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AMD Shanghai Opteron CPUs On Linux

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  • #16
    MSI DKA790GX with BIOS v1.6

    It isn't even one of the newer boards... it's shipped with 790GX/SB750!

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    • #17
      Originally posted by webdoctors View Post
      Interesting... What motherboard do you have?
      I have a phenom 9500, and it only supports 2 CnQ modes (1100 MHz, 2200 MHz) under Linux, using a Gigabyte 770 AM2+ board.

      i had read earlier that cpufreq wasnt working when phoronix reviewed the opteron 2356

      not sure if its because of the bios or linux kernel...
      it'd be great to know before I buy one

      Your 9500 shows only 2 values because there are actually only two values on the processor. I actually filed a bug report with that on the kernel and after further investigation and confirmation from AMD that the Phenoms only had two values and it was actually the windows C'n'Q driver that was misreporting the additional values.

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      • #18
        per core dynamic frequency voltage scaling on AMD Shanghai

        Hello,

        does anyone know whether it is possible to perform DVFS on a per-core basis? That would mean that it is possible to set one core at frequency F1 and another core (in the same chip) at frequency F2 (F1!=F2).

        Have you performed any test like this one? For example the command 'cpufreq-info' can provide that information.

        Thank you for any information you can provide us on this.

        Best Regards,
        Victor

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        • #19
          Originally posted by webdoctors View Post
          Hi,

          I'm curious, when testing the Shanghai Opteron CPUs in Linux, did cpufreq work?

          Were you able to change the frequency of the cpu's through linux?

          Or did the BIOS not support this.

          Thanks,
          I have a SuperMicro H8DME-2 with two Shanghai Opterons on it. I'm running Fedora 10. CPUfreq just works by default, I didn't have to do anything. At idle it runs 800 MHz. The steps are: 800 MHz, 1.3 GHz, 1.8 GHz, 2.5 GHz.

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          • #20
            AMD Shanghai Opteron CPUs On Linux

            I seem to have difficulty finding reviews relating to the AMD Dual Core Opteron 185. I believe its the last Socket 939 upgrade. The only thing I know about this cpu is from people from other forums saying how good it was. Any suggestions and comments as to where I can read a review about it, or you may have your own opinion or experience of it? How long has this cpu been around?

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            • #21
              Originally posted by jidacoadway View Post
              I seem to have difficulty finding reviews relating to the AMD Dual Core Opteron 185. I believe its the last Socket 939 upgrade. The only thing I know about this cpu is from people from other forums saying how good it was. Any suggestions and comments as to where I can read a review about it, or you may have your own opinion or experience of it? How long has this cpu been around?
              Good chip, overclockable, somewhat old being around since the summer of 2006.

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              • #22
                Looks like the Opteron 185 launched in March 2006. I don't have any experience with it but all the posts I saw seemed to think well of it. A number of posts commented that it was very similar to an FX-60 but with a locked multiplier and aimed at 24/7 server business. Seems to be around the -5000 level of performance; not sure what CPU you're running now.

                It apparently sold for a bit over $1000 originally, hope the price has come down
                Last edited by bridgman; 08-26-2009, 08:15 PM.

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                • #23
                  I still have one running in my Asus A8V-Deluxe, with 4GB of registered ECC DDR400. No problems with the chip itself, although the Asus BIOS didn't recognize it and therefore didn't enable C'n'Q for it. But I copied some ACPI tables from an Opteron 280 and tweaked them to get that enabled. It's actually still running OpenSUSE 10.2 with cherrypicked patches from 10.3; I've been loathe to update it because it's basically just humming along. Looking at my logs, "last reboot" was November 17 2007.

                  It was around the $300 mark when I got it, replacing an X2 3000+ which I gave to a friend.

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                  • #24
                    Originally posted by betabandido View Post
                    Hello,

                    does anyone know whether it is possible to perform DVFS on a per-core basis? That would mean that it is possible to set one core at frequency F1 and another core (in the same chip) at frequency F2 (F1!=F2).

                    Have you performed any test like this one? For example the command 'cpufreq-info' can provide that information.

                    Thank you for any information you can provide us on this.

                    Best Regards,
                    Victor
                    four month late, but yes. at least with phenom/phenom2

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