which is better- c15 or c16 ddr4?

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kdmarcotti

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Feb 9, 2015
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Which is better? I believe the c15/c16 ratings have something to do with latency, but I don't know which I should choose for better overall performance? Thank you for any help here.
 
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MeteorsRaining
C15 or C16 is usually in context with Latency, called CAS (or CL, ie, CAS Latency). Less latency is almost always better, so C15 is better in broadest sense.

But what particular modules are we talking about? Other factors like Voltage and Frequency can affect performance as well.
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MeteorsRaining

MeteorsRaining

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Jul 27, 2014
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C15 or C16 is usually in context with Latency, called CAS (or CL, ie, CAS Latency). Less latency is almost always better, so C15 is better in broadest sense.

But what particular modules are we talking about? Other factors like Voltage and Frequency can affect performance as well.
 
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kdmarcotti

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The 2 specific items in comparing are the new corsair dominator platinum ddr4. I'm doing an x99 build, and I can't choose between the 16gb 3333mhz c16, or the 32gb 3000mhz c15. So its either higher MHz, or its more memory with a better latency rating. Which would be more beneficial to me? My main goal is powering the oculus rift consumer version when its released, I understand some heavy hardware is necessary to have an ideal vr experience. Plus I'm just plain into pc power, the more the better. ..so with all that in mind, which memory is the better option? Still the larger amount of c15 @ 3000mhz?

Its going on an Asus rampage v extreme with an i7 5960x, plus two Asus matrix 980's in sli, and two Intel 730 ssd in raid 0. Psu is corsair ax1500i.
Thanks for the help!
 
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1LiquidPC

1LiquidPC

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Probably going to be similar performance if your able to run them at their XMP settings....all depends on the quality of your IMC in the 5960X. Also, the current DDR4 available is very OC friendly as far as increasing frequency, lowered timings, ect. If your going for an all out power rig, I'd get the 32GB 3000 C15 kit. If your OC'ing at all, you could *possibly* get it closer to the 3333 kit. For stock setting purposes, if both kits were running at rated XMP speeds, it would depend on the software/benchmark being used as to which is faster, some would favor one or the other. But, you can't turn 16GB into 32GB by adjusting settings :)
 
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kdmarcotti

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Thank you both for all the help, I really appreciate it. Looks like 32gb of c15 is the way to go! it was the only part of the build I couldn't figure out, so many options when it comes to memory, its quite mind-boggling lol.. Thanks again!
 
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MeteorsRaining

MeteorsRaining

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Firstly, 16GB to 32GB is a HUGE leap, you must understand what your work demands. The concept of 'bigger the better' will always favour 32GB, but it'd be a sheer waste if you can't utilize it. I'm unsure if Oculus PC version will be able to use up 32GBs of memory. Also, You just can't compare those two memories face to face, one has double the capacity of other.

Also, that PSU is overkill, A 1kW high quality PSU will be more than enough.

 
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1LiquidPC

1LiquidPC

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MeteorsRaining has good points about you most likely wouldn't *need* 32GB, but I figured since you mentioned going all out, why not. Also, not sure how long your going to be using this build, but by looking at the parts your getting, probably want to use it for a good while. Another reason why 16GB is OK today, but what about a few years from now? Also, like mentioned, you definitely don't need the AX1500i for your rig, 1kW is more than plenty for 2 980s and heavy OC of a 5960X.
 
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kdmarcotti

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Feb 9, 2015
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Ya, I know I may not 'need' 32gb at the moment, or the 1500i might be too much, but I'm just power hungry. I'm like Johnny depp in that awful transcendence movie-"I need more power" lol ..seriously though, this build is more about being as excessive as my bank account will allow. I may not 'need' all this power, but I can afford it at the moment, all the parts are compatible, plus I'm having fun! Its not always about what you need, sometimes its fun to just build a beast!

Thanks again for the advice guys!!
 
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shamsul_arefin

shamsul_arefin

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Sir , I am buying a New PC. I have shortlisted two RAMs,
http://www.corsair.com/en-us/vengeance-lpx-8gb-2x4gb-ddr4-dram-2400mhz-c14-memory-kit-black-cmk8gx4m2a2400c14
http://www.corsair.com/en-ca/vengeance-lpx-16gb-2x8gb-ddr4-dram-3200mhz-c16-memory-kit-black-cmk16gx4m2b3200c16
which one is better ? Ive read somewhewre that increasing latency may create decreasing performance. I'm confused.
Can you please state ? how much better will be the later one if it's better
 
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kineticartist

kineticartist

Dec 1, 2018
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I have my Corsair Dominator Platinum C15 3000Mhz 32GB (2x16) running at 3400Mhz on my Asus Maximus Hero XI with a i7 8700K CPU overclocked to 4.9Ghz The RAM memory timings are 15 17 17 35 at 1.35v Northbridge is at 4300Mhz FSB:Dram is 1:34 Im looking to lower those timings to be tighter and or increase the frequency.

This CAN be done, it really depends on your board and the CPU's IMC (intel) but the Corsair Dominator Platinum line according to Corsair is a highly binned set of memory chips from Samsung or Micron (hard to get info on where they source for each line) I could pull apart the heat sink on one dimm but Im no heathen. Suffice it to say get the right board (Asus) dont cheap out on your board get the Dominator and get a dal channel 32GB or a quad channel 64GB kit depending on your funds and overclock them suckas manually XMP2.0 will get you to 3000Mhz rated speed but there is so much headroom on these sticks And any sissy that says no one needs more than 16GB of RAM (in point of fact has more than 16GB of RAM his or herself) maxc your board if you can afford it you will never regret it.
 
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