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Intel D865GLC AA C28906-410 Recap

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    #41
    Re: Intel D865GLC AA C28906-410 Recap

    I'm just being a smart ass; it's been so long since I ordered anything from them that I truly forgot they even existed.

    Thanks for the reminder, I'll order all the needed 8mm and 10mm sp-caps from them if they have.

    Thank you sooooooo much dude...
    Does an idiot make a sound if no one’s there to hear them talk?



    Comment


      #42
      Re: Intel D865GLC AA C28906-410 Recap

      Oh god! Don't say dude to him. Geeze, the last guy....

      Well, let's just say it wasn't pretty. hehehehehee

      >>why didn't I find them in my Mouser cat...<<

      ROFL!

      The new on is over 2-1/2" thick and just about 4 pounds.

      Toast
      veritas odium parit

      Comment


        #43
        Re: Intel D865GLC AA C28906-410 Recap

        lol

        I take the dude thing back.

        Thank you Sir...
        Last edited by MegaOne302; 05-12-2009, 07:04 PM.
        Does an idiot make a sound if no one’s there to hear them talk?



        Comment


          #44
          Re: Intel D865GLC AA C28906-410 Recap

          Nah, this is Tuesday.
          Dude is okay on Tuesday.
          Mann-Made Global Warming.
          - We should be more concerned about the Intellectual Climate.

          -
          Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

          - Dr Seuss
          -
          You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
          -

          Comment


            #45
            Re: Intel D865GLC AA C28906-410 Recap

            You're the best...
            Does an idiot make a sound if no one’s there to hear them talk?



            Comment


              #46
              Re: Intel D865GLC AA C28906-410 Recap

              That's odd…

              Looks like they don't make 16v 1200uf sp-caps. The closest match I find is 16v 1000uf; is it ok to use those for the 12v line?

              Looks like anything over 1000uf can use an low e-cap.
              Last edited by MegaOne302; 05-13-2009, 03:54 PM.
              Does an idiot make a sound if no one’s there to hear them talk?



              Comment


                #47
                Re: Intel D865GLC AA C28906-410 Recap

                I'm guessing the 1200uF 16v are the VRM input caps. ???

                uF isn't so important there as ESR.
                Assuming 3 or 4 VRM input caps. it's common practice when Switching from lytics to sp in VRM input to use 330uF-16v or 470uF-16v polys.
                That's also what you'll usually see on boards that come with polys there originally.
                My preference is 470uF 16v or to use the Intel-Dell method below.

                A number of Intel boards built for Dell mix one lytic with two polys in VRM input.
                Since all 3 [or 4] are in parallel that gives the best of both worlds.
                - Very low ESR and uF not so low.

                For those caps the ESR keeps the noise out and the uF smooths out PSU voltage fluctuations from load changes and start-up/shutdown ops.
                Using one 16v 1800uF [or up] lytic there isn't a bad idea just in case the mobo some day gets attached to a crappy PSU that lets voltage wander around.
                .
                Mann-Made Global Warming.
                - We should be more concerned about the Intellectual Climate.

                -
                Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                - Dr Seuss
                -
                You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                -

                Comment


                  #48
                  Re: Intel D865GLC AA C28906-410 Recap

                  So there are two VRM banks, one for the 2.5v for the Vcore ESR filtering and one 16v bank for gross ESR filtering of the PSU.

                  I still don't fully understand what the uf value means; is it the repeated ripple value the cap can handle?
                  Last edited by MegaOne302; 05-13-2009, 05:38 PM.
                  Does an idiot make a sound if no one’s there to hear them talk?



                  Comment


                    #49
                    Re: Intel D865GLC AA C28906-410 Recap

                    Originally posted by MegaOne302
                    I still don't fully understand what the uf value means; is it the repeated ripple value the cap can handle?
                    uF is capacitance in Micro-Farads
                    The Ripple rating is how much Ripple Current can pass through the cap without it overheating. It is similar to the Watts rating on a resistor.

                    Originally posted by MegaOne302
                    So there are two VRM banks, one for the 2.5v for the Vcore ESR filtering and one 16v bank for gross ESR filtering of the PSU.
                    No.
                    Not two banks.
                    Power-In side and Power-Out side.

                    See PIC. [Only one cap shown in each spot for simplicity.]
                    -
                    VID tells Controller what Vcore voltage should be on CPU.
                    Controller Senses the Vcore voltage.
                    Controller turns MOSFETs on-off [very fast] to adjust voltage.

                    VRM-IN caps give MOSFETs clean power by filtering out noise from PSU.
                    VRM-OUT caps give CPU clean power by filtering out on-off pulses from MOSFETs.

                    Attached Files
                    Mann-Made Global Warming.
                    - We should be more concerned about the Intellectual Climate.

                    -
                    Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                    - Dr Seuss
                    -
                    You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                    -

                    Comment


                      #50
                      Re: Intel D865GLC AA C28906-410 Recap

                      Double filtering for the CPU I see.

                      Ok, so the two cap banks act as filters but in kind of different ways.
                      The VRM-In bank filters the 12v line-in, protecting the MOSFET-in from line noise and surges.

                      Then

                      The VRM-out bank filters the MOSFET-out, protecting\stabilizing the voltage to the Vcore from a kind of switching noise.

                      Did I get everything?

                      And I thought DC current was easer tamed…

                      Really nice drawing BTW…
                      Does an idiot make a sound if no one’s there to hear them talk?



                      Comment


                        #51
                        Re: Intel D865GLC AA C28906-410 Recap

                        You're getting it now!!

                        MOSFETs are basically switches that turn on-off very fast.
                        They aren't on-off at the same time [or length of time].
                        Controller adjusts their on-off 'duty cycles' to get the desired voltage for Vcore.
                        -
                        The switching action of the MOSFETs causes pulses that the VRM-OUT caps filter out.
                        Mann-Made Global Warming.
                        - We should be more concerned about the Intellectual Climate.

