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E8400 Stuck @ 3.789GHz

post #1 of 52
Thread Starter 
Hi, this is my first post here and let me start off by saying that I have learned a lot about overclocking from this site over the last couple years and it has proven to be extremely useful to me in overclocking my current build. I have read numerous other forums posts about overclocking this CPU/MOBO combination, but I was hoping I could get some direct assistance.

Now to my problem.

I have been fighting with my e8400 for two years now trying to find the right balance of speed/stability...I want to squeeze every bit of speed I can out of it as every little bit is noticeable at these speeds.

Here's what I am working with right now:

FSB: 421x9
Memory: 842MHz (4-4-4-12)

VCore: 1.3875 (1.368 in CPU-Z)
GTL Reference: .63x
PLL Voltage: 1.6
FSB Termination Voltage: 1.28
DRAM: 2.1
NB Voltage: 1.28
SB Voltage: Auto
PCIE Sata Voltage: 1.5

Raising the vcore beyond this point doesn't seem to directly add stability when overclocking past 3.8GHz. Beyond that my games will crash and BSOD. I am 100% stable @ 3.789GHz but I was hoping someone could help me to get at least 3.9GHz stable on air cooling. Thanks in advance.
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E8400 E0 P5Q Pro P45 MSi N460 GTX HAWK (1GB) G.Skill DDR2 PC8500 (4GB) 
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Seagate 7200 RPM Sata-II (250 GB) LG Multidrive Windows 7 Ultimate 64-bit Edition Acer 19" Widescreen LCD 
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E8400 E0 P5Q Pro P45 MSi N460 GTX HAWK (1GB) G.Skill DDR2 PC8500 (4GB) 
Hard DriveOptical DriveOSMonitor
Seagate 7200 RPM Sata-II (250 GB) LG Multidrive Windows 7 Ultimate 64-bit Edition Acer 19" Widescreen LCD 
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Antec High Current Gamer - 620w Coolermaster ATX Full Tower Logitech G9x X TRAC RIPPER 
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post #2 of 52
I know this doesn't sound related, but which power supply do you have? What's the brand and model?
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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #3 of 52
I fought my old E8400 C0 like you did. Try increasing the timings on the ram to 5-5-5-15 or something and see if that helps. I pushed the voltage to 1.41 on that chip and it stilled crapped on me so it was a dud. I got a new E8400 E0 in another rig and it's quite a good chip. Hits 4.1ghz with 1.33 volts.
:]
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:]
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post #4 of 52
Thread Starter 
My powersupply is an OCZ. OCZGXS600. 600watts.
Edited by Dregos - 4/7/11 at 12:07am
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(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 E0 P5Q Pro P45 MSi N460 GTX HAWK (1GB) G.Skill DDR2 PC8500 (4GB) 
Hard DriveOptical DriveOSMonitor
Seagate 7200 RPM Sata-II (250 GB) LG Multidrive Windows 7 Ultimate 64-bit Edition Acer 19" Widescreen LCD 
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Antec High Current Gamer - 620w Coolermaster ATX Full Tower Logitech G9x X TRAC RIPPER 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 E0 P5Q Pro P45 MSi N460 GTX HAWK (1GB) G.Skill DDR2 PC8500 (4GB) 
Hard DriveOptical DriveOSMonitor
Seagate 7200 RPM Sata-II (250 GB) LG Multidrive Windows 7 Ultimate 64-bit Edition Acer 19" Widescreen LCD 
PowerCaseMouseMouse Pad
Antec High Current Gamer - 620w Coolermaster ATX Full Tower Logitech G9x X TRAC RIPPER 
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post #5 of 52
Thread Starter 
Quote:
Originally Posted by Launcherstrike View Post
I fought my old E8400 C0 like you did. Try increasing the timings on the ram to 5-5-5-15 or something and see if that helps. I pushed the voltage to 1.41 on that chip and it stilled crapped on me so it was a dud. I got a new E8400 E0 in another rig and it's quite a good chip. Hits 4.1ghz with 1.33 volts.
Yeah I see so many other people online who say their E0 does the same as yours. I want to be one of those people! xD I will try your suggestion.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 E0 P5Q Pro P45 MSi N460 GTX HAWK (1GB) G.Skill DDR2 PC8500 (4GB) 
Hard DriveOptical DriveOSMonitor
Seagate 7200 RPM Sata-II (250 GB) LG Multidrive Windows 7 Ultimate 64-bit Edition Acer 19" Widescreen LCD 
PowerCaseMouseMouse Pad
Antec High Current Gamer - 620w Coolermaster ATX Full Tower Logitech G9x X TRAC RIPPER 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 E0 P5Q Pro P45 MSi N460 GTX HAWK (1GB) G.Skill DDR2 PC8500 (4GB) 
Hard DriveOptical DriveOSMonitor
Seagate 7200 RPM Sata-II (250 GB) LG Multidrive Windows 7 Ultimate 64-bit Edition Acer 19" Widescreen LCD 
PowerCaseMouseMouse Pad
Antec High Current Gamer - 620w Coolermaster ATX Full Tower Logitech G9x X TRAC RIPPER 
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post #6 of 52
Quote:
Originally Posted by Dregos View Post
My powersupply is an OCZ. OCZGXS600. 600watts.
Hmm, it's not a great unit, but I am relieved to see that it's not a generic unit. I was concerned that the PSU was limiting the OC due to being absolutely unable to handle the stress.

