KB Corsair AX1200 Dimastech Hard Milky White 
MouseMouse Pad
Razer DeathAdder Wow Cataclysm pad 
CPUMotherboardGraphicsRAM
i7 3770k Asus Maximus V Gene MSI GTX 580 Lightning Generic Samsungs 
Hard DriveOptical DriveCoolingOS
Vertex 3 LG Bluray  Ek Supremacy Windows 7 64 
MonitorKeyboardPowerCase
Samsung B2430 OCN Ducky  Seasonic X750 Dimastech Easy Metallic Gray 
MouseMouse Pad
Razer DeathAdder 3G Xtrac Ripper 
  hide details  
Reply
post #3 of 8
Quote:
Originally Posted by h2olaf View Post
Recently built a new system and not wanting to push it since i don't have the necessary cooling yet(venomous-x coming next week). I've oc slightly to 3.6ghz so far running prime right now for 5 hrs. Are these volts safe for a 24/7 system running?

Vcore= 1.237
vtt=2.75
pll=1.85
pch=1.1.

Well the volt that really concerns me is the vtt right now as i've read around some have it over 3 but intel states not to go over 2.1. I've tried prime with 2.5vtt and after 1-2 test passes i'd get a memory dumping bsod. So i've left it at 2.75 and been adjusting the vcore until i don't get a core stop in prime. Question now is should i lower my Bclk(200) so i can have a lower vtt to have running on a safe 24/7 system?
Leave pll at lowest value of 1.8
vtt is way too high. try 1.30 or 1.35

With that vcore you can go much further without harming your rig.
I have 3.8ghz at vcore 1.25 right now. Still testing stability...

BCLK 200 x19
Qpi 1.225
ram 1.65
rest at lowest value

So you can probable get 4.0ghz at vcore 1.30 and qpi 1.30-1.35 depending on how high your ram is clocked. Without any damage.
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
post #4 of 8
Thread Starter 
Oh man i must've not gotten enough sleep. You guys were right i had the vtt wrong. It's currently at 1.275 rather and i can't run prime stable at 1.25. Would 1.275 be safe for 24/7 since intel recommended is 1.21? i do plan to keep this system for a few yrs besides a change in gpu at a later time.
Edited by h2olaf - 2/27/10 at 10:49am
OaB
(13 items)
 
Improved
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7 875k Evga P55 SLI Evga 9600GSO 4GB Gskill Ripjaws 1600mhz 
Hard DriveOSPowerCase
2x WD 640gig Raid0 Windows 7 Corsair 650tx Antec P180 
CPUMotherboardRAMHard Drive
i7-4770k Asus Z87-pro G.skill 2x8gb 1866mhz Samsung 840 pro 128gb 
CoolingOSPowerCase
Thermal right silver arrow Windows 7 pro x64 Corsair TX650 Corsair graphite 600T 
  hide details  
Reply
OaB
(13 items)
 
Improved
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7 875k Evga P55 SLI Evga 9600GSO 4GB Gskill Ripjaws 1600mhz 
Hard DriveOSPowerCase
2x WD 640gig Raid0 Windows 7 Corsair 650tx Antec P180 
CPUMotherboardRAMHard Drive
i7-4770k Asus Z87-pro G.skill 2x8gb 1866mhz Samsung 840 pro 128gb 
CoolingOSPowerCase
Thermal right silver arrow Windows 7 pro x64 Corsair TX650 Corsair graphite 600T 
  hide details  
Reply
post #5 of 8
Quote:
Originally Posted by h2olaf View Post
Oh man i must've not gotten enough sleep. You guys were right i had the vtt wrong. It's currently at 1.275 rather and i can't run prime stable at 1.25. Would 1.275 be safe for 24/7 since intel recommended is 1.21? i do plan to keep this system for a few yrs besides a change in gpu at a later time.
As long as you keep it below 1.30-1.35 you'll be fine. Above that you'll be in the grey zone in terms of lifespan.
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
post #6 of 8
Thread Starter 
I change a bit of the settings i had above. Now i have the bclk at 180*20 which puts the dram at 721.2mhz with a 2:8 divider and vtt at 1.2 now and same vcore. So far i'm running prime and been stable for 4 and half hrs now. Is it wise to have the dram freq lower than the specs from the manufactor? I was just concerned of having the vtt over the recommended by intel to make the change. only way to have a lower vtt was to lower he bclk or so it seems.
OaB
(13 items)
 
Improved
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7 875k Evga P55 SLI Evga 9600GSO 4GB Gskill Ripjaws 1600mhz 
Hard DriveOSPowerCase
2x WD 640gig Raid0 Windows 7 Corsair 650tx Antec P180 
CPUMotherboardRAMHard Drive
i7-4770k Asus Z87-pro G.skill 2x8gb 1866mhz Samsung 840 pro 128gb 
CoolingOSPowerCase
Thermal right silver arrow Windows 7 pro x64 Corsair TX650 Corsair graphite 600T 
  hide details  
Reply
OaB
(13 items)
 
Improved
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7 875k Evga P55 SLI Evga 9600GSO 4GB Gskill Ripjaws 1600mhz 
Hard DriveOSPowerCase
2x WD 640gig Raid0 Windows 7 Corsair 650tx Antec P180 
CPUMotherboardRAMHard Drive
i7-4770k Asus Z87-pro G.skill 2x8gb 1866mhz Samsung 840 pro 128gb 
CoolingOSPowerCase
Thermal right silver arrow Windows 7 pro x64 Corsair TX650 Corsair graphite 600T 
  hide details  
Reply
post #7 of 8
I don't think the i5 can handle VTT voltage as well as the i7s, I wouldn't go over 1.25 for long-term usage.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5-750 @ 4GHz 1.34v Asus Maximus III Formula SLI GTX 480 @ 800 / 1600 / 2000 - 1.050v 8GB XMS3 DDR3 1268 C7 1T 
Hard DriveOptical DriveOSMonitor
Vertex 30GB, WD 640GB, 2* F3 1TB Optiarc AD-7241S Windows 7 Ultimate x64 / OSX Snow Leopard 10.6.4 Asus VG236H 23" 120Hz + VH242H 23.6" 
KeyboardPowerCaseMouse
Logitech G15 CM Silent Pro Gold 1200W HAF 932 Logitech G500 
Mouse Pad
Razer Sphex 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5-750 @ 4GHz 1.34v Asus Maximus III Formula SLI GTX 480 @ 800 / 1600 / 2000 - 1.050v 8GB XMS3 DDR3 1268 C7 1T 
Hard DriveOptical DriveOSMonitor
Vertex 30GB, WD 640GB, 2* F3 1TB Optiarc AD-7241S Windows 7 Ultimate x64 / OSX Snow Leopard 10.6.4 Asus VG236H 23" 120Hz + VH242H 23.6" 
KeyboardPowerCaseMouse
Logitech G15 CM Silent Pro Gold 1200W HAF 932 Logitech G500 
Mouse Pad
Razer Sphex 
  hide details  
Reply
post #8 of 8
Quote:
Originally Posted by Salami991 View Post
I don't think the i5 can handle VTT voltage as well as the i7s, I wouldn't go over 1.25 for long-term usage.
This.
Could be right.
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › Moderate OC of i5 750 to 3.6