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AMD Fusion A8-3850 APU "Llano" On Linux

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  • #31
    Originally posted by Soul_keeper View Post
    I just put together an itx 3850 system

    I'll report back later with details when I get an OS installed and what not
    Yes please! What case are you using? Can you also post some results with undervolting and temperatures?


    • #32
      case is lian li PC-Q11
      I'll post pics later, I'm struggling with the software side of things now

      Can't figure out which modules are needed to get the sound to work on this thing ?
      anyone know ?
      an lsmod output from someone with working sound on a llano system would help

      running at 1.2v for now (fluctuates 1.16-1.21 on this asus F1A75-I board ...)
      lotsa bios settings to tune in


      • #33
        Ok, I got everything working

        First Small pts run comparing it to a bulldozer and my Q9450 system it'll replace

        the system idles around 50W compared to my Q9450 at around 100W idle

        I have pictures too
        this weblink could change later


        • #34
          Wow, that is an incredibly tight fit. Looks like the PSU barely fit. How do temps on the CPU look with that power supply sitting right on top of it?


          • #35
            appears idle is about 60c and load is about 70c if the sensors output is to be believed

            I just thru in a radeon 6670 making the fit even tighter
            I had to do this because the asus motherboard had a dvi-d instead of dvi-i or vga


            • #36
              Nice Setup, Soul_keeper!

              I also built up a system around the Q11 yesterday. But not with the A8-3850 (but nearly) - finances looked better so I took an i7-2600K+Asrwock Z68. Nice little setup! With a Corsair H60 (Mounted on a 140mm Alpenföhn EKL Wing Boost as front Fan), CPU temps never go above 50°C in Turbo! The biggest problem were the stiff water tubes from the H60, but with some light pushing all fit perfecty. I did not take photos. If you are interested, I would go and open the case (8 tiny screws - YEAH!).

              The A8-3850 I would have cooled with Scythe Shuriken (not Big Shuriken, that one is too big!). You would need to turn the CPU-Fan around, so it pulls away the hot air from the MoBo/cooler, so the direction of the air flow is the same as the one from the PSU-Fan (sitting directly above the cpu-fan). With opposite directions, both fans fight for the air, which would probably lead to heat problems.

              ATM installing Gentoo. 7 minutes 48 seconds for compiling glibc - yeah! An Athlon II X3 435@2,9GHZ needs 21m 15s - impressive speed gain. The X3 with WD Caviar Black, the i7 with WD Caviar Blue.


              • #37
                More benchmarks comparing to my old system and others

                Scythe Shuriken 100mm is the hsf I got
                the psu is fanless, silences and efficiency were my main goals with this build
                I'm not as concerned with high performance (I guess my tastes are changing)
                I had to modify the shuriken because the asus board has the cpu socket very close to the pcie slot. I simply bent the heatpipes leading to the upper heatsink moving it up maybe 20+mm


                • #38

                  now only if I could get the voltage to scale with powernow_k8 and the ondemand governor
                  voltages aren't shown in dmesg after loading powernow_k8, only the clockspeeds
                  the clock speeds appear to be changing, but power usage from the wall remains constant ...

                  any ideas ?


                  • #39
                    I think proper power management still depends on having the AMD proprietary driver installed.
                    If you want, you can dump your DSDT and peek inside after disassembling it with iasl -d. There you can check if the voltages are determined by the BIOS correctly or not.


                    • #40

                      Ok, I just did that. I'm not seeing which section would contain the voltages

                      Package (0x06)

                      bunch of those, so if that's what I think it is, then it's not being set right ....
                      Last edited by Soul_keeper; 10-23-2011, 08:07 AM.