E6700

The 0507 BIOS adds a new feature in the BIOS under the "Advanced", "CPU Configuration" tab. Where there was no means to adjust CPU ratios in earlier BIOS versions, with 0507 you now have an adjustment range from 6X to 10X.


Some Conroe chips also unlock at the top, allowing ranges to about 14x. None of our Conroe chips unlocked up, but you may be one of the lucky ones who have a Conroe that unlocks both down and up.

The E6700, which runs at 2.67GHz, is very interesting because of the large headroom we consistently find at stock voltage. Once again, on the P5B Deluxe at stock voltage, the combo could run day and night at 3.4GHz (340x10) with no issues at all. At the stock multiplier of 10x, at 1.4875V the highest stable speed was 360x10 or 3.6GHz, At a reduced 9x the highest speed was 400x9, which is also 3.6GHz. With the new BIOS unlocking multipliers down, we reached 440 at 8x, or 3.52Ghz, as you can see in this screen capture.


7x allowed a further increase to a FSB speed of 494, which is where the 6700/P5B maxed out. Even at a 6X multiplier 494 seems the limit of the FSB with this CPU and board. Comparing this to our highest FSB overclock of 362 with this board in the Conroe Buying Guide we would conclude that ASUS has significantly improved the overclocking of the P5B. The ability to choose and hold lower multipliers allowed the bus speed to increase from 360 to 494.

E6600

The E6600 unlocked down with the new BIOS and allowed a new range of FSB adjustments of 405x9 (stock), 460x8, 495x7, and 495x6. Below is a screen capture at 495x7 or 3.465GHz.

Click to enlarge

While the new BIOS on the P5B adds enormous flexibility to the 965P motherboard, it should still be pointed out that on average the 965 still does not overclock as well as the Intel 975X if you compare clock to clock. You might want to look back at the 975X overclocking results in Conroe Buying Guide: Feeding the Monster for a comparison.

Index E6400 & E6300 – 2MB Cache
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  • ZachSaw - Friday, August 25, 2006 - link

    My posts were for Wesley and Gary only. They will know exactly what I was talking about with the subtle hints. Those of you who feel left out in the cold by my posts, I appologize. It was never meant to be a general post.

    And just to clarify, I do not speak for Intel. And again, for the record, I do not work for Intel.

    This is an article comment, not a message board. The posts I made were directed to the author.
    Reply
  • Questar - Friday, August 25, 2006 - link

    I find that people who say in public how superior they are to others generally aren't. Reply
  • Araemo - Friday, August 25, 2006 - link

    "This is an article comment, not a message board. The posts I made were directed to the author."

    The author's email address is posted at the top of every page of the article. If your comment was only intended for the author, email is a much better method of communication.

    It might also get you a more direct response. ;)
    Reply
  • Strunf - Friday, August 25, 2006 - link

    "This is an article comment, not a message board. The posts I made were directed to the author."
    This is where you’re wrong... the first post of a topic is generally related to the news/article but others are free and will most of the time comment your post, just like in any other message board. Even you have more than once posted a comment to posts made by other folks.
    Reply
  • splines - Thursday, August 24, 2006 - link

    That was for Zachsaw, by the way :) Reply
  • xsilver - Thursday, August 24, 2006 - link

    hence I think the reason for the other poster getting hostile and doubting legitimacy.

    either you have information and share it or zip up...
    analogous to say I overclocked my cpu to 100ghz, using 2 "special" tools, but I cant tell you what they are.
    Reply
  • mongo lloyd - Thursday, August 24, 2006 - link

    I wish Anandtech were more forthcoming with what kind of overclocks you can see with different memory/dividers, and compare the performance. Not everyone has the economical predisposition to buy super expensive "enthusiast" memory; and definitely not wanting to pay twice the price for 2-3% improvement in theoretical benchmarks, like in the past. I'm sick of the memory tunnel vision on hardware review sites. Reply
  • Gary Key - Friday, August 25, 2006 - link

    quote:

    I wish Anandtech were more forthcoming with what kind of overclocks you can see with different memory/dividers, and compare the performance. Not everyone has the economical predisposition to buy super expensive "enthusiast" memory; and definitely not wanting to pay twice the price for 2-3% improvement in theoretical benchmarks, like in the past. I'm sick of the memory tunnel vision on hardware review sites.


    These particular results were completed at 1:1 ratios with "very expensive" OCZ memory and is one of the major reasons why the FSB clocks are so high with the E6300/6400 chips. We realize that not everyone can afford this type of memory which was one of the main reasons behind our recent memory looks in the first Conroe buyer's guide and the DDR/DDR2 memory analysis on the ASRock boards. However, this article was about what is possible with the P5B using the top components available. As for benchmarks showing the differences between overclocks with different memory and dividers, that is a very good suggestion we will take under consideration. Thanks for the comments.
    Reply
  • Questar - Friday, August 25, 2006 - link

    Thanks Gary, this is exactly what we need. The question is "do memory dividers make a significant difference for Conroe". Reply
  • blackbrrd - Sunday, August 27, 2006 - link

    Yeah, I heard some rumours about the 965 chipset not overclocking well with a lower than 1:1 ration on the ram.

    I am interested in a low-cost overclock with 667mhz ddr2 ram and the E6300, to get the most bang for the buck. - Actually to use some of the money saved on the gfx card instead, due to most games beeing gfx card limited.

    In other words, a review of the P5B vanilla version with a E6300 and some generic ddr2 667 mhz ram would be really interesting ;)
    Reply

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