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PC Startup issues with E8400 overclocking

post #1 of 13
Thread Starter 
Hi all,

I recently got a new mainboard/RAM and mentioned E8400 CPU and started messing around with overclocking... where I encountered a problem I am not able to solve. Maybe the experts here can point me in the right direction!

I am trying to do the "easy" overclock to 3.6 GHz, which actually works, BUT:
the moment I exceed 3333 MHz, the computer needs 3 attempts to actually start up (power button is pressed, computer starts up just to shut down 2 seconds later. Another 2 seconds later, it starts again (by itself) just to power off again. The third start is the successful one.)


The current settings are (no startup problems):

CPU clock: 370
Multiplier: 9
RAM frequency: 740 (1:1)
CPU Voltage: 1.225
Mainboard V: 1.425
Memory V: 1.90
RAM Timings: 5-5-5-15 (default)


The moment I change the clock to 371, the PC fails to restart (shuts down for a few seconds before booting up again) and the above mentioned problem kicks in should I turn off the machine entirely.

What I tried:

CPU Voltage up to 1.3
Memory Voltage up to 2.1
Mainboard voltage up to 1.45
Disconnecting devices to narrow it down

... without success. The moment I go up to 371 (or 400 for that matter), the computer fails to start flawlessly. Other than that, it works just fine, but I really don't want that erratic on/off to damage the system's components.

Maybe you have an idea how to fix that!

-------

System specs:

MSI P35 Platinum
Core2 Duo E8400
4GB DDR2-800 RAM (Kingston value)
GeForce 7900GTO
Creative X-Fi sound blaster
2x250GB SATAII HD RAID-0
1x250GB SATA HD
2 optical drives
500W power supply

-------

Thanks in advance!
post #2 of 13
See if you can get it stable at 375. Your board may have what's called an FSB "hole". I.E. your board could be stable @ 370 unstable @ 371 and 372 but stable again @ 373 and above.
Black Ice
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Black Ice
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post #3 of 13
The same thing happens on a computer i know with the e8400. However he has not overclocked it at all. He has an abit p35 motherboard with e8400 cpu, 2gb 800mhz corsair ram, 8800GT graphics card and 600w power supply i think is the main thing.
But he gets the whole multiple resets, he often has to boot into safemode than reset in normal mode for it to work
Gaming Machine
(13 items)
 
  
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E8400 Gigabyte GA-P35-DS3L Asus EN8600GT-HTDP-512 GF8600GT 2 x Corsair DDR2 2GB PC-5300/677 
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Seagate Barracuda 160Gb + 320Gb Writemaster DVD RW Vista 64bit Home Premium Samsung 19" LCD 
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Gaming Machine
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E8400 Gigabyte GA-P35-DS3L Asus EN8600GT-HTDP-512 GF8600GT 2 x Corsair DDR2 2GB PC-5300/677 
Hard DriveOptical DriveOSMonitor
Seagate Barracuda 160Gb + 320Gb Writemaster DVD RW Vista 64bit Home Premium Samsung 19" LCD 
KeyboardPowerCaseMouse
Logitech G15 (Red one) Zalman 500W Thermaltake Logitech G5 
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post #4 of 13
Quote:
Originally Posted by cassieb View Post
The same thing happens on a computer i know with the e8400. However he has not overclocked it at all. He has an abit p35 motherboard with e8400 cpu, 2gb 800mhz corsair ram, 8800GT graphics card and 600w power supply i think is the main thing.
But he gets the whole multiple resets, he often has to boot into safemode than reset in normal mode for it to work
In your case one or more sticks of ram could be bad or not setup properly. Go HERE and download memtest86 iso. Once downloaded burn the image to a CD and boot the computer with it. Let the program run for a few hours and see if any errors show up.
Black Ice
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 2500K Gigabyte GA-Z68XP-UD3 EVGA GTX 560 Ti Superclocked (01G-P3-1563-AR) G-SKILL Ripjaws X Series F3-12800CL7-4GBXH (x2) 
Hard DriveHard DriveOptical DriveCooling
Crucial M4 SATA 6GB/s SSD (CT128M4SSD2) OCZ Vertex 3 6GB/s SSD (VTX3-25SAT3-120G) Samsung Blu-Ray Combo Internal 12XReadable and ... Cooler Master Hyper 212 Plus (RR-B10-212P-G1) 
OSMonitorKeyboardPower
Windows 7 Professional x64 Samsung SyncMaster 2494HM (24" @1920x1080) Deck Legend Frost (105 key tactile) Corsair HX850 (CMPSU-850HX) 
CaseMouseMouse PadMouse Pad
Corsair Carbide Series 500R (CC-9011012-WW) Logitech G500 Gaming Mouse Steelseries 4HD Steelseries 63005SS QcK mini Mouse Pad 
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ASUS Xonar D2 (PCI) 
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Black Ice
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 2500K Gigabyte GA-Z68XP-UD3 EVGA GTX 560 Ti Superclocked (01G-P3-1563-AR) G-SKILL Ripjaws X Series F3-12800CL7-4GBXH (x2) 
Hard DriveHard DriveOptical DriveCooling
Crucial M4 SATA 6GB/s SSD (CT128M4SSD2) OCZ Vertex 3 6GB/s SSD (VTX3-25SAT3-120G) Samsung Blu-Ray Combo Internal 12XReadable and ... Cooler Master Hyper 212 Plus (RR-B10-212P-G1) 
OSMonitorKeyboardPower
Windows 7 Professional x64 Samsung SyncMaster 2494HM (24" @1920x1080) Deck Legend Frost (105 key tactile) Corsair HX850 (CMPSU-850HX) 
CaseMouseMouse PadMouse Pad
Corsair Carbide Series 500R (CC-9011012-WW) Logitech G500 Gaming Mouse Steelseries 4HD Steelseries 63005SS QcK mini Mouse Pad 
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ASUS Xonar D2 (PCI) 
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post #5 of 13
Thread Starter 
Quote:
Originally Posted by Iceman0803 View Post
See if you can get it stable at 375. Your board may have what's called an FSB "hole". I.E. your board could be stable @ 370 unstable @ 371 and 372 but stable again @ 373 and above.
Thanks for the info!
Unfortunately, it appears to be unstable at 375, 380, and up.
It even failed to first-time start at 370 today, but only once (which did not happen yesterday).

