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Please Help Me Overclock Intel E8400

post #1 of 6
Thread Starter 
Hello I am a broke College Student Who used to have stable job/etc. Unfortunately I can not spend as much money as i used to on computer hardware. Anyways I am looking forward to overclocking my current CPU in order to bring some new life into my system and upgrade in a way without spending any money.

I have a great CPU cooler and fan installed and have the system running in air with vantec tornado's x4 (80mm) and I also use Artic Cooling 7 Cooler I purchased ages ago but never put it to good use.

I have tried to overclock with simple things like raising the bus speed but every time i send it over 3.0 my bios tells me its unstable.

here its my cpu-z info:



Uploaded with ImageShack.us

any information is appreciated. I was thinking of getting another 4gb ddr2 dominators ( i can get them for free from a friend for some beer trade) which will bring me to 8gb of ram and hopefully 3.4 E8400 which sounds like a nice upgrade.

Sorry for crappy screen shot also.
Edited by KingAlkaiser - 7/19/11 at 8:05pm
post #2 of 6
Thread Starter 
I noticed this guide online that says:

"adjusting the CPU FSB to 400MHz in order to reach 3600MHz. For stability reasons we recommend you manually set the 'PCI Express bus' frequency to 100MHz when overclocking. Depending on the memory you are using, we also suggest setting the memory multiplier to 2x, which on a 400MHz FSB will result in a memory speed of 800MHz. Given that most use DDR2-800 memory, this will ensure that the system remains stable."

3.6 sounds like it can be achieved with my system so all i have to set it to (400x9)=3600 or 3.6 but after this do i really need to change memory settings and default voltage?

have you guys heard of gigabyte easytune? is this software worth the download?
post #3 of 6
Hello there. You have an excellent system for overclocking and it shouldn't be that hard for you to hit at least 4.0GHz if you have a little patience. Give these settings a try first and then decide if you would like to try for a higher OC. Make sure to disable Enhanced Halt State C1E and EIST, I can't remember which BIOS menu they are under, just look around a bit (you can enable it later if you like). This is for 3.6GHz.
Code:
CPU = Model E8400
Motherboard = EP45-UD3P 
BIOS Version = 
Ram = 

MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio .............................: 9
Fine CPU Clock Ratio.....................:
CPU Frequency ..............................: 3600MHz


Clock Chip Control
Standard Clock Control
CPU Host Clock Control..................: [Enabled]
CPU Host Frequency (Mhz) ............: 400MHz
PCI Express Frequency (Mhz) .........: 100MHz

C.I.A.2 .................................:[Disabled]


Advanced Clock Control [Press Enter]
CPU Clock Drive...........................: <<< 800
PCI Express Clock Drive.................: <<< 900
CPU Clock Skew (ps)....................: <<<
MCH Clock Skew (ps)...................: <<<


DRAM Performance Control
Performance Enhance...................: [STANDARD]
Extreme Memory Profile (X.M.P.).....: Disabled
(G)MCH Frequency Latch...............: [Auto]
System Memory Multiplier ..............: 2.66D if it is 1066; 2.00D if it's DDR2 800
Memory Frequency (Mhz) ..............: 1068MHz (2.66D) 800MHz (2.00D)
DRAM Timing Selectable ................: [Manual]

Standard Timing Control
CAS Latency Time........................:5
tRCD .............................................:5
tRP............................................... ..:5
tRAS.............................................. :15


Advanced Timing Control
tRRD...........................................: auto
tWTR..........................................: auto
tWR............................................: auto
tRFC...........................................: auto
tRTP...........................................: auto
Command Rate (CMD) ....................: auto


Channel A
Static tRead Value.........................: 9 or 10, try 9 and if it doesn't boot go to 10
Channel B
Static tRead Value.........................: same as channel A


Motherboard Voltage Control
CPU
Load line Calibration: Enabled
CPU Vcore&#8230;.&#8230;&#8230;&#8230;................................: 1.3125 
CPU Termination&#8230;..... 1.200V*...............: 1.3
CPU PLL&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;....1.500V*.......: 1.5
CPU Referen.&#8230;&#8230;&#8230;&#8230;....0.755V*...........: .76 at 1.2 CPU Term, set it to .76 and set CPU Term to 1.2.  Then use the +key until your CPU term hits 1.3, this value should go up at the same time and this is what you want


MCH/IC
MCH Core&#8230;&#8230;&#8230;&#8230;&#8230;.....1.100V...........: 1.3
MCH Reference&#8230;.&#8230;&#8230;.0.800V............: ..72 at CPU Term 1.2, again set this to .72 and when you set the CPU term to 1.2 and use the + key it will increase in the same way as the CPU reference.
MCH/DRAM Ref.&#8230;......0.900V..............: 1/2 of DRAM voltage
ICH I/O&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.....1.500V............: 1.5
ICH Core&#8230;&#8230;&#8230;&#8230;...&#8230;&#8230;1.100V...........: 1.1

DRAM
DRAM Voltage &#8230;&#8230;....1.800V............: set this to the stock voltage of your RAM
DRAM Termination .&#8230;0.900V............: 1/2 of DRAM voltage
Channel A Reference 0.900V............: 1/2 of DRAM voltage
Channel B Reference 0.900V............: 1/2 of DRAM voltage

When you get it to boot make sure to test for stability with the program of your choice, just do it for a good amount of time. If it doesn't work try either +/- one step on the MCH reference or CPU reference, one at a time, until it boots and is stable. If this fails, raise the VCORE a notch or two.

