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Overclock E8400

post #1 of 19
Thread Starter 
I am able to get it to 3.6 just using the "load optimized settings" in my bios but I never attempted to manually adjust my settings to overclock. Can anyone help me what to do? I am def a noob at this. I did some research and read most of the stickies here and on other sites it's just I don't want to follow someone elses settings if I have different hardware and might fry something.

This is what I am working with:

CPU - Itel E8400
Motherboard - Gigabyte GA-EP-43-DS3L
Memory - (2) Corsair XMS DDR2-6400 1gig and (2) Corsair XMS DDR2-6400 2gig
CPU cooling - Coolmaster Hyper TX3
Graphics - PNY Geforce 9600 GT 512mb
Operating system - Windows 7 64bit
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.0ghz Gigabyte GA-EP-DS3L PNY geforce 9600 GT 512mb 6gig total Cosair XMS2 DDR2-6400 
Hard DriveOptical DriveOSMonitor
WD 250gig, WD 1tb Toshiba blu-ray Windows 7 64 bit Dell 21" 
Power
500w 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.0ghz Gigabyte GA-EP-DS3L PNY geforce 9600 GT 512mb 6gig total Cosair XMS2 DDR2-6400 
Hard DriveOptical DriveOSMonitor
WD 250gig, WD 1tb Toshiba blu-ray Windows 7 64 bit Dell 21" 
Power
500w 
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post #2 of 19
You have a similar set up to my "primary system" build in my sig, any questions just ask! I have achieved 4.8 stable in the past but now dropped that due to not wanting to fry my VRMs.

Ask specific questions on this thread and use the rest of the forum for general knowledge about OCing.
 
Budget Build
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.8GHz - 1.38v - 24/7 Gigabyte Z68AP-D3 XFX R7970 Black Edition G.Skill Ripjaws 8GB 
Hard DriveOptical DriveCoolingOS
Seagate 1TB Samsung BluRay Noctua NH-D14 + 3 NF-F12 fans Windows 7 Professional 64bit 
PowerCase
OCZ Fatal1ty 750w Silverstone Raven RV-02-W 
CPUMotherboardGraphicsRAM
E8400 E0 Gigabyte G31M ES-2L HD 5670 4 GB generic value RAM 
Hard DriveCoolingOSPower
Samsung 500GB Scythe Yasya 1000 Windows 7 Professional 64bit Corsair CX430 
Case
Thermaltake 
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Budget Build
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.8GHz - 1.38v - 24/7 Gigabyte Z68AP-D3 XFX R7970 Black Edition G.Skill Ripjaws 8GB 
Hard DriveOptical DriveCoolingOS
Seagate 1TB Samsung BluRay Noctua NH-D14 + 3 NF-F12 fans Windows 7 Professional 64bit 
PowerCase
OCZ Fatal1ty 750w Silverstone Raven RV-02-W 
CPUMotherboardGraphicsRAM
E8400 E0 Gigabyte G31M ES-2L HD 5670 4 GB generic value RAM 
Hard DriveCoolingOSPower
Samsung 500GB Scythe Yasya 1000 Windows 7 Professional 64bit Corsair CX430 
Case
Thermaltake 
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post #3 of 19
Thread Starter 
What settings did you change in your bios to get to 4.2? I am not looking to go further than that. I used someones setting they put up and I wasn't able to load windows and it took a few crashes for me to get my bios screen up finally. I assume they had different hardware so when I followed their settings something went wrong.

Do you remember what you changed in your bios?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.0ghz Gigabyte GA-EP-DS3L PNY geforce 9600 GT 512mb 6gig total Cosair XMS2 DDR2-6400 
Hard DriveOptical DriveOSMonitor
WD 250gig, WD 1tb Toshiba blu-ray Windows 7 64 bit Dell 21" 
Power
500w 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.0ghz Gigabyte GA-EP-DS3L PNY geforce 9600 GT 512mb 6gig total Cosair XMS2 DDR2-6400 
Hard DriveOptical DriveOSMonitor
WD 250gig, WD 1tb Toshiba blu-ray Windows 7 64 bit Dell 21" 
Power
500w 
  hide details  
Reply
post #4 of 19
Is that a C0 stepping or E0 stepping Core 2 Duo E8400? CPU-Z will tell you. As a rule of thumb, a C0 stepping will need more voltage to reach a given clock speed. Stay under ~1.4V regardless. You likely shouldn't need to mess with VTT (FSB Termination) or CPU PPL much, if at all. It might not hurt to set VTT to 1.25V (default is 1.15V) just in case.

Your Northbridge (MCH) might need more voltage as it's dealing with 6GB and four modules of RAM than many other references you may find, as most reference setups usually had 2GB or 4GB and two modules of RAM.

