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Phenom II On Ice: AM3 Overclocked With LN2

Phenom II On Ice: AM3 Overclocked With LN2
By , Ton Khowdee
Introduction

(Ed.: We had tons of fun with the guys from Team IRONMODS during our Overdrive Overclocking Championship. With AMD's Socket AM3 Phenom II processors on the horizon, we asked team member Ton "TiTON" Khowdee to do a pre-launch exhibition of the X3 720 Black Edition--a chip that AMD says should overclock better than the Phenom II X4 940 BE. He obliged, and provided this write-up and the following photo documentation of his efforts.)

This article will be a hardcore demonstration of AMD's latest Phenom II X3 720 Black Edition processor. This is not a traditional review of a processor. We are not focusing on 24x7 stability. Instead, we'll focus on passing benchmarks at the fastest possible speed. We will be putting AMD's latest Black Edition chip through the ultimate torture test. The CPU will be frozen with liquid nitrogen and its voltage cranked all the way up. We are going to dance on the fine line between breakneck speeds and complete CPU destruction. We will go to the dark side and see what performance rewards are awaiting those brave enough to travel down this path.

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  • 13 Hide
    cangelini , February 10, 2009 8:39 AM
    macer1Toms editor should really get his glasses checked. that of find a new job with all the mistakes in this artical..but good to see from AMD.


    Irony?
Other Comments
  • 2 Hide
    xx12amanxx , February 10, 2009 6:18 AM
    Sweet! Not bad for a 3ghz Overclock ehh. Im excited to see what the higher clocked version's will do.
  • -3 Hide
    accessgranted , February 10, 2009 7:16 AM
    [
    Quote:
    At 5.2 GHz, we were able to run this particular bench at 16 minutes and 36 seconds, compared to over 28 minutes at stock. This is an increase of over 40% in performance.
    It's a 75% (28/16 = 1,75) in performance, not 40%.
  • -3 Hide
    accessgranted , February 10, 2009 7:18 AM
    Quote:
    For WPrime 32M, we ran all 3 cores at 5.1 GHz and completed the bench at 10.609 seconds versus the stock results of 18.797 seconds. The results under LN2 are 44% faster.
    Wrong again :) 
  • 1 Hide
    JustPlainJef , February 10, 2009 7:51 AM
    No, AccessGranted, you are wrong. If the first one benched at 28 minutes, and it ran OC'ed in 14 minutes, that's a 50% increase. Since it ran in 16:36, that's less than a 50% performance increase. Same with the second one. 18.8 / 2 is 9.4. Benchmark finished in 10.6, which is less than a 50% increase. You are doing the math backwards as you always compare to the original number. 10.6/18.8 = 56% of the original or a 44% decrease in time.
    ;) 
  • 3 Hide
    cangelini , February 10, 2009 8:01 AM
    accessgrantedWrong again


    Formula: (New-Old)/Old*100 ;-)
  • 4 Hide
    accessgranted , February 10, 2009 8:14 AM
    If a benchmark takes 2 minutes at default and then 1 minute overclocked that's a 100% increase in performance. 100% increase in performance = 50% decrease in time. It's twice as fast thus taking half the time. It can't be any other way.
  • 6 Hide
    accessgranted , February 10, 2009 8:18 AM
    Ok, lets say a CPU scales perfect with clockspeed.

    X Mhz:
    Benchmark 1: 20 fps
    Benchmark 2: 20 sec

    2X Mhz
    Benchmark 1: 40 fps
    Benchmark 2: 10 sec

    It's 100% faster -> twice as many fps, half as long rendering time.
  • -2 Hide
    sohei , February 10, 2009 8:34 AM
    :)  hahaha ,,,
    anyway AMD cpu = Velocity Raptor
    the fabrication technology of this cpus is incredible
  • 13 Hide
    cangelini , February 10, 2009 8:39 AM
    macer1Toms editor should really get his glasses checked. that of find a new job with all the mistakes in this artical..but good to see from AMD.


    Irony?
  • 1 Hide
    accessgranted , February 10, 2009 8:42 AM
    Alot of the math is wrong. Didn't find any other obvious mistakes.
  • 0 Hide
    Lozil , February 10, 2009 8:46 AM
    It looks good to see AMD back... But What AMD needs now Is some winner CPU's which can take the crown away from Intel....
  • 4 Hide
    accessgranted , February 10, 2009 8:49 AM
    cangelini, the formula you wrote is only good for benchmarks where an increase in performance equals an increase in the unit that is measured (fps for example).

    The correct formula to use when an increase in performance equals a decrease in the unit measured is (Old/new)-1 = performance increase in percent
  • 4 Hide
    accessgranted , February 10, 2009 8:51 AM
    ((Old/New)-1)x100 = performance increase in percent
  • 1 Hide
    StupidRabbit , February 10, 2009 9:14 AM
    are we going to see something similar with the i7? i mean, is it possible or is there some crazy restriction.. (or something i missed in a different article)
  • 4 Hide
    foreignalien , February 10, 2009 9:30 AM
    Quote:
    accessgranted 02/10/2009 10:16 AM
    It's a 75% (28/16 = 1,75) in performance, not 40%.

    The operative word is performance. It is a ~75% increase in performance and a ~40% decrease in time. I have to agree, TH got it wrong.

    Numbers aside, awesome test!
  • 5 Hide
    cangelini , February 10, 2009 10:04 AM
    accessgrantedcangelini, the formula you wrote is only good for benchmarks where an increase in performance equals an increase in the unit that is measured (fps for example).The correct formula to use when an increase in performance equals a decrease in the unit measured is (Old/new)-1 = performance increase in percent


    I'm sorry, you're absolutely right Access. I've edited all of the author's original numbers to reflect the proper percentages. Thanks for the correction!
  • 6 Hide
    ravenware , February 10, 2009 11:23 AM
    macer1Toms editor should really get his glasses checked. that of find a new job with all the mistakes in this artical..but good to see from AMD.


    You should have your English checked.
  • 2 Hide
    jcknouse , February 10, 2009 11:40 AM
    This article has me excited to see all of the AM3s when they come out.

    This is making me want to build my first liquid-cooled gaming machine in the fall, which is hopefully when all the manufacturers should have their MBs on the market.

    Nice article, guys.
  • 2 Hide
    accessgranted , February 10, 2009 11:49 AM
    Quote:
    During the baseline run, AMD's Phenom II X3 720 Black Edition earned a score of 3463. With the processor running at -190 C at 4.5 GHz, we obtained a CPU score of 5262, which is over 34% faster.
    Another error ;) . It certainly is more than 34% faster but how much faster? 5262/3463 = 1,52 = 52% faster.

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