Got a new CPU, is my RAM Fast enough?

[Wolfmann Mike]

I have 1333MHz RAM now (2x8GB) = Total 16.

I only had a CoffeeLake i3 (quad Core) @ 3.6Ghz,

Just got an i7 9700 that says it runs on 2666 MHz RAM.. So do i need new RAM right away @ 2666, or will 1333 MHz still run the CPU safely?

Thanks for any informed facts you can provide !

[Autumn_]

The 2666Mhz is effective clock of your RAM. 1333Mhz is the actual clock.

So you're running at the rated speed.

Edit; improved wording

[r.linder]

Originally posted by Autumn_:

The 2666Mhz is effective clock of your RAM. 1333Mhz is the actual clock.

So you're running at the rated speed.

Edit; improved wording

This.

RAM is double data rate, which is why it's called DDR. So, 1333MHz as sensors often read it is only half the actual effective speed.
So as Autumn stated, you're using DDR4-2666 RAM.

[Wolfmann Mike]

Thank you. I found a great deal on newegg for 2666MHz G.Skill Aegis 32GB (2x16GB) for basically the price of one 16GB stick...

So i upgraded with the neweg rating of 2666 and now soon i will install 32GB instead of 16.

Good information, i assume newegg's rating is Effective clock, then? if so, 2666x2 is 5332MHz . Will run Games and heavy apps like Blender better.

[Illusion of Progress]

Originally posted by BatSpit:

Thank you. I found a great deal on newegg for 2666MHz G.Skill Aegis 32GB (2x16GB) for basically the price of one 16GB stick...

So i upgraded with the neweg rating of 2666 and now soon i will install 32GB instead of 16.

Good information, i assume newegg's rating is Effective clock, then? if so, 2666x2 is 5332MHz . Will run Games and heavy apps like Blender better.

That is most likely wrong; the RAM you purchased is likely the same speed RAM you already had. DDR RAM is typically advertised in its DDR effective speed rather than the actual clock rate.

Additionally, even IF you had 1333 MHz RAM (which would be 667 MHz real speed), it'd still probably work; just it'd be slow. But 667 MHz (1333 MHz DDR) was DDR2 speeds so it's rather impossible you have that with a Coffee Lake system, which uses DDR4.

[Bad 💀 Motha]

BIOS will state the doubled speed.
Apps like Speccy, CPU-Z and many others will show the single rate speed; which is half.
1333Mhz in CPUZ = the RAM is running properly @ 2666Mhz

Honestly for that CPU you should be using a Z370 or Z390 motherboard with updated BIOS and RAM that is 3200 or 3600. Anything less is pretty much rubbish.

2666 is just the default rated speed for CPUs such as Intel 8th gen, 9th gen, as well as AMD Ryzen. If you motherboard supports higher speed RAM, use that, it will help. However, the CAS timings play a much bigger role, so look into that and see what is good. DDR4 3200 should be CAS 14 or 16, any higher CAS for this RAM Speed will be slower overall.

[Wolfmann Mike]

Ram in CPU-Z is rated @2132 (1066) so it's Direct Drive RAM NOT doulble data rate.DRR4, for CoffeLake.

the 2666MHz RAM i purahes will likely run @ 1333 as i once thought the 1333MHz already ran at, But it rates the Timings Frequency of 1333MHz@ 1066MHz.

[_I_]

post a cpuz validation link
http://www.cpuid.com/softwares/cpu-z.html
cpuz -> validate button -> submit button
it will open a browser, copy the url (address) and paste it here

[Wolfmann Mike]

I'm not that concerned about being 100% accurate. When choosing basic parts ... The 2666DDR4 is what the specs for the new CPU should have installed.

[_I_]

if its a new build, go with a faster cpu and faster ram

9700k should be using atleast ddr 3000 ()1500mhz) with cl15 or lower

[🆂🆃🅸🅶🅶🅰]

well this all a bit to complicated for me now good information but totally confusing , why not just put a hyper link to the Ram he needs , because i need to get some for a PC ,

[_I_]

https://pcpartpicker.com/products/memory/#L=30,150&S=3000,5100&Z=16384002&sort=price&page=1

[Illusion of Progress]

Originally posted by BatSpit:

Ram in CPU-Z is rated @2132 (1066) so it's Direct Drive RAM NOT doulble data rate.DRR4, for CoffeLake.

the 2666MHz RAM i purahes will likely run @ 1333 as i once thought the 1333MHz already ran at, But it rates the Timings Frequency of 1333MHz@ 1066MHz.

Direct Drive RAM? DDR stands for double data rate, and all DDR (DDR1 through DDR4) is like this. It's DDR-SDRAM, meaning it's SDRAM that sends data at both the rising and falling edge of a clock signal, or twice per clock, rather than just once, hence the effective double data rate. So there's the literal clock generator speed, and then the "effective" speed due to doing twice the work in one clock cycle.

Most RAM will be advertised in its DDR speed, but some things will show the actual clock speed. This discrepancy confuses some people.

[Der tüddelige Fußgänger]

well 2,6 ghz ram is ok i guess, but you should really upgrade your ram if possible.
Something like 3,2 or 3,6 ghz.

[r.linder]

Originally posted by your average stock demo main:

well 2,6 ghz ram is ok i guess, but you should really upgrade your ram if possible.
Something like 3,2 or 3,6 ghz.

Unless he has a Z370/390 motherboard, going up from 2666 will do nothing because the locked boards cap at 2666.

[Der tüddelige Fußgänger]

Originally posted by Escorve:

Originally posted by your average stock demo main:

well 2,6 ghz ram is ok i guess, but you should really upgrade your ram if possible.
Something like 3,2 or 3,6 ghz.

Unless he has a Z370/390 motherboard, going up from 2666 will do nothing because the locked boards cap at 2666.

tbh i don't know much about mainboards.
But i think that would be a lot of trouble changing the entire mainboard just for faster ram.