Help with understanding RAM speed!

[iconoclast]

Hi All,

 

I need some help/ real-world experience in regards to RAM speed and latency. I have read a lot of random things online and not found cohesive info that I can apply to my situation. Plenty in isolation, but never voltage and CAS togather...

 

I am building SolidWorks workstations on Z97, 4970k... The mem voltage on that cpu is 1.575V... We have been using G Skill Ripjaws Z 32GB 2400 on our 4770k, but now that I'm building the new systems, I want to avoid waste/ efficiency problems.

 

Im confused about the different variables on mem.

 

-How much will CAS affect performance, ie 2400 CAS 10 vs 1866 CAS 7 or 8... 

 

-Does undervolting negate the mhz advantage of 2400? 

 

I'm Trying to know more than OOOO BIGGER NUMBERS/ and this is BESTISTER!! lol        (a temptation too easy for me to fall into)

 

Thanks!

 

/iconoclast

[8enjicraf2]

https://drive.google.com/file/d/0B5ePJLHhrAUMZFBnc05TLUZMYzg/view?usp=sharing

[xgn]

Run memtest86 from bios you can get some info about ram

you want cas as low as possible to the higher speed the higher cas for most people cas rate matter the most, Unless you are going to do heavy video rendering etc.

Also ram speed matters on processor clocks XMP use to be safe bet.

[comicsansms]

Cas and speed really don't matter in gaming.

[techguru]

Hi All,

 

I need some help/ real-world experience in regards to RAM speed and latency. I have read a lot of random things online and not found cohesive info that I can apply to my situation. Plenty in isolation, but never voltage and CAS togather...

 

I am building SolidWorks workstations on Z97, 4970k... The mem voltage on that cpu is 1.575V... We have been using G Skill Ripjaws Z 32GB 2400 on our 4770k, but now that I'm building the new systems, I want to avoid waste/ efficiency problems.

 

Im confused about the different variables on mem.

 

-How much will CAS affect performance, ie 2400 CAS 10 vs 1866 CAS 7 or 8... 

 

-Does undervolting negate the mhz advantage of 2400? 

 

I'm Trying to know more than OOOO BIGGER NUMBERS/ and this is BESTISTER!! lol        (a temptation too easy for me to fall into)

 

Thanks!

 

/iconoclast

for solidworks...ram speed might help a bit

probably not a absolute ton tho

having alot of ram is more important for this

[iconoclast]

https://drive.google.com/file/d/0B5ePJLHhrAUMZFBnc05TLUZMYzg/view?usp=sharing

Thanks for this!

[xgn]

Cas and speed really don't matter in gaming.

 Ok so CAS doesn’t matter ? So that must be why so many use

Corsair dominator platinum in new builds maybe you know better than them <_<

[iconoclast]

And thanks all for the quick responses. 

 

These will be professional only rigs, no gaming, long life and reliability a must,. SolidWorks is a mem hog (especially loading large assemblies) and is primarily single thread. So I want to do the best i can mem wise... 

 

thanks again!

[iconoclast]

https://drive.google.com/file/d/0B5ePJLHhrAUMZFBnc05TLUZMYzg/view?usp=sharing

@8enjicraf2

 

wondering how best to read the numbers in the yellow, lower better or higher better? Might be silly, but I'm not sure what im seeing:P

[8enjicraf2]

@8enjicraf2

 

wondering how best to read the numbers in the yellow, lower better or higher better? Might be silly, but I'm not sure what im seeing:P

I'm not sure what the yellow is for, I didn't make it (ThioJoe from Youtube did, go sub IMO) just find your speed, then find your timings, eg; Mine is 1600Mhz and 11 CAS = 15. Thats my score, higher is better

[iconoclast]

Thanks!

[iconoclast]

Lol a lot of his videos are hilarious bull:P does he have legit advice too?

 

Edit: found his tech channel.

 

The yellow is the current fastest DDR4 available at the the posting if the vid. The numbers are respose time in nano seconds (ns), and lower is better, generally (needs to somewhat match your cpu's cycle, or one will end up Idle). Thanks again!

 

/iconoclast

[agent_x007]

https://drive.google.com/file/d/0B5ePJLHhrAUMZFBnc05TLUZMYzg/view?usp=sharing

@up My RAM doesn't exist : LINK (1600MHz CL6) 

It's too fast for it's own good : ~7,26ns  B)

[Nena Trinity]

I made a guide!  Ram guide? http://linustechtips...r3-ram-guide-3/ (Updated: 25-Okt-2015)