                        -
                        Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                        - Dr Seuss
                        -
                        You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                        -

                        Comment


                          #52
                          Re: Intel D865GLC AA C28906-410 Recap

                          There aren't any modern processors with a Vcore over 2 volts so 2.5v rated caps are just fine there.
                          Mann-Made Global Warming.
                          - We should be more concerned about the Intellectual Climate.

                          -
                          Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                          - Dr Seuss
                          -
                          You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                          -

                          Comment


                            #53
                            Re: Intel D865GLC AA C28906-410 Recap

                            Yes, I was thinking the same. The Vcore was around 1.34v

                            Tanks for today's lesson.
                            Does an idiot make a sound if no one’s there to hear them talk?



                            Comment


                              #54
                              Re: Intel D865GLC AA C28906-410 Recap

                              Hi PC,

                              Is there any way to view the capacitance and ripples in a circuit with the cap left in? I have a feeling many motherboard caps uf are overshot to get the ESR low.

                              Thanks,

                              Joe
                              Does an idiot make a sound if no one’s there to hear them talk?



                              Comment


                                #55
                                Re: Intel D865GLC AA C28906-410 Recap

                                You'd need an O'scope to see ripple.
                                Mann-Made Global Warming.
                                - We should be more concerned about the Intellectual Climate.

                                -
                                Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                                - Dr Seuss
                                -
                                You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                                -

                                Comment


                                  #56
                                  Re: Intel D865GLC AA C28906-410 Recap

                                  Can one be easily built or cheaply bought from eBay? If so, can you recommend a very basic one?
                                  Does an idiot make a sound if no one’s there to hear them talk?



                                  Comment


                                    #57
                                    Re: Intel D865GLC AA C28906-410 Recap

                                    Build an Oscilloscope? . Not likely.

                                    You can find them on ebay and if you're patient come in under $200 and -sometimes- a lot less [$100 ??] but you need to be careful about getting one that actually works. - LOTs of busted ones for sale on eBay.

                                    Ideally you'll need a Digital Storage Oscilloscope [DSO] or at least a Storage O'scope vs an Analog. Analog is best used for signals that repeat over and over without changing and noise doesn't do that. A Storage scope will capture a moment in time and display it vs changing on every refresh of the screen as an Analog scope does.

                                    A 20MHz Bandwidth as adequate for SMPS noise but 60-100MHz are fairly cheap and you can do much more with them.

                                    There are also USB versions that display on a PC that are adequate and it's kind of handy to be able to save the image on the PC which most regular scopes can't do and most that do need a bunch of extra gadgets.

                                    I have an old Mainframe Tektronics with plug-in bays that lets me swap plug-ins to reconfigure the scope for different things. With the right plug-ins it can be bumped up to 1Ghz or even changed into a Spectrum Analyzer. I presently have 6 plug-ins for it and currently it's good to 400 MHz. The down sides are it's BIG and HEAVY and those plug-ins need a bunch of room in a clean static free storage space.

                                    Also have a light weight Tektronics 60MHz scope that the F*K-WADs from FedEx dropped on the front and smashed all the knobs off, broke the front face-plate into 6-8 pieces, and snapped the handle in half. Insurance paid for it 100% but I was wanting a lighter O'scope, not another project...

                                    I actually -just- ordered a Hantek DSO-2150 60MHz USB scope yesterday but it's obviously not here yet so I can't offer a review.
                                    Those usually run $200-$230 or so on eBay.
                                    http://www.hantek.com.cn/english/pro...st.asp?unid=63

                                    There's a long scope discussion here about an Owon Scope and scopes in general:
                                    https://www.badcaps.net/forum/showthread.php?t=6312

                                    .
                                    Last edited by PCBONEZ; 05-17-2009, 01:24 AM.
                                    Mann-Made Global Warming.
                                    - We should be more concerned about the Intellectual Climate.

                                    -
                                    Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                                    - Dr Seuss
                                    -
                                    You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                                    -

                                    Comment


                                      #58
                                      Re: Intel D865GLC AA C28906-410 Recap

                                      OMG, Bob is here too? That discussion is a must read...

                                      I know what you're saying, I too am FedUp with FedEx, hope they fold soon.

                                      Thanks for your knowledgeable advice sir.

                                      Keep us informed on the USB scope performance.

                                      Joe
                                      Does an idiot make a sound if no one’s there to hear them talk?



                                      Comment


                                        #59
                                        Re: Intel D865GLC AA C28906-410 Recap

                                        Originally posted by Toasty
                                        Shadow-

                                        Can you visually check the 3 caps there and report their labeled voltages?

                                        Cheers!
                                        Toast
                                        Bah, finally got around to doing this.

                                        The new CPU cooler that I ordered got lost in the mail!
                                        Australia Post

                                        Eventually I got it and now it is finally fully installed. I checked out the caps while I had the PC case open.

                                        The electrolytic caps are 820uF, 6.3V Nichicon HN(M).
                                        This is the second revision of the motherboard (after the HN(M) capacitor problem plagued this motherboard).

                                        I am surprised that Intel still decided to use these capacitors.

                                        Having said this, the ones that I have are most likely not plagued by the HN(M) capacitor problem. They have been running for years without even a hiccup. Too bad I never bothered to note down the date stamp for the capacitors.

                                        Comment


                                          #60
                                          Re: Intel D865GLC AA C28906-410 Recap

                                          You drew a diagram minus a inductor coil! This is vital item. This take pulses from the MOSFETs and inductor coil does a "flywheel" in electrical inertia so ripples and spikes are minimized and futher filtered with v-core capacitors.

                                          Cheers, Wizard

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