3 Replies Latest reply on Aug 11, 2011 10:48 AM by Adolfo_Intel

    Pentium D stability issues, "MSR comparison" fails in BITS




      I have a Foxconn motherboard based on the SiS 661FX chipset.


      It worked for several years with no problems, with a Pentium 4 3 GHz CPU (1024 MB cache, 200 MHz FSB).


      Now I purchased (used of course) and installed a Pentium D 915 - 2.8 GHz, 2x2048 MB cache, 200 MHz FSB. As the FSB remains the same I did not expect problems.


      But the system became unstable. I use Debian Linux (squeeze) and once in a few hours I get a hang, or (less often) an X server segfault and restart.


      The CPU is kept cool enough by a Zalman cooler with heat pipes on max revs; besides, it usually crashes wihout any particular load. So I'm not overheating it. And the RAM can not be stressed as the FSB has not changed, right?


      I got the BITS utility from Intel - http://downloadcenter.intel.com/Detail_Desc.aspx?ProductID=483&DwnldID=19763⟨=eng&iid=dc_rss . And in the "MSR comparison text", it shows that four MSRs are not the same for the two "CPUs" (cores). The MSRs are 0x2a, 0x198, 0x19f, 0x26f .


      Can this be the cause of stability issues? And if yes, is there a way to resolve it, other than getting the motherboard manufacturer to fix the BIOS?


      (Another suspicion is overheating of the north bridge - although the north bridge should not be loaded more than before? but then there is more heat dissipated in the case).