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Asus B660M-Plus

So, I have to admit to not having done my research very well and bought a K processor with a B660M motherboard - however its an Asus B660M-Plus D4 and it does have a load of menu options for overclocking, it just won't let me enter values above stock, e.g. the most I can enter for P-core mulitplier is 49, but it will let me set all cores to 49 / 6cores to 49, but then when I boot in to windows and run a CPU intensive task, it just sits there at 4.5. Similarly the ecores I can set to 40 all core but in use the max it goes to is 34 all core.

Ring / cache I can set to e.g. 43 and it does OC to that in windows. VCore adjustments also take hold.

So I'm a bit confused by the Asus bios as it appears to offer somewhat limited OC options, but they don't seem to stick in windows.

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There is no CPU overclocking on B660. You can enter a higher multiplier like 49 in BIOS, but it will not override the stock behaviour.

(Technically there are 1-2 B660 boards which support BCLK overclocking, but that is a niche feature, only for non-K CPU's)

I would recommend returning the B660 board and getting a cheap Z690 board.

https://pcpartpicker.com/product/nGRYcf/msi-pro-z690-p-ddr4-atx-lga1700-motherboard-pro-z690-p-ddr4

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Can't return it as it's already all set up, but my daughter is also due an upgrade so might foist a non K CPU on her and buy myself a new board lol

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So if I buy a processor outside the K series, will the B660 M PLUS D4 give me the option to change that settings?

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Nope, B boards don't support overclocking

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