CPU memory types

The Torrent · August 3, 2018

Been doing googling and, well, this sums my question up perfectly:

http://www.tomshardware.co.uk/answers/id-2854944/cpu-memory-type.html

but this makes no sence to me, the fastest intel CPU’s memory type goes is 2666 so why do people invest in 3000mhz and above ram speed if it’s not supported and locked down to 2666? And motherboards supporting 4000+, my only idea is is that the answer on tomshardware is incorrect.

PlayStation 2 · August 3, 2018

One potential reason is because it may be cheaper or aesthetics relating to either the color of the RAM stick itself or its heatsink.

Also, motherboards aren't necessarily locked to whatever memory speeds a CPU can support.

Moonzy · August 3, 2018

13 minutes ago, The Torrent said:

the fastest intel CPU’s memory type goes is 2666

officially, intel supports memory up to 2666, just like how they officially support up to 4.2ghz turbo on the 7980XE

but that only means if you cant get anything higher than that, you cant complain to intel for a new chip, because anything beyond that is not guaranteed

the IMC and RAM can both be overclocked to achieve lower latency when accessing data to and from it.

also note that higher freq =/= higher performance

Spoiler

DarkSmith2 · August 4, 2018

1 hour ago, The Torrent said:

Been doing googling and, well, this sums my question up perfectly:

http://www.tomshardware.co.uk/answers/id-2854944/cpu-memory-type.html

but this makes no sence to me, the fastest intel CPU’s memory type goes is 2666 so why do people invest in 3000mhz and above ram speed if it’s not supported and locked down to 2666? And motherboards supporting 4000+, my only idea is is that the answer on tomshardware is incorrect.

yes the answer at toms hardware is wrong. 2666 is just the natively supported memory bandwidth.

The higher you'll go with RAM the higher the performance will be, bandwidth also lowers latency... CL timings are important dependent on cache size of plattform and application support. Its a mix of everything.

But the funny explanation of CL timings and "true latency" in the video hasnt really a meaning to real world performance. Its just an easy way to determinate which XMP profile on kit x vs kit y is faster in theory.

People are saying 3000/3200 ramkits are the price to performance sweetspot. The higher you go the worse is the price, but its always a performance gain until it hits diminishing returns.. Also mind that you just can buy any samsung b-die sticks/kit and will probably be able to atleast hit DDR4-3600 CL16 via manual overclocking with ease.