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 hunter315 a c 158 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. Related resources Intel E8400 + Asus P5N32 = Problem - Forum Overclocking Intel E8400 with Asus P5Q deluxe to 4GHz - Forum Annisman's 5th Giveaway, Intel E8400 3.0Ghz, WINNER ANNOUNCED - Forum Is an intel core 2 duo e8400 cpu good for gaming? - Forum Intel E8400 and the AMD 955 - 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. 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. 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. 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. 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. 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. Basileus November 1, 2009 4:05:34 PM - here it comes 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. 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 ... 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 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....... 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. Can't find your answer ? Ask ! Publish Related resources : ForumIs a asus IPIBL-LB compatible with Intel Core 2 Duo Processor E8400 ? ForumIntel Core 2 Duo E8400 (45nm) OR Intel core 2 quad q6600 ForumIntel E8400 or Q6600 for music production? ForumIntel e8400 + Biostar TPower I45: 5ghz on air? ForumE8400 problem OC ForumIs Core 2 Duo E8400 still a capable gaming processor ForumE8400 performance problem (3dmark06 cpu score: 1618) ForumPOST problem with P45 / E8400 new build ForumIntel Core 2 Duo e8400 to i5 2500k " Problem " ForumIntel core2duo E8400 temp problem Forumproblem with my cpu clock speed ForumThermaltake 850w PCI-E question ForumCpu z showing low low for intel core 2 duo e7400 ie 1600mhz ForumAMD vs. Intel: Refuting Historical Inaccuracies ForumWindows 7 Sound Card Problem? More resources Read discussions in other CPUs categories AMD Intel Intel i5 Intel i7 Phenom Cooling Performance !