Question CALCULATE the DDR4 "MHZ" speed of new RAM/Memory?

[weatherphobia]

There was or I guess I was just dreaming?

There used to be a FORMULA where you could calculate the 'needed' or 'optimal' memory speed in MHz and it was based on the Motherboard or CPU or it was BOTH?

Does anyone know what I am talking about here?🍆👌👳‍♂️

 

[Math Geek]

how long ago do you think is from?

i don't recall any such formula but the only thing i can imagine it being related to was back when the memory controller was on the north bridge and not on the cpu itself. keeping the ram synced with the cpu was important to keep it optimized. it's possible there was something you saw in an article somewhere to make sure the ram speed was synced with the cpu speed.

i remember overclocking back then with base clock and having to be sure the ram also ran at that same base clock to keep it all happy.

i don't think it would be relatable now though with the controllers being in the same place. considering most overclocking is now done with the multiplier, there is little reason for stuff to be out of sync anymore.

or i could just be remembering wrong as well and am completely out of left field here.

 

[weatherphobia]

how long ago do you think is from?

i don't recall any such formula but the only thing i can imagine it being related to was back when the memory controller was on the north bridge and not on the cpu itself. keeping the ram synced with the cpu was important to keep it optimized. it's possible there was something you saw in an article somewhere to make sure the ram speed was synced with the cpu speed.

i remember overclocking back then with base clock and having to be sure the ram also ran at that same base clock to keep it all happy.

i don't think it would be relatable now though with the controllers being in the same place. considering most overclocking is now done with the multiplier, there is little reason for stuff to be out of sync anymore.

or i could just be remembering wrong as well and am completely out of left field here.

Then you'd agree using 2933, 2666 MHz ram which is cheaper is fine and no need to spend extra money on 3000-3200 MHz Ram sticks?

 

[USAFRet]

Then you'd agree using 2933, 2666 MHz ram which is cheaper is fine and no need to spend extra money on 3000-3200 MHz Ram sticks?

This depends a lot on the rest of the system, CPU in particular.
A Ryzen CPU thrives on faster RAM. 3000MHz minimum.

 

[Math Geek]

as USAF noted, speed now is more about what performance you want and what the CPU likes mainly.

faster ram does make a small difference in many applications. in my opinion it's not worth $75 for that slight improvement but it is worth an extra $20-25 or so if the price is right. Ryzen likes ram as fast as you can put on the mobo, but intel does not make as bit of a difference.

no real formula really, just need to know rest of the system and purpose of it to help make a decision