1.    28 Mar 2016 #1
    Join Date : Mar 2016
    Posts : 12
    Windows 10 Professional 64-Bit

    Overclocking FSB for the AMD 8350


    So I'm working with overclocking using the FSB rather than the multiplier. In fact, I've been taking the multiplier down to keep everything "within spec."

    So right now I'm running at 304 FSB X 16 Multiplier with my RAM sitting at around 1292 and it's all great. I want to increase my FSB even more, but I can't seem to get it much higher. I'm shooting to run 323 X 15.5 so that my cores don't get so hot under all the voltage.

    My RAM is designed to run at 1333mhz at 1.65 volts, using 9/9/9/24/31/2T.

    So obviously, when I increase my FSB up to the 323 that I'm wanting to shoot for, I have to lower the HT Link and NB frequency to stay around the 2200mhz mark. At that FSB speed, I've got my RAM set to the 2nd to lowest ratio, and it's running somewhere around 1200 if I recall correctly, with the HT Link and NB Frequencies still in the 2000-2200MHz range.

    I guess my question is, why can't I push the FSB any higher even though I'm lowering the ratios of everything else to keep it all within target range?

    When I try and boot, my board LED is telling me I'm getting DRAM failure!

    I tried setting the CPU-NB Voltage to 1.3, which is significantly higher than the 1.19 it's running currently at the 304x16 but that didn't seem to help any...

    I have pretty nice case cooling and the H100 for the CPU so I've got all of the Load Line Calibrations set to Extreme/Ultra, although the only voltage I have manually set is the VCore, which is set at 1.43 and loads to 1.5.

    What's the purpose of running higher NB Freq and HT Link speeds if my RAM isn't surpassing 1333?
    Last edited by graphuto; 28 Mar 2016 at 02:32.
      My ComputerSystem Spec
  2.    28 Mar 2016 #2
    Join Date : Jul 2014
    Serbia
    Posts : 10,647
    W10 Insider + Linux

    If you are overclocking for performance gain than combination of multiplier and FSB is better. FX processors have MC of 1866MHz and going too far off, either up or down, produces strange results.
      My ComputersSystem Spec
  3.    28 Mar 2016 #3
    Join Date : Mar 2016
    Posts : 12
    Windows 10 Professional 64-Bit
    Thread Starter

    Quote Originally Posted by CountMike View Post
    If you are overclocking for performance gain than combination of multiplier and FSB is better. FX processors have MC of 1866MHz and going too far off, either up or down, produces strange results.
    Well, I can take it to 300 FSB and keep my RAM at around 12-1300, and the NB Freq/HT Link at around 2200. I'm thinking I'm just hitting my CPU's limit for the FSB clock? What voltage would I need to increase? Boots at 300 FSB x 16.5 and runs stable at 1.19 CPU-NB Voltage and 1.09 NB Voltage, but I tried bumping them to 1.3 and 1.22 respectively, and still, MoBo showing DRAM failure LED. Can not post at 323 FSB! So I guess I'm trying to figure out what exactly FSB clock is dependent on, but not able to find a lot of solid information.
      My ComputerSystem Spec
  4.    28 Mar 2016 #4
    Join Date : Mar 2016
    Posts : 12
    Windows 10 Professional 64-Bit
    Thread Starter

    I think I've found my answer through testing, and that is, that the 309 base clock is all that the CPU can physically push...
    Tried upping the voltages on CPU-NB, VCORE, DRAM, and NB all to no avail. And actually, between 310 and 315 baseclock, all of my RAM is not detected. Say at 315, only 4 Gigs of my 16 is detected. At 313 its 8 gigs, at 311 it's 12 gigs, and then at 309 I get my full 16 gigs.

    Typing that all out makes me kind of understand why I was failing to POST at my desired 323 base clock; apparently the CPU was not detecting any of my RAM.
    WHY!?!?!
    I wish I understood more about the behind the scenes so I could understand why it's behaving this way!
      My ComputerSystem Spec
  5.    29 Mar 2016 #5
    Join Date : Jul 2014
    Serbia
    Posts : 10,647
    W10 Insider + Linux

    Watch out for MC, it has only 2 lines and when you use up all memory slots it can cut down on possible OC.
      My ComputersSystem Spec
  6.    29 Mar 2016 #6
    Join Date : Mar 2016
    Posts : 12
    Windows 10 Professional 64-Bit
    Thread Starter

    Quote Originally Posted by CountMike View Post
    Watch out for MC, it has only 2 lines and when you use up all memory slots it can cut down on possible OC.
    What does this mean, exactly?
      My ComputerSystem Spec

 


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