CPU Slow After Overclock?

i dont know about pc slows down... but i think i also experiences this. when i underclock my cpu after overclock, my pc slows down and running at full usage. but, after a shutdown / few restart, i gained normal speed.

i think that the windows are not sync the cpu speed after changes of cpu speed at first. it just likw when you oc for the fist time, you will feel boost speedup and almost never at full speed but after few restart, the pc slows down to 'normal speed' to sync the speed. but after underclock, the pc lost sync and cause this slowness. maybe a few restart will make it better.

maybe what am i saying is true according to my theory. remember THEORY

try clearing cmos

Overclocking threw bios will prevent this.

So wait, what should I do? Clear cmos and what else?
Also, this has been happening for like a month.

Forgot to say that I did overclock through bios.

well, if it slow down, that's mean that your overclock setting not 100% stable..

have you tried with any stressing software..?

the other reason why it's slowdown is your motherboard vrm limit..

if you tell us about model and type of your motherboard, it will help..

Did you run prime 95 to test for stability?

Okay. I overclocked it through bios but now I have it at default for over a month; still the same lag.

No, I have not tried any stress software.

My motherboard is asrock n68c-gs fx

okay..

for more details..
what kind of "lag" did you experience..?
i mean
mouse lag..or somethin else..?

What is your psu brand ..?

I think it might be my computer not having enough PSU wattage. I have a case fan, aftermarket cpu fan, ATI Radeon HD 6750, AMD 955 @ 3.2 Ghz, Regular HDD, And modem pci card.

My PSU is CoolerMaster 460W. The lag I'm getting is fps lag and nothing else.

coolermaster 460 known as a "crap" psu..
Fake wattage label, huge ripple and horrible rail..

yes, this psu will damage your system, but i dont think that your fps lag came from this part..

but i don't really get what is the meaning from your fps lag..

is it sometimes you get fast fps, and sometimes slow..?

if yes, try this..

enter bios and disable your Cool 'n Quite feature (Powernow for biostar) ..

and disable C1E too..

Goodluck.

Fps lag as in I have 60 fps all game and all of a sudden it drops to 10 fps for a couple of times. All games for me do it. Racing, mmorpg, or fps games.

Did you already had disable Cool'n'Quite and C1E feature in your bios?

Will do it soon. I'll get back to you.

Disabled anything to make my CPU quieter and still the same.

okay...
have you already reset your bios to the factory condition..?
and
what is your VGA..?

try to replace your psu, maybe your system is underpowered, bad voltage and low wattage delivered from your psu to your system can cause lagging experience too..

I reset CMOS and my VGA is ATI Radeon 6750.

Such a mystery... 

Well...
even coolermaster 460 known as a "crap" psu, it will enough to serve your machine..

try to reseat your gpu...
Remeber to watch the gpu temperature..
What temperature of your GPU in gaming mode..?

*AMD card with throttle back to the lowest speed if it too hot...

if your gpu temp is more than 80'c in gaming mode, than your gpu is the problem..
try to reseat it, clean heatsink from dust, the re-apply thermal paste will solve your problem..

And for the last, try to swap your psu with others, maybe you can borrow your friend's psu, and see..is it solve your problem or not..

GPU is around 32 C on idle and 40-45 C on load.
My thermal paste was reapplied around this summer (2-4 months ago) and the thermal paste was already on the new Heatsink I purchased.

If you put new paste on the cpu, and you didn't take off the paste from the cooler the problem could be too much paste.