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E8400 Newbie OC'ing help!

Last response: in Overclocking
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August 20, 2008 12:52:18 AM

Hello, I have an E8400 with a GA-EP35-DS3L (F5). The HSF is an Arctic Cooling Freezer 7 Pro with Arctic Silver 5. I have taken all the necessary precautions (turning off features such as C1E). I tried running a micro overclock of 350x9 (3.15 GHz) stock voltages and Windows booted fine, prime95 stable, etc. I tried running 400x9 and normal voltages, and XP would not boot. I turned up the voltages slightly until I got to 1.30v, which seems like way too much. And even at that voltage, prime95 fails after 1 minute. When I open up CPU-Z it tells me that the CPU is running at 1.264v... why? When I go into the Memory tab of CPU-Z, it tells me my RAM is running at 480 Mhz? Why? Shouldn't it be running at 400, as the FSB is 400? What am I doing wrong?

More about : e8400 newbie ing

August 20, 2008 5:53:39 AM

doomsdaydave11 said:
Hello, I have an E8400 with a GA-EP35-DS3L (F5). The HSF is an Arctic Cooling Freezer 7 Pro with Arctic Silver 5. I have taken all the necessary precautions (turning off features such as C1E). I tried running a micro overclock of 350x9 (3.15 GHz) stock voltages and Windows booted fine, prime95 stable, etc. I tried running 400x9 and normal voltages, and XP would not boot. I turned up the voltages slightly until I got to 1.30v, which seems like way too much. And even at that voltage, prime95 fails after 1 minute. When I open up CPU-Z it tells me that the CPU is running at 1.264v... why? When I go into the Memory tab of CPU-Z, it tells me my RAM is running at 480 Mhz? Why? Shouldn't it be running at 400, as the FSB is 400? What am I doing wrong?


Turn off C1E and EIST. All chips are different but most people have no problem running 3.60 ghz without an increase in voltage. I run the same mobo and CPU as you and didn't have any issues with that OC. Try changing your memory multiplier to 2.0 (it is 2.2 by default)

As for your voltages not matching (BIOS vs CPU-Z), this is normal. Your voltage in CPU-Z will always be less than what you set in BIOS. You want to be sure that your voltage @ load stays below intels specification of 1.3625. Idle will be a higher voltage but as I was informed, since there isn't much current flow while idle it isn't an issue if this goes slightly higher than intels stated max.
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August 20, 2008 6:18:45 AM

I have mine at 1.275v @ 3.6 ghz
August 20, 2008 7:30:20 AM

RyanS2000 said:
Turn off C1E and EIST. All chips are different but most people have no problem running 3.60 ghz without an increase in voltage. I run the same mobo and CPU as you and didn't have any issues with that OC. Try changing your memory multiplier to 2.0 (it is 2.2 by default)

As for your voltages not matching (BIOS vs CPU-Z), this is normal. Your voltage in CPU-Z will always be less than what you set in BIOS. You want to be sure that your voltage @ load stays below intels specification of 1.3625. Idle will be a higher voltage but as I was informed, since there isn't much current flow while idle it isn't an issue if this goes slightly higher than intels stated max.

Here are all my settings. These will not boot, and the only thing i change to make it boot is turn the voltage up to 1.3v, and even then its not stable.
Motherboard Intelligent Tweaker:
http://img513.imageshack.us/img513/5821/img0833nv1.jpg
http://img508.imageshack.us/img508/2953/img0834ut6.jpg

PC Health Status:
http://img242.imageshack.us/img242/4647/img0835af1.jpg

PnP/PCI Config:
http://img242.imageshack.us/img242/3900/img0836ef5.jpg

Power Management:
http://img508.imageshack.us/img508/3753/img0837ye1.jpg

Integrated Peripherals:
http://img171.imageshack.us/img171/763/img0838md5.jpg

Advanced BIOS Features:
http://img171.imageshack.us/img171/9958/img0839ht5.jpg

Standard CMOS Features:
http://img247.imageshack.us/img247/843/img0840rm2.jpg
August 20, 2008 3:42:52 PM

doomsdaydave11 said:
Here are all my settings. These will not boot, and the only thing i change to make it boot is turn the voltage up to 1.3v, and even then its not stable.
...


Everything looks pretty much run of the mill as far as your settings go. A 1.30 BIOS vcore isn't all that high, why are you so reluctant to keep it at what allows you to boot. My E8400 is running at 4.0ghz with a BIOS vcore of 1.3750. What do your temperatures look like?

August 20, 2008 6:14:51 PM

RyanS2000 said:
Everything looks pretty much run of the mill as far as your settings go. A 1.30 BIOS vcore isn't all that high, why are you so reluctant to keep it at what allows you to boot. My E8400 is running at 4.0ghz with a BIOS vcore of 1.3750. What do your temperatures look like?

I just really want to be careful :) 

Everyone seems to be able to run their chips at 3.6 stock without too much trouble. My temps at 1.30v are about 34 Idle and 47 load. I'll turn the vcore up to 1.3250v
August 21, 2008 2:29:49 PM

doomsdaydave11 said:
I just really want to be careful :) 

Everyone seems to be able to run their chips at 3.6 stock without too much trouble. My temps at 1.30v are about 34 Idle and 47 load. I'll turn the vcore up to 1.3250v


1.3250v BIOS voltage is still super low. If you look at your voltage in CPU-Z under load or idle, you will see it is still well below intels spec. After setting it to 1.3250 in BIOS, hit F10 to save changes then boot back into BIOS and look at Health Status. Your CPU voltage should be still in a safe spot.
!