Ram Timings ?

hololand · Dec 20, 2016

So i recently settled for TridentZ 32GB kit 3200Mhz, My question is regarding timings. As far as I am aware the timings are superior to competitors. But how much does that matter?

How big would the performance difference be between

32GB 3200Mhz - 16-18-18-38

32GB 3200Mhz - 14-14-14-34

(bearing in mind that I do a lot of 3D and video editing and rendering and play Arma 3 primarily)

azaran · Dec 20, 2016

Well in terms of actual timings, those RAM sticks would work out with the following latency speeds.
32GB 3200Mhz - 16-18-18-38 = 10 Nanoseconds
vs
32GB 3200Mhz - 14-14-14-34 = 8.75 Nanoseconds

Now if you're doing a lot of long rendering sessions, that may add up to a bit of saved time. But if you're not doing it on a pro level or not doing long enough renders for the 1.25NS difference to show itself, then just go with whats cheaper and easier to use.

gaborbarla · Dec 20, 2016

hololand :

The difference is quite minimal and not worth it in my opinion. Both those RAMs run at a high Megahertz, which is the main thing. 16 to 14 timing is the most important number for example is a 12.5% improvement in speed but only for that specific timing while the other 2 are worse than 12.5% improvement. To put this into perspective, if you go from 1600Mhz to 2400Mhz in general you don't get a proportional increase in performance. Even in ARMA3 which is quite memory bandwidth bound you will have minimal improvement over the already fast DDR4 3200Mhz setup. I doubt you will get more than 1-2% improvement if that. In graphics design where you copy stuff a lot in memory you will still never see the 12.5% full improvement as other factors also come into play and memory is not the only bottleneck.

The rule of thumb for RAM for me is: If you can get performance RAM for cheap do it. If it's significantly more then don't. Rather spend the money on a better graphics card or CPU.

There are other discussions that are perhaps good to browse through also:
https://www.reddit.com/r/buildapc/comments/5jcefr/does_ram_timing_matter_or_just_speed/
http://www.tomshardware.com/forum/287557-30-what-timing

Gabor

hololand · Dec 20, 2016

gaborbarla :

hololand :

The difference is quite minimal and not worth it in my opinion. Both those RAMs run at a high Megahertz, which is the main thing. 16 to 14 timing is the most important number for example is a 12.5% improvement in speed but only for that specific timing while the other 2 are worse than 12.5% improvement. To put this into perspective, if you go from 1600Mhz to 2400Mhz in general you don't get a proportional increase in performance. Even in ARMA3 which is quite memory bandwidth bound you will have minimal improvement over the already fast DDR4 3200Mhz setup. I doubt you will get more than 1-2% improvement if that. In graphics design where you copy stuff a lot in memory you will still never see the 12.5% full improvement as other factors also come into play and memory is not the only bottleneck.

The rule of thumb for RAM for me is: If you can get performance RAM for cheap do it. If it's significantly more then don't. Rather spend the money on a better graphics card or CPU.

There are other discussions that are perhaps good to browse through also:
https://www.reddit.com/r/buildapc/comments/5jcefr/does_ram_timing_matter_or_just_speed/
http://www.tomshardware.com/forum/287557-30-what-timing

Gabor

Thanks for the fast reply, And the fact that you noted Arma as a memory bandwidth intensive game drastically ups the credibility of the reply (at least in my eyes). Is there any new ram technology or faster ram coming on the horizon that I should consider at all before making a purchase?

hololand · Dec 20, 2016

azaran :

Ah, I see. So nothing really significant then. Putting this into reality. If i were do render a 10 minute long 4k video. What performance increase might I see from one to the other?

hololand · Dec 21, 2016

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