General CPU FAQs
| Intel P 4 | Intel P III | Intel P II | Intel Celeron | Intel Xeon | AMD Athlon / Duron |
 
 

  1. What CPUs can I use on my motherboard?
    Please visit Tyan's CPU compatibility charts.
     
  2. What CPUs can I run in dual CPU mode?
    Currently, certain types of Intel and AMD CPUs can run in dual mode at this time.  (for example, Intel FC-PGA2 PIIIs have to have 512Kb cache to work in dual mode, the 256Kb versions do not work in dual mode.)  Cyrix, IBM and IDT CPUs are not supported in dual mode however, they will run in single mode on a dual board.  Note: dual mode operation requires both CPUs to be the same speed, make, and type.
     
  3. Can I overclock my CPU?
    Over clocking your CPU is not recommended by Tyan; therefore, we are not able to provide technical support to those who are over clocking their CPUs.  Over clocking your CPU may cause damage to your system board and/or shorten the life expectancy of your CPU.

    If you would like a faster CPU, please purchase the CPU best fitted for your needs.

    However, if you do experiment with over clocking, we suggest using heat sink compound between the CPU and cooling device.  We have noticed that most Intel CPUs are now clock limited so that any setting above it's intended use will cause the system to not post or boot.  In other instances, we have noticed that the CPU will show a lower CPU speed than what you actually have.
     
  4. Do dual CPUs really speed up my system?
    Yes, but only in certain environments.  Some operating systems which use dual CPUs are Microsoft Windows 2000, XP, Windows NT Server or Workstation and various flavors of UNIX.   Windows 95 or 98 does not take advantage of dual CPUs.  Using dual CPUs with Windows 95/98 and DOS will work but the O/S will not take advantage of the second CPU.

    In addition to a dual CPU aware O/S, you will also need an application that utilizes dual CPUs.  These programs usually fit into the CAD, Animation, or Graphic Design categories and include such programs as Kinetix 3D Studio MAX, Microsoft's Soft Image, Adobe's Photoshop, and Alias/Wavefront's Maya.  If you have any questions as to whether or not your application supports dual CPUs, please contact the software publisher or your reseller.

    There are 3 requirements for dual processing to be beneficial:
     
    • A motherboard capable of dual CPU operation
    • An operating system capable of utilizing dual CPUs
    • An application capable of utilizing dual CPUs
       
  5. How do I install the CPU on my motherboard?
    Slot 1 and Slot 2 CPUs require the use of retention braces to secure them onto the motherboard.  Instructions on CPU installation can be found by clicking the appropriate links to the Installation Information page.
     
  6. When I turn my computer on, the system displays strange CPU speeds.
    The solution to this is to first check that you have the correct CPU jumper speed settings.  CPU Speed jumpers can be found in our Motherboard FAQ section.  Next, verify that your CPU is indeed what your ordered.  If you order a 150MHz CPU, make sure it's not a 120.  Overclocking may also play a role in strange CPU speed behavior.  NEVER overclock a CPU.  Overclocking may damage your CPU, system or both and will void your warranty.  If you have an older sound card, try moving the sound card to the last ISA slot closest to the edge of the board.  This will resolve most problems but if this fails, it's possible that there may be a problem with the motherboard's clock generator.  Return the motherboard to the dealer for repair or replacement.
     
  7. Why does my OS show 2 CPU's when I have only 1 installed?
    The CPU that you are using supports Hyperthreading.  There is nothing wrong with your OS other than it is picking up the CPU's hyperthreading support and thus it treats it as 2 CPU's. 
     
  8. Why does my OS show 4 CPU's when I have just 2 installed?
    The CPU's that you are using support Hyperthreading.  There is nothing worng with your OS other than it is picking up the CPU's hypthreading support and thus it treats them as 4 CPU's.
     
  9. I'm going to use Hyperthreading capable CPU's and I'm not sure if my OS can support this technology.  Is there any information that can clarify this inquiry?
    Yes please see the chart below for hyperthreading support.

    Windows 2000 Version

    Maximum Processor Limit

    Windows 2000 Professional

    2

    Windows 2000 Standard Server

    4

    Windows 2000 Advanced Server

    8

    Windows 2000 Datacenter Server

    32

     

    Windows  Version

    Maximum Physical Processor Limit

    Maximum Logical Processor Limit

    Windows XP Home Edition

    1

    2

    Windows XP Professional

    2

    4

    Windows .NET Standard Server

    4

    8

    Windows .NET Enterprise Server

    8

    16

    Windows .NET Datacenter Server

    32

    32

     

    Novell Version

    Maximum Processor Limit

    NetWare6.0 with Support Pack1

    32

    NetWare5.1 future support pending.

    n/a

     

    Linux version

    Maximum Physical Processor Limit

    Redhat 7.2

    32

    RedHat7.3

    32

    Redhat 8.0

    32

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