As your RAM is 800MHz rated, you may need to raise the voltage, loosen the times, and/or both, to get it to run at the 900MHz you'd need for a 450MHz FSB. If that's the same RAM I have, it should do 900MHz (mine tops out ~960MHz). I can't recall exactly what voltage/timing I was running at that speed. It might have been the same ones I am now (only 5-5-5-18 instead of 5-5-5-12). Stay at or under ~2.1V for DDR2 RAM.
post #5 of 19
Thread Starter 
Quote:
Originally Posted by Princess Garnet View Post
Is that a C0 stepping or E0 stepping Core 2 Duo E8400? CPU-Z will tell you. As a rule of thumb, a C0 stepping will need more voltage to reach a given clock speed. Stay under ~1.4V regardless. You likely shouldn't need to mess with VTT (FSB Termination) or CPU PPL much, if at all. It might not hurt to set VTT to 1.25V (default is 1.15V) just in case.

Your Northbridge (MCH) might need more voltage as it's dealing with 6GB and four modules of RAM than many other references you may find, as most reference setups usually had 2GB or 4GB and two modules of RAM.

As your RAM is 800MHz rated, you may need to raise the voltage, loosen the times, and/or both, to get it to run at the 900MHz you'd need for a 450MHz FSB. If that's the same RAM I have, it should do 900MHz (mine tops out ~960MHz). I can't recall exactly what voltage/timing I was running at that speed. It might have been the same ones I am now (only 5-5-5-18 instead of 5-5-5-12). Stay at or under ~2.1V for DDR2 RAM.
I will have to check which e8400 I have when I get home. We have the same ram I forgot it was xms2 I made that list off the top of my head without being infront of my computer to double check.

If I understand this right you are saying to increase my core voltage around 1.3v, VVT to 1.25v, FSB 450mhz, Change ram timing to 5-5-5-18 and about 2.1v?

Sorry to sound so noobish lol
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.0ghz Gigabyte GA-EP-DS3L PNY geforce 9600 GT 512mb 6gig total Cosair XMS2 DDR2-6400 
Hard DriveOptical DriveOSMonitor
WD 250gig, WD 1tb Toshiba blu-ray Windows 7 64 bit Dell 21" 
Power
500w 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.0ghz Gigabyte GA-EP-DS3L PNY geforce 9600 GT 512mb 6gig total Cosair XMS2 DDR2-6400 
Hard DriveOptical DriveOSMonitor
WD 250gig, WD 1tb Toshiba blu-ray Windows 7 64 bit Dell 21" 
Power
500w 
  hide details  
Reply
post #6 of 19
RAM voltage might be ok at 2.0, only change one thing at a time and test with Prime95 for stability each time, 30 minutes should be a good indicator!

You can go over 1.4v on your VCore but it isn't advisable because the 45nm technology isn't very happy with large voltages and also your VRMs can get very hot on that Gigabyte board because they are not heatsinked.

Have a look at my CPU-Z and it will tell you some settings but I wouldn't go by the VID in CPU-Z as it can be off, always trust your BIOS!
 
Budget Build
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.8GHz - 1.38v - 24/7 Gigabyte Z68AP-D3 XFX R7970 Black Edition G.Skill Ripjaws 8GB 
Hard DriveOptical DriveCoolingOS
Seagate 1TB Samsung BluRay Noctua NH-D14 + 3 NF-F12 fans Windows 7 Professional 64bit 
PowerCase
OCZ Fatal1ty 750w Silverstone Raven RV-02-W 
CPUMotherboardGraphicsRAM
E8400 E0 Gigabyte G31M ES-2L HD 5670 4 GB generic value RAM 
Hard DriveCoolingOSPower
Samsung 500GB Scythe Yasya 1000 Windows 7 Professional 64bit Corsair CX430 
Case
Thermaltake 
  hide details  
Reply
 
Budget Build
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.8GHz - 1.38v - 24/7 Gigabyte Z68AP-D3 XFX R7970 Black Edition G.Skill Ripjaws 8GB 
Hard DriveOptical DriveCoolingOS
Seagate 1TB Samsung BluRay Noctua NH-D14 + 3 NF-F12 fans Windows 7 Professional 64bit 
PowerCase
OCZ Fatal1ty 750w Silverstone Raven RV-02-W 
CPUMotherboardGraphicsRAM
E8400 E0 Gigabyte G31M ES-2L HD 5670 4 GB generic value RAM 
Hard DriveCoolingOSPower
Samsung 500GB Scythe Yasya 1000 Windows 7 Professional 64bit Corsair CX430 
Case
Thermaltake 
  hide details  
Reply
post #7 of 19
Thread Starter 
I have been messing around with my settings trying to oc this and I am having a ton of problems.

