I just built a new PC with a 3.5 GHz 4770K and an MSI G45 Gaming motherboard. I decided to try OCing for the first time today, and while it allows me to adjust the base clock setting it does not allow me to change the multiplier. The description in the BIOS says that it will only work if the CPU supports it, but I thought that mine did since it's the unlocked version. I'm only able to reach 4 GHz by changing the base clock, and if I turn the OC genie mode on it will only hit 4 GHz. Does my motherboard not support this, is my CPU messed up, or am I just an idiot? Thanks.
Don't change the base clock.
I'm pretty sure the System RAM and the CPU share the same base clock so if you increase that for the CPU you're overclocking the RAM.
Does your motherboard support overclocking?
*If your multiplier is locked, perhaps you haven't changed to "MANUAL" mode. I believe on my Asus motherboard there's a choice between:
So, click "XMP" first to go back to default CPU and RAM settings, then click "MANUAL" and change the multiplier to "41" for all four cores (assuming 100MHz base clock).
If that works, reboot and test with Prime95. Also verify the RAM frequency is correct and test with MEMTEST ( www.memtest.org )or the Windows MEMORY diagnostic utility.
Most motherboards have a "quick overclock" button of some kind as well as Windows software that you can install to do this for you.
I haven't changed the base clock since I saw it changing the RAM clock as well. I will go take a SS of the settings now. Basically it says that it's on auto and it can be changed if the CPU supports it.