1 Reply Latest reply on Jul 17, 2014 9:40 AM by sylvia_intel

    Overclocking Intel 5520 Chipset on ICH 7/8/9/10 SMBus device and realtek 868 Clockgenerator


      I got a bit more rencent CPU - Westmere-EP Xeon X5650 with somewhat decent mainboard (Intel S5520HC - Intel 5520 chipset socket 1336 mainboard ) and since I was not overclocking such CPU on this board cuz its not possible , I would like to get some tips from guys that are sucesfull and know, how to overclock this system



      My goal is to overclock and to raise the BCLK from 133 to at least 150 and it should be possible cuz its the same chipset and clockgen like on the evga sr2 motherboard


      I tried to use SetFSB but it didnt work cuz the clockgen is not listed


      The clockgen was made by Realtek and its a Realtek RTM 868 Clockgenerator


      The problem is , i am not able to find any documentation or datasheet and i called the intel and realtek support but they are not allowed to give out any information to regular citizen



      There are some server motherboards with ability of overclocking for Socket B and 5520 and 5500 Chipset so i guess it should be possible as well


      I tried to write some values into the clockgen but it didnt accept my values


      i was able to access the clockgen by accessing the SMBus at SMBus device adress 0xD2 and 0xD3 @ offset 10bytes



      this are the default values of the clockgen


      3F1E F77F 05FC 201E 0159 16 bit word


      the next one below has worked but led into a crash of the system


      AAAAAAAA AAAAAAAA 0A0AAAAA AAAAAAAA @offset 24 byte 32bit dword


      The next one has worked as well but led into a crash


      --> F97D3E1F 421F08FF 00000465 32bit dword @offset 10byte



      i dont know where i can find the BCLK .. maybe some1 can help me


      3F1E F77F 05FC 201E 0159


      i tried to access device 02 by using the Super I/O device @offset 16 32bit dword and 72 @offset 24bytes but i didnt find anyting



      i think the easier way would be to to create a custom bios .. i would pay money for it


      i just want to raise the baseclock and /or qpi clock and uncore clock


      i got an Intel S5520 Hanlan Creek motherboard and 2 x Xeon X5650 CPUs


      The SMBus device is an ICH9 or ICH10 SMBus



      if you need some information.. send me a message

        • 1. Re: Overclocking Intel 5520 Chipset on ICH 7/8/9/10 SMBus device and realtek 868 Clockgenerator

          Hello FBDIMM, it is important to understand first that processor over clocking is a practice that overstresses the unit; hence it could be expected to have problems sooner or later. There is no processor capable to last the expected lifetime from factory if it is over clocked and Intel cannot guarantee the proper functionality of a CPU if it is being over clocked because every single unit is manufactured to run within specifications.


          Even though the unlocked CPUs and the Intel® Extreme Edition Processors are more robust to handle over clocking, this practice will reduce the life time of the unit and will generate damages; that’s why the warranty doesn’t cover it.


          We make unlocked and Extreme Edition Processors because there is a section of the computer market that likes doing that but they know this is a risk under their responsibility. Also there are OEM computer manufacturers that sell systems already over clocked from factory like Alienware and Northwest Falcon but they provide the warranty support if something goes wrong. We do provide recommendations for save over clocking but we provide as well a clear disclaimer about it. See the following web site and read the information at the bottom of the page:


          Over clocking Intel® Processors:


          From our side, this is all the information I could provide you, but you could wait for another user to reply to this thread with other recommendations.