32 GB DDR4 (4x8GB) for good overclocking?

I'd like to get faster RAM (currently on Corsair Vengeance LPX 3000 2x16GB, overclocked to 3200 MHz with CR1). I'd like to aim for 4000 MHz. I have heard that 16 GB dimms are not a good choice for that, as they are double-rank, which does not perform so well in higher areas. My experience on my M. VIII Hero seems to support this claim (3333 MHz with CR2 is all I can get out of those, with 19-19-19-39 timings).

So I'd like to buy some kit with 4x 8 GB modules at ~3000 MHz stock and overclock to ~4000 MHz. Modules already coming at 4000+ MHz are kind of expensive...

Generally possible? Which ones would you recommend?
Edited by pegnose - 10/26/17 at 5:58am
Ripjaws V:

F4-3200C14D-16GVR 2x8GB DDR4-3200 14-14-14-34 1.35V ja S1
F4-3200C14D-16GVK 2x8GB DDR4-3200 14-14-14-34 1.35V ja
F4-3200C14Q-32GVR 2x8GB DDR4-3200 14-14-14-34 1.35V ja S1
F4-3200C14Q-32GVK 2x8GB DDR4-3200 14-14-14-34 1.35V ja
F4-3600C17D-16GVK 2x8GB DDR4-3600 17-18-18-38 1.35V ja
F4-3600C17Q-32GVK 4x8GB DDR4-3600 17-18-18-38 1.35V ja


Trident Z (original):

F4-3200C14D-16GTZ 2x8GB DDR4-3200 14-14-14-34 1.35V ja S1 / S2
F4-3200C14Q-32GTZ 4x8GB DDR4-3200 14-14-14-34 1.35V ja S1 / S2
F4-3600C15D-16GTZ 2x8GB DDR4-3600 15-15-15-35 1.35V ja T1 / S1
F4-3600C16D-16GTZ 2x8GB DDR4-3600 16-16-16-36 1.35V ja T1 / T2 / T3 / S1 / S2 / S3
F4-3600C17D-16GTZ 2x8GB DDR4-3600 17-18-18-38 1.35V ja S1 / S2 / S3
F4-3600C17Q-32GTZ 4x8GB DDR4-3600 17-18-18-38 1.35V ja S1 / S2 / S3


from:
https://www.hardwareluxx.de/community/f13/die-ultimate-hardwareluxx-samsung-8gb-b-die-liste-alle-hersteller-25-10-17-a-1161530.html

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Thanks, man! Would you say starting at 3200 and aiming for 4000 MHz is ambitious?
I'm aiming for the same thing myself.
Found some used 3200C14 4x8 on amazon.
Guessing 4 modules is not going to give me 4k.
Kinda new to OC:ing rolleyes.gif
Tried just two of them for starters?
Keep me posted! smile.gif
The best for me F4-3600C15D-16GTZ 2x8GB DDR4-3600 15-15-15-35 1,35V et T1 / S1
Overclocked to?

What does T1/S1 mean?

EDIT: Ok, in the original hardwareluxx link above there are screenshots (S) and test (T) linked. Does not have to do with any specs.
Edited by pegnose - 10/30/17 at 3:29am
T1 is usually the command rate (reads every cycle), it provides a performance advantage over T2 (every other cycle) but is much harder to get stable at high clocks.
Correct. But what is S1 then?

In this case T1/S1 is something else, see my above posting.
Are you doing something specific that requires high RAM speeds? Net performance in real world apps over 3200hz can only really be measured with benchmarks and even then the gains are minimal. Get a good set of CL14 3200hz RAM, set it and forget it. I have yet to see any actual program that will show improvements from anything higher than 3200hz outside of esoteric benchmarks.
CPU-bound games are said to benefit.
Originally Posted by pegnose
Thanks, man! Would you say starting at 3200 and aiming for 4000 MHz is ambitious?
4000is way to ambitious. I'd say you'd be looking at 3600 max. 3800 if your luckly and exprience with ram oc.
"G.Skill Trident Z 32GB DDR4-3200 CL14 memory review:

G.Skill offers the overclocker's dream with their Trident Z kit.
The B-die Samsung chips scale exceptionally well with higher
voltages and our best result - 4000 MHz with CL12- is far above
the results we've achieved with other DDR4 kits."

https://uk.hardware.info/reviews/6809/7/gskill-trident-z-32gb-ddr4-3200-cl14-memory-review-made-for-overclockers-conclusion
Originally Posted by Iwamotto Tetsuz
4000is way to ambitious. I'd say you'd be looking at 3600 max. 3800 if your luckly and exprience with ram oc.


I was afraid you'd say that. But I was expecting this.

@pion: There surely is some silicon lottery involved.
Originally Posted by pegnose
I was afraid you'd say that. But I was expecting this.

@pion: There surely is some silicon lottery involved.
I'd love to think silicon lottery in my life, I had never tried getting a golden bin. biggrin.gif
I usually try to get something well performing and solid, not aiming for the ultimate. But if I see ~10 % more FPS in PUBG with faster RAM...

However, I didn't have much luck in the SL, so far. My current 6700k needed 1.44 V for 4.6 GHz. Recently I delidded it and could go down to 1.4. What I may have learned is not to buy "stock" CPUs at a shop offering high-binned delidded ones for high prices. The regular-priced ones are likely just the left-overs.

I also wonder how many people actually return 100% ok components (CPU, RAM) because they are not overclocking so well.
I have heard, and read at several places, though that double-rank memory is generally faster then single-rank, and that double-rank 3200 MHz is comparable to ~3400 MHz single-rank. What do you think about that?
Edited by pegnose - 11/2/17 at 1:35am
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