The only setting that seems to work is if I change my FSB and MCH to 400 only giving me 3.6ghz. Any other settings the computer tries to boot and never gets up to the gigabyte screen then restarts itself and loads the default bios settings. When i go back into my bios it tells me there was a problem trying to boot due to overclocking and voltage changes. Any ideas what I should do?

Also at idle my core temps are around 47'C and 51'C under load. I just ordered all new upgraded fans but is this temp ok?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.0ghz Gigabyte GA-EP-DS3L PNY geforce 9600 GT 512mb 6gig total Cosair XMS2 DDR2-6400 
Hard DriveOptical DriveOSMonitor
WD 250gig, WD 1tb Toshiba blu-ray Windows 7 64 bit Dell 21" 
Power
500w 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.0ghz Gigabyte GA-EP-DS3L PNY geforce 9600 GT 512mb 6gig total Cosair XMS2 DDR2-6400 
Hard DriveOptical DriveOSMonitor
WD 250gig, WD 1tb Toshiba blu-ray Windows 7 64 bit Dell 21" 
Power
500w 
  hide details  
Reply
post #8 of 19
Post the settings you are trying to boot with.

That temperature under load is fine. I'm not sure why you only have a 4C discrepancy between idle and load though. 47C idle is a bit unusual for a 45nm Core 2 Duo at 3.6GHz under an aftermarket cooler.

Since the system shuts down when trying to boot, I am presuming it's not temperature related though.
post #9 of 19
Thread Starter 
As of now I just clicked "load fail safe settings" and running at 3.0. When I ran at 3.6 the only settings I changed was FSB and MCH to 400
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.0ghz Gigabyte GA-EP-DS3L PNY geforce 9600 GT 512mb 6gig total Cosair XMS2 DDR2-6400 
Hard DriveOptical DriveOSMonitor
WD 250gig, WD 1tb Toshiba blu-ray Windows 7 64 bit Dell 21" 
Power
500w 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.0ghz Gigabyte GA-EP-DS3L PNY geforce 9600 GT 512mb 6gig total Cosair XMS2 DDR2-6400 
Hard DriveOptical DriveOSMonitor
WD 250gig, WD 1tb Toshiba blu-ray Windows 7 64 bit Dell 21" 
Power
500w 
  hide details  
Reply
post #10 of 19
Just for your information, my processor when running @ 4.5GHz reaches 61C load and 39 idle. This is using a Scythe Yasya running at low speed.

As a rule of thumb for 45nm cores like the E8400, I would not exceed 65C for extended periods myself. They thermal throttle at 72C and running them this hot will reduce their expected life faster than standard. I would also not exceed 1.4v on the core 2 duo E0 stepping.

As the Princess Garnet very wisely said, post your current settings.

Here are mine for reference, these are off the top of my head so may not be exact.
467 x 9
1.39Vcore
+3 Memory (2.1v)
Timings are 5, 5, 5, 18

If you press CTRL+F1 at the BIOS mainscreen you will make extra options available in the menus.

DISABLE TURBO before you OC btw.
 
Budget Build
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.8GHz - 1.38v - 24/7 Gigabyte Z68AP-D3 XFX R7970 Black Edition G.Skill Ripjaws 8GB 
Hard DriveOptical DriveCoolingOS
Seagate 1TB Samsung BluRay Noctua NH-D14 + 3 NF-F12 fans Windows 7 Professional 64bit 
PowerCase
OCZ Fatal1ty 750w Silverstone Raven RV-02-W 
CPUMotherboardGraphicsRAM
E8400 E0 Gigabyte G31M ES-2L HD 5670 4 GB generic value RAM 
Hard DriveCoolingOSPower
Samsung 500GB Scythe Yasya 1000 Windows 7 Professional 64bit Corsair CX430 
Case
Thermaltake 
  hide details  
Reply
 
Budget Build
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.8GHz - 1.38v - 24/7 Gigabyte Z68AP-D3 XFX R7970 Black Edition G.Skill Ripjaws 8GB 
Hard DriveOptical DriveCoolingOS
Seagate 1TB Samsung BluRay Noctua NH-D14 + 3 NF-F12 fans Windows 7 Professional 64bit 
PowerCase
OCZ Fatal1ty 750w Silverstone Raven RV-02-W 
CPUMotherboardGraphicsRAM
E8400 E0 Gigabyte G31M ES-2L HD 5670 4 GB generic value RAM 
Hard DriveCoolingOSPower
Samsung 500GB Scythe Yasya 1000 Windows 7 Professional 64bit Corsair CX430 
Case
Thermaltake 
  hide details  
Reply
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