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Problems Overclocking E8400

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  • CPUs
  • Overclocking
  • RAM
Last response: in Overclocking
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February 17, 2009 3:25:41 AM

Hey everyone,

I am trying to OC e8400 to 3.6 GHz. on an ASRock P43Twins1600 MB. Right now the FSB is at 333 and I try to increase 20% (I think) to 400. My ram is DDR2-800, but it automatically clocked itself down to 667. I want to have a 1:1 ratio with the FSb:Ram. I set the FSB to 400, but didn't touch the ram timings or the Vcore and hit Save and Exit. The machine shut down instantly and rebooted past the BIOS, but then all I get is a blank black screen.

Here are some stats:

CPU: e8400
MB: ASRock P43Twins1600 (Rated for 1600 FSb)
HSF: Zalman CNPS 9500 (Idles @ 37c, 40 under load)
GFX: BFG 8800gts 640 (Stock OC to 580, 850)
Ram: DDR2-800
PSU: XION 600 W Mod 12 V rail
Case: CoolerMaster Cm-690

Any tips or recommendations would be great. I read through the OC for newbies and dwnled the software. Memtest tested for about 5 hrs with no prob, and Prime95 at my current settings for a whole day. I have been scared to mess with the RAM timings and the Vcore because I don't totally understand what to do yet. Any help is greatly appreciated. Thanks everyone!

More about : problems overclocking e8400

February 17, 2009 4:15:07 AM

You might want to check and see if you RAM voltages are correct. For instance I have a set of OCZ Reapers that require 2.2V and not 1.8ish which is standard for most mobo's. This could potentially cause a problem with it not reaching DDR2-800 speeds. Just a thought.
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February 17, 2009 2:06:15 PM

i'm not entirely sure on this one, but as soon as i googled that PSU, i immediately saw that it is not a good performer... look into your power supply first i would say... Also, try to find out what stepping your 8400 is, C0 or E0. C0 will not OC with as much ease as the E0 would...
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February 17, 2009 11:43:36 PM

jonpaul37 said:
i'm not entirely sure on this one, but as soon as i googled that PSU, i immediately saw that it is not a good performer... look into your power supply first i would say... Also, try to find out what stepping your 8400 is, C0 or E0. C0 will not OC with as much ease as the E0 would...



Some C0's are very nice, Take a gander at this thread:

http://www.xtremesystems.org/forums/showthread.php?t=18...

Some of them are running lower volts than my E0. :cry: 
!