Intel e8400 clock problem Tags: CPUs Motherboards Intel Last response: November 1, 2009 4:33 PM in CPUs Share Basileus November 1, 2009 3:12:57 PM My CPU is Intel e8400 @ 3.0 Ghz and my motherboard is Gigabyte 965P-S3 My problem is that all the diagnostic tools I have used have shown me that my CPU was running at 2,4 Ghz instead of 3.0 Ghz. I have never tried to overclock my CPU so I don't know what's going on with it. Can anybody help me? More about : intel e8400 clock problem Upendra09 a b à CPUs a b V Motherboard November 1, 2009 3:17:19 PM 965 is not a good chipset what diagnostic tools? CPU-Z the underclock is probably because ur keeping the CPU still if u move a window really fast or start a task it will go back to 3 ghz\ this is normal, it is called speedstep, it is for conserving power, ther is noting wrong with ur processor m 0 l hunter315 a c 190 à CPUs a b V Motherboard November 1, 2009 3:18:40 PM Your motherboard only supports a 1066MHz FSB, the e8400 requires a 1333MHz FSB to run at 3GHz. You can either OC your FSB, or get a newer motherboard which supports 1333MHz FSB CPUs. m 0 l Related resources Intel Core 2 Duo e8400 to i5 2500k "Problem" - Forum Intel core2duo E8400 temp problem - Forum Intel E8400 + Asus P5N32 = Problem - Forum Intel E8400 + Gigabyte X48-DS5 problems - Forum intel core 2 duo E8400 Bottlenecking - Forum Can't find your answer ? Ask ! Get the answer Basileus November 1, 2009 3:19:39 PM I've used CPU-Z, CPU Speed.... The problem is also shown in the properties of my computer in Windows 7. m 0 l Basileus November 1, 2009 3:31:01 PM But sometimes it shows my CPU is running at 3.0 Ghz. It's like a lottery - sometimes it's working properly and sometimes not. m 0 l Upendra09 a b à CPUs a b V Motherboard November 1, 2009 3:36:55 PM the proc automatically down clocks if the FSB is lower on the mobo, and like i said it is because the proc has speedstep, it will be lower if u don't do anything while testing it. m 0 l Mousemonkey a b à CPUs a b V Motherboard November 1, 2009 3:46:32 PM Posting a screenshot of CPUz may help people to point you in the right direction because if your board is a revision 3.3 it can support 1333 FSB but a rev 1.0 might not. m 0 l Basileus November 1, 2009 3:57:15 PM - here's my CPU-z result. I also turned the E.I.S.T. down at BIOS - I didn't helped. m 0 l Mousemonkey a b à CPUs a b V Motherboard November 1, 2009 4:00:31 PM How about one showing the CPU tab. C1E has to be disabled as well. m 0 l Basileus November 1, 2009 4:05:34 PM - here it comes m 0 l Mousemonkey a b à CPUs a b V Motherboard November 1, 2009 4:11:22 PM Basileus said:http://img256.imageshack.us/img256/6230/cpu2o.jpg - here it comes What you have there is a rev 1.0 board not a rev 3.3, so even though you have the latest BIOS (F14a) your FSB is still at 1066. If you cannot manually overclock it to 1333 your CPU will never run at it's correct speed regardless of Speedstep. m 0 l Basileus November 1, 2009 4:12:45 PM Ok, so how can I do it manually? But I remember my CPU running at 3.0 ... m 0 l Mousemonkey a b à CPUs a b V Motherboard November 1, 2009 4:21:32 PM Basileus said:Ok, so how can I do it manually? But I remember my CPU running at 3.0 ... In BIOS > MB Intelligent Tweaker(M.I.T.) > CPU Host Frequency (Mhz) > If you use a 1333 MHz FSB processor, set "CPU Host Frequency" to 333 MHz Source m 0 l Basileus November 1, 2009 4:29:43 PM Ok. And the strangest thing - I've turned the power supply off for a while, and then I've turned it on. And it seems that the problem is solved. - as You can see....... m 0 l Mousemonkey a b à CPUs a b V Motherboard November 1, 2009 4:33:55 PM Bonus!!, it could just be a buggy BIOS/CMOS issue. You could re flash the BIOS and do a CMOS reset it you wish but I would change the mobo battery first. m 0 l Can't find your answer ? Ask ! Publish Related resources SolvedIntel i7-4770K would you over clock immediately? Forum SolvedIntel 4670k Overclocking: Base Clock Frequency or Multiplier? Forum Solvedup gradeing dell precision 390 with intel e8400 Forum Solvedplease tell me how to over clock my laptop which has intel core i3??! Forum SolvedSTUCK at 0.75GHz clock speed HELP!!!! intel i7 4770k Forum SolvedCan the DELL Optiplex XE (E8400 intel core2duo) take 16GB RAM Forum SolvedIs this a problem? - GTX 660 Higher clock than Factory when gaming Forum SolvedOld E8400 Problem Forum SolvedE8400 Problem switcches down high temp Forum SolvedIntel Core i5-4670K having serious clock speed issues in 3D Mark 11 and in games! Forum Solvedcan you over clock Intel Xeon or Intel Core i7-4960X Forum SolvedIntel® Core™2 Duo Processor E8400 GAMING? Forum SolvedCPU Usage spikes down to 0% during stress testing (Intel Core 2 Duo E8400 3.00GHz OC) Forum SolvedMemory Clock Speed Problems ( AMD RADEON HD 7770 ) Forum Solved7970 Clock Speed Problem Forum More resources Read discussions in other CPUs categories AMD Intel Intel i5 Intel i7 Phenom Cooling Performance !