DDR4 RAM speeds, performance and Skylake compatibility

Markharwester

Honorable
Jun 20, 2015
16
0
10,510
Hey everyone!

I am looking forward to buy an i5 6500 (non-k) for gaming purposes. I did my research concerning the RAM, and i found that this cpu supports up to 64gb of 2133 mhz ram.

Despite this, everywhere i look i find people with completed builds, using this exact same cpu, but with higher speed ram, like 2666 mhz or even higher.
I know that this is not a problem, as the ram will just downgrade itself to match the supported speed, but why do people buy faster ram then?
I also read that faster ram DOES mean more fps in certain cpu heavy programs (like GTA V), and this is where i am confused:

I could actually afford faster RAM, but wouldnt it slow down, because the CPU supports 2133 mhz only? How does this work?

As always, thank you for your help!
Mark
 
Solution
There are a few reasons I can think of:
1- BCLK overclocking
2- tighter timings when taking a higher speed DIMM and running it at a lower frequency (ex.: 2666-14-14-14 --> 2133-11-11-11)
3- same or similar price
4- availability
5- cosmetic reasons

InvalidError

Titan
Moderator
There are a few reasons I can think of:
1- BCLK overclocking
2- tighter timings when taking a higher speed DIMM and running it at a lower frequency (ex.: 2666-14-14-14 --> 2133-11-11-11)
3- same or similar price
4- availability
5- cosmetic reasons
 
Solution
Why do people buy RAM that's faster than the CPU officially supports? Because you can make the RAM go faster than that. All you have to do is change a setting or two in the BIOS.

I have DDR4-3000 in my 6600K Skylake system and it runs at 3200, because I changed the memory settings. And yes, faster memory will give better performance. Sometimes you will notice it, sometimes you won't -- it depends on what program/game you are running.
 

Tradesman1

Legenda in Aeternum
Most 6500s should be able to carry 2400 or even 2666, some can carry even higher - it all depends on the individual 6500 you get - that said, 64GB can be a load - I'd prob go 2400 or 2666 as tops - might need some voltage adjustments - if any problems - give a holler ;)
 

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