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Cant overclock my E8400?

J

jfuze

Limp Gawd
Joined
Feb 21, 2008
Messages
182
Like i've said in other threads, i've been running my current PC now for a year without any issues at all. Just added another 4Gb of memory and thought i'd finally overclock my E8400 to get some more speed out of it.(Ive got a good aftermarket cooler on it already)

Kinda confused though.... it's supposed to be really easy for it to be OC'd to 3.6Ghz but i cant get it to work. (Followed the settings from this guide at legion hardware)

everytime i set those settings above and reboot i get a quick blue screen flash then windows errors. :(

what could i be doing wrong? lol
 
So your doing 9x400 for 3600mhz. Did you add any cpu voltage? Also might need to take your NB voltage up.
 
No, I didnt increase the voltage. Can someone explain in simple terms what that does?
 
jfuze said:
No, I didnt increase the voltage. Can someone explain in simple terms what that does?
Click to expand...

You want the lowest stable voltage you can get for your OC. This will keep temps down compared to just throwing the max voltage the chip can handle. Do it in small parts. Also. When you took your FSB to 800 you want to make sure your ram dvider is set right. Make sure the ram is still running at 800mhz (unless you have 1066 memory). If you dont get this right you won't make it into windows. When you know this is right you need to increase your cpu voltage in small steps. For that chip I would just put it at 1.30V and see if its stable. You will want to run something like OCCT or Prime95 to test stability. Make sure you can pass ~8 hours of Prime or OCCT before calling it stable. These wont garuntee it will be a stable system but should get you very close. I did an E8400 a while back and got 3.8ghz @ 1.35V. Good luck. Check your bios and see if hte memory speed is showing 800mhz. You should be able to see this on the POST screen also.
 
You need to check your voltages, overclocking a CPU that much is kinda like making more power in an engine, you need to give the CPU (engine) more voltage (fuel) to get to the 3.6GHz mark and have it run stable. Spend some time looking up guides and more in-depth overclocking guides, make sure you read everything and ask questions if you have them.

You also need to learn about the RAM divider, how to manually set timings and voltage for your RAM, and how to actually calculate an overclock.
 
thanks guys

Well I increased the voltage a bit and Windows booted up just fine... but it showed no overclock on CPU-z. Hm. lol (I saved it in my bios... doubled checked by rebooting and the settings were still there)

Should i reset my motherboard and try again?
 
I'm having problems getting my e8400 to 4.0 GHz. I was able to get it to 3.6 by adjusting just the Vcore.

Can't seem to get 4.0 GHz @ FSB set to 445 MHz (445 x 9). I set the Vcore as high as I was comfortable with at 1.39375 (1.368 in CPUZ). Orthos gave an error after 1 minute. What should I change next?

Got an ASUS P5E using Rampage Formula BIOS version 0701. Here is my experiment data so far for 4 GHz. I'm using Crucial Dominator RAM DDR2 1066 5-5-5-15 at 2.1v

Overclocking Cycle 4
Comments: New DDR2-1066 RAM, RAM clocked at 1069 MHz Asus Rampage Formula 0701

CPU PLL Voltage Auto
North Bridge Voltage Auto
DRAM Voltage = 2.1V
VTT FSB Termination = Auto
South Bridge Voltage = Auto
SB 1.5V Voltage Auto
Loadline Calibration Auto
CPU GTL Voltage Reference Auto
NB GTL Voltage Reference Auto
DRAM Controller Voltage REF Auto
DRAM Channel A Voltage REF Auto
DRAM Channel B Voltage REF Auto
FSB = 445 MHz
PCIE Frequency = 100 MHz

Using Orthos Small FFTs stress test:
VCore Voltage = (CPUZ)1.328/1.336/1.344/1.352 (BIOS)1.38125V
6 seconds, error on core 1

VCore Voltage = (CPUZ)1.344/1.352/1.360 (BIOS)1.38750V drops to 1.328
31 seconds, error on core 1

VCore Voltage = (CPUZ)1.352/1.360/1.368 (BIOS)1.39375V drops to 1.336
44 seconds error on core 1
Click to expand...

Before I settle on the possibility that my CPU just doesn't overclock well I'd like to try other options first. I looked at graysky's guide and might try upping the North Bridge voltage next but there are a lot of youtube videos where people get 4.0 GHz by increasing only the CPU voltage to 1.28v. The fact that I cannot stress test in Orthos for very long even though I'm pushing the voltage to the limit of the 8400 puzzles me.
 
Not every cpu performs the same. My e8400 needed around a 1.4 VCC for 440x9fsb. Also I would be willing to bet that alot of those chips aren't 100% IBT/Prime stable. You also shouldn't leave your PLL, VTT and vNB at auto. It's dangerous, much more dangerous than a high VCC. It would also help you stabilize your clocks.
 
one thing to keep in mind here is that its possible to get that gigabyte board into a mode where NO overclock settings will apply and you are forever doomed to run the cpu at stock speeds. like if you try OCing 10mhz on the fsb it will just keep running the chip at stock speeds.
 
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