https://community.intel.com/t5/Mobile-and-Desktop-Processors/Question-about-a-good-old-one-Pentium-4/m-p/392385#M15785 <P>I would suggest running the Intel® Processor Identification Utility to determine if your processor supports Enhance Intel SpeedStep® Technology, if it does, then make sure to disable it from the BIOS, since this feature forces the processor to run slower in order to save power consumption.</P><P>If the processor does not support Enhance Intel SpeedStep® Technology, then I would suggest contacting the motherboard manufacturer to make sure the processor is listed as compatible with your particular motherboard.</P> Mon, 19 Dec 2011 20:17:58 GMT Adolfo_S_Intel2 2011-12-19T20:17:58Z https://community.intel.com/t5/Mobile-and-Desktop-Processors/Question-about-a-good-old-one-Pentium-4/m-p/392384#M15784 <P>Hi there, Friends in the wild wild world,</P><P></P><P>I have this question that I really can not answer for my self.</P><P></P><P>I use an old Pentium based system as a temp back-up for my docs...It's a Celeron 2,6 Ghz on an Aopen MX4GER motherboard...</P><P>It used to run perfectly...for years.....</P><P>Then I got the idea to upgrade this oldy 'cause some-one gave me a P4 2,8 Ghz...</P><P>I checked with Aopen if there were problems to be expected when using a P4 on this mobo....They said no !!!</P><P>So I started to upgrade.....All went well...no probs.....</P><P>After check and re-check I turned on my pc......it began to start......</P><P></P><P>But then I saw that the BIOS recognized the procosseor's brand correctly : a P4 , 2,8 Ghz and Hyper Threading enabled...</P><P>but it was functioning only as a P4 at 1,8 Ghz...( 133 x 14 )....</P><P>Heu ?</P><P>The mobo is Jumperless so the P4 should configure it self at the right speed.....but no....</P><P>Intel's testing software confirms the CPU's brand ( P4 2,8 Ghz ) but reports the actual speed as 1,8 Ghz...</P><P></P><P>I tried everything......even updating the BIOS.....but the CPU keeps on running on 133 x 14...</P><P>The CPU ratio is not to be changed...</P><P>When I change the CPU bus speed in the BIOS to 150...it works....but changing it too 200 ( and then running at 2,8Ghz )...the machine simply won't start...</P><P></P><P>How can this be ...?</P><P></P><P>Dear Friends, is there any-one in the wild world with knowledge about this problem ?</P><P>Then, please, help me out.....</P> Mon, 19 Dec 2011 19:30:39 GMT https://community.intel.com/t5/Mobile-and-Desktop-Processors/Question-about-a-good-old-one-Pentium-4/m-p/392384#M15784 idata 2011-12-19T19:30:39Z https://community.intel.com/t5/Mobile-and-Desktop-Processors/Question-about-a-good-old-one-Pentium-4/m-p/392385#M15785 <P>I would suggest running the Intel® Processor Identification Utility to determine if your processor supports Enhance Intel SpeedStep® Technology, if it does, then make sure to disable it from the BIOS, since this feature forces the processor to run slower in order to save power consumption.</P><P>If the processor does not support Enhance Intel SpeedStep® Technology, then I would suggest contacting the motherboard manufacturer to make sure the processor is listed as compatible with your particular motherboard.</P> Mon, 19 Dec 2011 20:17:58 GMT https://community.intel.com/t5/Mobile-and-Desktop-Processors/Question-about-a-good-old-one-Pentium-4/m-p/392385#M15785 Adolfo_S_Intel2 2011-12-19T20:17:58Z