I wouldn't buy any more DDR2 at this point, you should just wait a bit and buy new RAM when you upgrade. EDIT: but if you can get them for free, go for it. You may need to increase the MCH core when you put them in though.

I only use EASYTune for getting a few more MHz out of an already considerable OC. This board was made to overclock so you should really learn to do it manually.

EDIT: I edited a couple of values because I had them wrong, it should be good now. EDIT again: Wow i got a lot of numbers wrong, it has been a long day, sorry. Everything is right now.
Edited by SyveRson - 7/19/11 at 8:56pm
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post #4 of 6
Thread Starter 
Thank you very much for the help i appreciate it a lot. And yeah i bought the system to overclock but never got around it because quite frankly when i bought it 2-3 years ago i could already max everything with no problems so i didn't bother.

Now That I am super broke and wish to upgrade cpu, but to upgrade cpu id need new system almost since i am using oldish tech or socket 775 still.

by the way what is this section for:
"CPU Clock Drive...........................: <<< 800
PCI Express Clock Drive.................: <<< 900"

anyways ill test it out tomorrow after work, what do you guys use to benchmark anyways? the reason i didn't go for 4.0 or higher than 3.4 was because of lack of knowledge/ didn't want to bother a lot or play around with voltages and do hassle free easy upgrade which i though was only setting to 400x9 multiplier since my friends swear they didn't do anything but this with stock cooler.

appreciate the info tyvm
post #5 of 6
Thread Starter 
hello first of all here is my current bios setting. Its mostly default stuff but i removed a lot of the build in things to change the cpu settings.

http://imageshack.us/photo/my-images/829/img1094e.jpg/
http://imageshack.us/photo/my-images/62/img1095ez.jpg/
http://imageshack.us/photo/my-images/801/img1096t.jpg/

My motherboard its:
http://www.newegg.com/Product/Produc...82E16813128358

my ram its :
http://www.newegg.com/Product/Produc...82E16820145197
DDR2 1066 (PC2 8500)

i have tried your settings but my system would not boot. Maybe i made a mistake in settings in bios but ill re-check it again.

what about 3.4 settings will this be a bit more of a easy goal? with minimal hasle of voltage increase?

any information is greatly appreciated.
post #6 of 6
It seems like the numbers I provided should work, I don't know why they wouldn't.

Try leaving the CPU Reference and MCH References on Auto. If that doesn't work, try changing the CPU reference to .72 and the MCH reference to .76, which would be the opposite of how I stated to set them above.

Since you have 1066 RAM you can use the 2.66D latch for either 400FSB (3.6GHz) or 378FSB (3.4GHz).

As for the rest of the numbers, make sure that you get them set correctly. The numbers are probably a little higher (but not dangerous at all) than what you would need to run a mild overclock like you are looking for, so they should work for either 400x9 as I stated above, or 378x9 for 3.4GHz.

Since the VID of your CPU is 1.25 I am pretty sure that the Vcore is not the problem. If you need a good resource, try the UD3P thread here > http://www.overclock.net/intel-motherboards/415077-gigabyte-ep45-ud3-series-owners-guide-2018.html . Post there and someone more knowledgeable than me could help you out.
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My Computer
(12 items)
 
Haswell PC
(12 items)
 
HTPC
(12 items)
 
CPUMotherboardGraphicsRAM
i7 3770K @ 4.7GHz GA-Z77X-UD3H Sapphire R9 290 4x4 GB Mushkin Stealth 2133MHz 
Hard DriveHard DriveHard DriveCooling
Samsung EVO 120GB Crucial M500 480GB WD10EZEX 1TB H100i 
OSMonitorPowerCase
Win 10 QNIX QX2710 Rosewill HIVE-650 HAF 912 
CPUMotherboardGraphicsRAM
i5 4590 GA-Z97X-SLI ASUS STRIX RX 480 8GB 2x4GB Samsung 30nm 2000Mhz 
Hard DriveHard DriveHard DriveCooling
Crucial M4 128GB SSD WD Blue 500GB WD Blue 320GB Stock Intel 
OSMonitorPowerCase
Win 10 QNIX QX2710 Corsair TX650 DeepCool Tesseract 
CPUMotherboardGraphicsRAM
i5 3570K 4.4Ghz GA-Z77X-UD5H Sapphire HD7950 3GB 2x4 GB Mushkin Stealth 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
A-Data S599 64GB SSD Assorted HDDs ASUS 24X DVD Burner Hyper 212 EVO 
OSMonitorPowerCase
Win 10 x64 SANYO 50" Silverstone ST50F-ESG NZXT Source 210 Black 
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