Overclocking

Overclocking lower end CPUs is always more fun if you're actually buying these things because, as long as the manufacturing process is mature and your component selection is sound, you're usually able to reach much higher speeds than you paid for - an ever rewarding achievement. The Athlon 64 X2 CPUs have been fairly good overclockers, with the X2 3800+ usually able to run anywhere from 4600+ speeds (2.4GHz) up to FX-62 speeds (2.8GHz) and sometimes slightly beyond (3.0 - 3.1GHz). While we don't have any Socket-AM2 Athlon 64 X2 3800+ CPUs on hand (we will use a 4600+ and underclock it for our benchmarks), we do have performance results of the X2 4200+, 4600+ and FX-62 to give you an idea of where an overclocked X2 3800+ can get you performance-wise.

What we didn't know previously however was how far we could overclock retail E6300/E6400 CPUs, and furthermore we had no idea what a highly overclocked 2MB Core 2 Duo CPU would perform like. Armed with two B1 stepping Core 2 Duo CPUs, one E6300 and one E6400, we went to task on overclocking them. Our goal wasn't to reach the absolute highest overclocks using high end cooling, but rather the maximum stable overclocks easily attainable with a stock Intel heatsink/fan. Undoubtedly we could have reached higher frequencies with more elaborate cooling, but we were more interested in the bare minimum of what was attainable - and we weren't disappointed.

Our E6300 was able to reach 2.592GHz using a 370MHz FSB at 1.400V (up from 1.320V stock):

Our E6400 was a bit more successful, reaching 2.88GHz using a 360MHz FSB at 1.350V (up from 1.300V stock):

Both CPUs were totally stable when overclocked and were able to complete our multiple days of benchmarking without behaving any less stable than when clocked at their default frequencies.

Index The Test
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  • jonp - Sunday, September 02, 2007 - link

    The text above the chart for the E6400 says 2.88GHz at 360 MHz FSB at 1.350V (with a multiplier of 8).
    The chart however shows 1.312V; which is what my stock E6400 runs at.
    So what's up?
    Reply
  • Killer4Hire - Sunday, October 29, 2006 - link

    I agree about your test making the AMD cpu's look none overclocking and at the crazy price of DDR2 ram and the MOBO i just don,t see the bang here..

    My 3800+ X2 non AM2 on Cheap DDR ram can,t bring it also and make the FX62 look bad.. at 2.6Ghz it scored 7232points in 3Dmark05 cpu test on cheap DDR at a $45Mobo.. where dose that put me in your chart?? oh i am sure she could do 3.0Ghz also..
    Reply
  • sergejvictorov - Wednesday, August 02, 2006 - link

    Can anyone help me as to what RAM clockspeed I need to buy in order to overclock the E6300 on an ASUS P5B Deluxe board to - let's say - 2.592 GHz? Is DDR2-675 from Corsair sufficient? Thanks in advance Reply
  • Nfarce - Friday, July 28, 2006 - link

    Hey look, I was about to plunk down serious bux for an X2 setup to replace my aging P4 o'clkd 3.6xx system (that replaced an Athlon prior, that replaced a PIII prior.. blah blah). Don't you bedwetters know that this give and take is cool for everyone? No, I guess not for EVERYONE. I guess not for those butt pirates with their heads stuck so far up AMD's @ss that they can't see anything but "bias" in a review that shows FACTS. That's ok AMD girlz, take your soccer balls and go home now after trashing Anandtech. Don't forget to dry out your pretty pink wet panties. Reply
  • aznskickass - Saturday, July 29, 2006 - link

    Man you are the thickest fanboy I have ever seen.

    Since you obviously have no interest in E6300 overclocking whatsoever, and will therefore have no fcuking clue what you're talking about, let me enlighten you:

    E6300s with Gigabyte DS3 boards are hitting 3.3 - 3.5GHz on air cooling. Check XS forums if you don't believe me. That is the equivalent of an X2 @ 4.1 - 4.4GHz. What are your beloved X2 3800+s getting? 2.8GHz? 3GHz if you're lucky?

    That means, with the right mobo, an o/ced E6300 can outperform an o/ced 3800+ by at LEAST 25%.

    You just got owned fanboy. Get a clue FFS.
    Reply
  • deathwalker - Friday, July 28, 2006 - link

    So how long will it take AMD to come up with a competitive response to the Core 2 Duo? Or better yet...do they even have a competitive response in the pipeline? Reply
  • snorre - Thursday, July 27, 2006 - link

    It was nice knowing you, at least uptil Intel bought you lock, stock and barrel. After reading your latest reviews I have no doubts left in my mind, you're officially gone the THG route. I used to be a lojal reader and both linked and recommended your site to other people for unbiased information, but I will stop doing this now for obvious reasons. I hope you'll wake up and smell the coffee soon before you loose any more readers. Good-bye! Reply
  • goinginstyle - Thursday, July 27, 2006 - link

    So what are they suppose to do? Lie about Conroe's performance? You are one of the biggest AMD fanbois around, sometimes it hurts but suck it up as Intel won this round. There was not anything biased about this article or their coverage. They have been just as big AMD fans as Intel fans since the website started. Leave if you must, but do not do it because the numbers tell the truth. Reply
  • najames - Friday, July 28, 2006 - link

    Oh boy, oh boy I want to buy one of these Conroe's right now. I'm gonna order one.

    Hmm, Newegg doesn't have them, Monarch doesn't have them, it seems nobody has them.

    Why are we worrying about comparing vaporware to something that has been out for a long time. Why don't we just compare the Conroe to an upcoming AMD 4x4 then? It's all vaporware then at least.

    Oh and let's make sure we compare lots of 64bit stuff too, after all there has been 64bit OSs around for about 15 years now.
    Reply
  • Gary Key - Saturday, July 29, 2006 - link

    quote:

    Hmm, Newegg doesn't have them, Monarch doesn't have them, it seems nobody has them.


    I ordered two from Tiger Direct and one from ZipZoomFly. No issues, received one today and the other two on Monday. :)
    Reply

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