Only 3 cores showed up in my Quad Core Q8200 Processor Tags: CPUs Quad Core Processors Last response: November 16, 2010 3:02 PM in CPUs Share PatelTiLAK November 16, 2010 9:01:27 AM When i bought new processor, it was showing all 4 cores of CPU in Q8200. But dont know since when, but now its showing only 3 cores since 1-2 months. Core#0 Core#2 Core#3 Core#1 has disappeared. I checked it by many utilities, bt all showing same including Device Manager. Windows and Linux too. Performance is also affected. My core temperatures remains high like 65-68 at idle time and at peak load, it reaches upto 80 C So that core disappeared due to heating Problem?? IS it possible that CPU/MainBoard itself had disabled/locked it due to overheating ? If yes then how to re-enable it OR it is fried up and i can never get it working again?? Can anybody help me out... Other specs: Intel DG31PR MainBoard 4 GB DDR2 RAM (2+2) Latest BIOS Updated Win 7 x64 Ultimate Thanks More about : cores showed quad core q8200 processor PatelTiLAK November 16, 2010 10:24:25 AM I found the Problem that disabled it. And so the solution also It was due to BIOS settings. In BIOS settings-> SW Single Processor Mode was Enabled. SO cores were disabled and it worked as single CPU Now after i disabled it, it now shows all 4 cores. Windows rating is also 7.1 now Thanks for reply. PatelTiLAK November 16, 2010 3:02:36 PM Temprature already remains high. Core temprature reaches 70 C frequently and when i play game, it reaches >80 C At 0% CPU usage, it remains 65-68 C. Now if i overclock it, then core will definitely BURN OUT. Can't find your answer ? Ask ! Publish Related resources: ForumPlease suggest a mobo for my Core2Quad Q8200 ForumPhenom II X4 925 vs Intel Core 2 Quad Q8200 ForumDoes the core2quad q8200 2,33ghz still cut it ForumQuad core processor shows only 2 cores in device manager ForumCore 2 quad q8200 with 2 cores detected at PCUz ForumAn overclocking problem with the Intel Core 2 Quad Q8200 processor ForumGuys pls help...intel core 2 quad Q8200 ForumCore 2 Quad Q8200 , w/EP45-UD 3 P mb,best settings ForumIntel Q8200 quad core or Amd Phenom 2 550 black ForumOC'ing Intel Core 2 Quad Q8200 2.33GHz - Newbie in action! ForumIntel Core 2 Quad : Q6600 vs Q8200 - Which is better? ForumWindows XP and Quad Core Processors ForumI 3 540 or a q8200 ForumOverclock Core 2 Quad on Nvidia 7xxi Motherboard ForumPSU Help ForumCore i3 530 vs Athlon II x4 640? ForumX2 555 help finding all 4 cores in bios ForumWill unlocking cores up watts and damage board? ForumProblems with my unlocked AMD Phenom ii x4 B50 Processor ForumWhich Processor Should I Buy: Midlevel Gaming More resources Read discussions in other CPUs categories AMD Intel Intel i5 Intel i7 Phenom Cooling Performance !