Ad RAM: I was mistaken there, it's actually Corsair XMS2 DDR2-800 memory.

Is it wise to ignore the problem?
post #6 of 13
Quote:
Originally Posted by thefang View Post
Thanks for the info!
Unfortunately, it appears to be unstable at 375, 380, and up.
It even failed to first-time start at 370 today, but only once (which did not happen yesterday).

Ad RAM: I was mistaken there, it's actually Corsair XMS2 DDR2-800 memory.

Is it wise to ignore the problem?
Set your CPU multi to 5 or 6 and change your fsb to 371 and see if it will boot. If it does boot into windows try to run a stability test. I suggest Orthos blend test @ priority 9 for about 15 mins.
Black Ice
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 2500K Gigabyte GA-Z68XP-UD3 EVGA GTX 560 Ti Superclocked (01G-P3-1563-AR) G-SKILL Ripjaws X Series F3-12800CL7-4GBXH (x2) 
Hard DriveHard DriveOptical DriveCooling
Crucial M4 SATA 6GB/s SSD (CT128M4SSD2) OCZ Vertex 3 6GB/s SSD (VTX3-25SAT3-120G) Samsung Blu-Ray Combo Internal 12XReadable and ... Cooler Master Hyper 212 Plus (RR-B10-212P-G1) 
OSMonitorKeyboardPower
Windows 7 Professional x64 Samsung SyncMaster 2494HM (24" @1920x1080) Deck Legend Frost (105 key tactile) Corsair HX850 (CMPSU-850HX) 
CaseMouseMouse PadMouse Pad
Corsair Carbide Series 500R (CC-9011012-WW) Logitech G500 Gaming Mouse Steelseries 4HD Steelseries 63005SS QcK mini Mouse Pad 
Audio
ASUS Xonar D2 (PCI) 
  hide details  
Reply
Black Ice
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 2500K Gigabyte GA-Z68XP-UD3 EVGA GTX 560 Ti Superclocked (01G-P3-1563-AR) G-SKILL Ripjaws X Series F3-12800CL7-4GBXH (x2) 
Hard DriveHard DriveOptical DriveCooling
Crucial M4 SATA 6GB/s SSD (CT128M4SSD2) OCZ Vertex 3 6GB/s SSD (VTX3-25SAT3-120G) Samsung Blu-Ray Combo Internal 12XReadable and ... Cooler Master Hyper 212 Plus (RR-B10-212P-G1) 
OSMonitorKeyboardPower
Windows 7 Professional x64 Samsung SyncMaster 2494HM (24" @1920x1080) Deck Legend Frost (105 key tactile) Corsair HX850 (CMPSU-850HX) 
CaseMouseMouse PadMouse Pad
Corsair Carbide Series 500R (CC-9011012-WW) Logitech G500 Gaming Mouse Steelseries 4HD Steelseries 63005SS QcK mini Mouse Pad 
Audio
ASUS Xonar D2 (PCI) 
  hide details  
Reply
post #7 of 13
Thread Starter 
It does start up, but after the usual 2-3 failed attempts. Prime95 runs fine for an hour till I cancelled; have to try the one you have suggested still.
post #8 of 13
Just caught your thread, here are some ideas that may or may not point you in the right direction:

1. Make sure your RAM is running at the spec minimum voltage. Edit: I just checked, you are good there.
2. This shouldn't be the problem, but if your Mainboard V is actually the Northbridge voltage, that seems kinda high for such a low FSB. What is the default voltage? Mine defaults at 1.25 volts (my DFI board defaults to 1.33 volts)
3. You might need to up the CPU voltage a notch or 2, 1.225 is only .225 more than stock.

I'll chime back in with more ideas when I think of them
    
CPUMotherboardGraphicsRAM
E8400 DFI DK P35 8800GT 512 OCZ, Team 6GB Total 
Hard DriveOptical DriveOSMonitor
Dual WD160, RAID 0 Samsung IDE DVD Burner Vista Ultimate 64 Envision 22", Hanns G 19" 
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CPUMotherboardGraphicsRAM
E8400 DFI DK P35 8800GT 512 OCZ, Team 6GB Total 
Hard DriveOptical DriveOSMonitor
Dual WD160, RAID 0 Samsung IDE DVD Burner Vista Ultimate 64 Envision 22", Hanns G 19" 
PowerCase
OCZ Gamextreme 700 Antec 900 
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post #9 of 13
Thread Starter 
Hi,

the board defaults to 1.25V, I lowered it to 1.375 now.
I will now try with 1.275 CPU voltage, which funnily defaults to 1.15V.

Another thing: even at 3333MHz, it needs a second attempt to start up, but at least manages to restart normally (without the power down and 3-second-pause). Also, anything above that value adds another on/off cycle during startup.
post #10 of 13
are those voltages based on the bios or on software? I know my memory (pc8500) had memtest errors when I set it to 2.2v (rated) in the bios, came to find out the vdroop or whatever put it at 2.06v. So I gave it another .1v and it passed memtest with no errors. Sound like the power cycling is the mainboard failing to boot at those settings, just a guess though.
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