Overclock.net › Forums › Intel › Intel CPUs › Help Overclocking E8400
New Posts  All Forums:Forum Nav:

Help Overclocking E8400

post #1 of 11
Thread Starter 
Ive been trying for a few days to OC my E8400 but havn't had much luck. Im really confused about voltages how to measure them and what vcore to use..and what the default vcore is for this chip.....
Ive Got my E8400 to 3.4Ghz right now at 1.25v ,, it's not prime stable though

In CPUz at idle my vcore is only 1.200 and under load 1.1875,, now i was wondering what number i should be most concerned with ,, the voltage that i set in my bios or the actual voltages that cpuz reports,

Also i was under the assumption that the default vcore for the E8400 was 1.1875 volts,, but if i set my voltage to default in the bios at 3.4ghz, cpuz tells me it's running at 1.255 at idle??to get that vcore in windows i have to set my voltages to 1.3v in the bios... ?? Im running an Asus P5k

If anyone could help clear up my confusion id appreciate it

Thanks
Edited by parsons256 - 5/28/08 at 11:10am
post #2 of 11
1.875v will destroy an E8400 in minutes without sub-ambient cooling.

The voltage you set in BIOS is the VID. At idle in CPU-Z you see the set VID minus v offset, underload it's VID - voffset -vdroop. The set VID (on a board with a working vdroop) is essentially the voltage that the chip should never exceed.

Load voltage in CPU-Z is what you should be most concerned with. For an E8400, you should keep this under 1.4v if at all possible.

Anyway, most E8400s should be fully capable of 3.4GHz without any voltage adjustment. Fill out your system specs so we have some more details.
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
post #3 of 11
''was under the assumption that the default vcore for the E8400 was 1.875 volts''

wherever did u hear that....? its bull:turd:

3.4ghz @ 1.25v is sweet....ur good for 1.3v maybe a little more but they do have a tendency to fry ....lol

cpuz has never let me down its always bang on.... trust that

now crank 4ghz out of that puppy
Gaming
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9450 @ 3.6ghz Asus P5K PREMIUM Sapphire HD5970 + GTX260 physX 8GB BUFFALO FIRESTIX 8500 = 1150mhz 
Hard DriveOptical DriveOSMonitor
seagate 160gb ide 160gb seagate sata dvdrom sata x64 W.7600 RTM 20" 1680x1050 & 23'' 2048x1 
PowerCaseMouse
XCILIO 850W coolermaster CM590 logitech NX80 
  hide details  
Reply
Gaming
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9450 @ 3.6ghz Asus P5K PREMIUM Sapphire HD5970 + GTX260 physX 8GB BUFFALO FIRESTIX 8500 = 1150mhz 
Hard DriveOptical DriveOSMonitor
seagate 160gb ide 160gb seagate sata dvdrom sata x64 W.7600 RTM 20" 1680x1050 & 23'' 2048x1 
PowerCaseMouse
XCILIO 850W coolermaster CM590 logitech NX80 
  hide details  
Reply
post #4 of 11
Thread Starter 
sorry guys that was a typo i meant 1.185 not 1.85 lol
post #5 of 11
There are a multitude of default VIDs. It depends on the chip.

My E8400 defaults to 1.225, some are lower, some are higher.
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
post #6 of 11
Thread Starter 
oh ok cool i thought they were all the same,, My Stock vcore is normal then ,, if im at Stock 3ghz the default volts are 1.128 idle and 1.160 load, kinda low, But if im at 3.4ghz my default vcore goes all the way up to 1.25 at idle.. would my mobo be automatically upping the volts?

In order to get my chip prime stable ive gotta pump 1.3v into it at only 3.4ghz,,, booo
Edited by parsons256 - 5/28/08 at 11:31am
post #7 of 11
Quote:
Originally Posted by parsons256 View Post
oh ok cool i thought they were all the same,, My Stock vcore is normal then ,, if im at Stock 3ghz the default volts are 1.128 idle and 1.160 load, kinda low, But if im at 3.4ghz my default vcore goes all the way up to 1.25 at idle.. would my mobo be automatically upping the volts?

In order to get my chip prime stable ive gotta pump 1.3v into it at only 3.4ghz,,, booo

Set that CPU voltage to manual and ~1,20 if you have Loadline Calibration (Voltage Damper) disabled, if it´s enabled ~1,175 and you should do ~3,6 on that E8400.
The Blue Beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7-2600K cooled by Heatkiller Rev 3.0 LT ASUS P8Z68 Deluxe EVGA GTX 580 SC in SLI cooled by Koolance VID-N... 2x4GB G Skill RipjawsX 1600C8 
Hard DriveOptical DriveOSMonitor
Intel SSD 510 120GB / 250GB + WD Black Caviar 1TB Samsung DVD Win 7 64-bit Samsung 2443BW @ 1920x1200 
PowerCase
Corsair HX850 Lian Li PC-343B 
  hide details  
Reply
The Blue Beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7-2600K cooled by Heatkiller Rev 3.0 LT ASUS P8Z68 Deluxe EVGA GTX 580 SC in SLI cooled by Koolance VID-N... 2x4GB G Skill RipjawsX 1600C8 
Hard DriveOptical DriveOSMonitor
Intel SSD 510 120GB / 250GB + WD Black Caviar 1TB Samsung DVD Win 7 64-bit Samsung 2443BW @ 1920x1200 
PowerCase
Corsair HX850 Lian Li PC-343B 
  hide details  
Reply
post #8 of 11
Quote:
Originally Posted by Blameless View Post
There are a multitude of default VIDs. It depends on the chip.

My E8400 defaults to 1.225, some are lower, some are higher.
mine too whats your batch number??
Ivy Bridge
(15 items)
 
  
CPUMotherboardGraphicsRAM
3770k Gigabyte GA-Z77X-UD5H ASUS GTX670-DC2-2GD5 G.Skill 
Hard DriveCoolingOSMonitor
Samsung 830 128Gb Raystorm Win7 Ultimate 64bit Asus LED 24" 
KeyboardPowerCaseMouse
Steelseries G6V2 600w ModXstealth  CM 690 II advance Nvidia Steelseries IKARI Lazer 
Mouse PadAudio
Steelseries QcK Creative Sound Blaster X-Fi Titanium HD 
  hide details  
Reply
Ivy Bridge
(15 items)
 
  
CPUMotherboardGraphicsRAM
3770k Gigabyte GA-Z77X-UD5H ASUS GTX670-DC2-2GD5 G.Skill 
Hard DriveCoolingOSMonitor
Samsung 830 128Gb Raystorm Win7 Ultimate 64bit Asus LED 24" 
KeyboardPowerCaseMouse
Steelseries G6V2 600w ModXstealth  CM 690 II advance Nvidia Steelseries IKARI Lazer 
Mouse PadAudio
Steelseries QcK Creative Sound Blaster X-Fi Titanium HD 
  hide details  
Reply
post #9 of 11
Q810a198
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
post #10 of 11
Thread Starter 
i guess i got a crappy overclocking chip,, i have to put 1.35v into it just to get it stable at 3.6ghz booo
Thanks for the info tho
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › Help Overclocking E8400