So that theory might have been debunked.
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
post #7 of 52
At 421 FSB there should be an option to select 1010mhz memory instead of the 842mhz you have set now. Then change timings to 5-5-5-15 to make it stable. Sometimes boards don't overclock that well when using a 1:1 ratio.
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Hard DriveOptical DriveCoolingOS
Samsung 830 128GB SSD, Seagate 3TB, Samsung 1TB Sony DVD/Rw 24x Thermalright Ultra 120 Extreme + GT AP-14 Windows 10 Pro 64-bit 
MonitorKeyboardPowerCase
Samsung U24E590D UHD Saitek Eclipse II Seasonic Prime 850w Titanium Corsair Carbide Air 540 
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post #8 of 52
Thread Starter 
I lowered my ram timings to 5-5-5-15 and put the VCore @ 1.41 (1.40 in CPU-Z). I also put the FSB Termination Voltage up 1 notch to put it @ 1.3.

So far it seems stable @ 3.915 (435 FSB) so I think I am on the right track. How high should I adjust the FSB Termination Voltage before I risk damaging the CPU? My CPU reached about 65° while running prime95 @ 1.4vcore
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 E0 P5Q Pro P45 MSi N460 GTX HAWK (1GB) G.Skill DDR2 PC8500 (4GB) 
Hard DriveOptical DriveOSMonitor
Seagate 7200 RPM Sata-II (250 GB) LG Multidrive Windows 7 Ultimate 64-bit Edition Acer 19" Widescreen LCD 
PowerCaseMouseMouse Pad
Antec High Current Gamer - 620w Coolermaster ATX Full Tower Logitech G9x X TRAC RIPPER 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 E0 P5Q Pro P45 MSi N460 GTX HAWK (1GB) G.Skill DDR2 PC8500 (4GB) 
Hard DriveOptical DriveOSMonitor
Seagate 7200 RPM Sata-II (250 GB) LG Multidrive Windows 7 Ultimate 64-bit Edition Acer 19" Widescreen LCD 
PowerCaseMouseMouse Pad
Antec High Current Gamer - 620w Coolermaster ATX Full Tower Logitech G9x X TRAC RIPPER 
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post #9 of 52
Quote:
Originally Posted by Dregos View Post
I lowered my ram timings to 5-5-5-15 and put the VCore @ 1.41 (1.40 in CPU-Z). I also put the FSB Termination Voltage up 1 notch to put it @ 1.3.

So far it seems stable @ 3.915 (435 FSB) so I think I am on the right track. How high should I adjust the FSB Termination Voltage before I risk damaging the CPU? My CPU reached about 65° while running prime95 @ 1.4vcore
The voltage settings for NB and FSB you have now are fine for up to 500 FSB or more. At around 450 FSB I'd use 1.26 for the NB and 1.24 for the FSB termination, maybe 0.02v more for each.
Money dump
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CPUMotherboardGraphicsRAM
Intel i5 3570k 4.4Ghz @ 1.22v ASRock Z77 Pro4 Sapphire R9 Nano @ Fury X clocks Crucial Ballistix VLP 2x8GB 1600 @ 2133 
Hard DriveOptical DriveCoolingOS
Samsung 830 128GB SSD, Seagate 3TB, Samsung 1TB Sony DVD/Rw 24x Thermalright Ultra 120 Extreme + GT AP-14 Windows 10 Pro 64-bit 
MonitorKeyboardPowerCase
Samsung U24E590D UHD Saitek Eclipse II Seasonic Prime 850w Titanium Corsair Carbide Air 540 
MouseAudio
Steelseries Xai Asus Xonar D1 / M-Audio AV40 / Ultrasone HFI-650 
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Money dump
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CPUMotherboardGraphicsRAM
Intel i5 3570k 4.4Ghz @ 1.22v ASRock Z77 Pro4 Sapphire R9 Nano @ Fury X clocks Crucial Ballistix VLP 2x8GB 1600 @ 2133 
Hard DriveOptical DriveCoolingOS
Samsung 830 128GB SSD, Seagate 3TB, Samsung 1TB Sony DVD/Rw 24x Thermalright Ultra 120 Extreme + GT AP-14 Windows 10 Pro 64-bit 
MonitorKeyboardPowerCase
Samsung U24E590D UHD Saitek Eclipse II Seasonic Prime 850w Titanium Corsair Carbide Air 540 
MouseAudio
Steelseries Xai Asus Xonar D1 / M-Audio AV40 / Ultrasone HFI-650 
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post #10 of 52
Thread Starter 
Quote:
Originally Posted by Acoma_Andy View Post
At 421 FSB there should be an option to select 1010mhz memory instead of the 842mhz you have set now. Then change timings to 5-5-5-15 to make it stable. Sometimes boards don't overclock that well when using a 1:1 ratio.
I took your advice and changed to the 5:6 ratio 1044MHz, however my Windows Aero stopped responding properly (my window colors changed to windows default) which is one of the common signs of instability for me)
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 E0 P5Q Pro P45 MSi N460 GTX HAWK (1GB) G.Skill DDR2 PC8500 (4GB) 
Hard DriveOptical DriveOSMonitor
Seagate 7200 RPM Sata-II (250 GB) LG Multidrive Windows 7 Ultimate 64-bit Edition Acer 19" Widescreen LCD 
PowerCaseMouseMouse Pad
Antec High Current Gamer - 620w Coolermaster ATX Full Tower Logitech G9x X TRAC RIPPER 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 E0 P5Q Pro P45 MSi N460 GTX HAWK (1GB) G.Skill DDR2 PC8500 (4GB) 
Hard DriveOptical DriveOSMonitor
Seagate 7200 RPM Sata-II (250 GB) LG Multidrive Windows 7 Ultimate 64-bit Edition Acer 19" Widescreen LCD 
PowerCaseMouseMouse Pad
Antec High Current Gamer - 620w Coolermaster ATX Full Tower Logitech G9x X TRAC RIPPER 
  hide details  
Reply
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