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View Full Version : Asus G752VY with World fastest DDR4 upgrade



Jlieu
01-10-2016, 08:51 AM
Its me again, after awhile i decide to upgrade 16GB Kingston DDR4 2400 which is currently world fastest notebook DDR4. Do you guys think worth it compare to stock RAM with 2133?
what can i expect after the upgrade? targeting to swap out stock 16GB 2133 and replace with 16GB kingston hyperx impact 2400.
Worth it or no?

Otot
01-10-2016, 11:15 AM
http://www.heise.de/preisvergleich/g-skill-ripjaws-so-dimm-16gb-f4-2666c18s-16grs-a1352934.html?hloc=at&hloc=de
or this:
http://www.heise.de/preisvergleich/kingston-hyperx-impact-so-dimm-8gb-hx426s15ib-8-a1318899.html?hloc=at&hloc=de
should be the world fastest Notebook RAM. Because DDR4 2666>DDR4 2400. But does the G752 support RAM above DDR4 2133, I don't know.

Greetings :)

Jlieu
01-10-2016, 11:25 AM
I think it should support, previous G751, 750 models DDR3L 2133 runs fine. G752 should do too right? :D

JustinThyme
01-12-2016, 06:44 AM
DDR4 2133 PC1700 is default in the G752VY.
Platform is new so not too many Guinea pigs just yet. Im hanging back to see, already have 32GB of the DDR4 PC1700. When I take the leap it will be with the fastest available and all 4 Slots loaded with a 16GB stick for a 64GB total.

More memory with higher bandwidth is always a good thing. Just have to watch the latency doesn't get out of hand as its a trade off. Doesn't seem that long ago I was building machines with 4 sticks to get a 16GB total and DDR was a new thing with CL of 2. Now you are doing good with the latest to get CL of 16.

Jlieu
01-12-2016, 07:00 AM
Currently kingston hyperx impact 2400 with CL14
Which = 0.0058s responds time.

Default ram with 2133 with CL 15
Which = 0.007s rsspond time.

So i think worth the upgrade. But i still cant find 16gb single module version.

Jlieu
01-12-2016, 07:00 AM
Currently kingston hyperx impact 2400 with CL14
Which = 0.0058s responds time.

Default ram with 2133 with CL 15
Which = 0.007s rsspond time.

So i think worth the upgrade. But i still cant find 16gb single module version.

Otot
01-12-2016, 02:02 PM
What do you mean with
single module version.?
Single rank or one 16GB module?

Jlieu
01-12-2016, 04:34 PM
Single module 16GB.

JustinThyme
01-12-2016, 05:12 PM
I dont believe Kingston has them.
My extensive search has thus-far yielded Gskill ripjaws as the only one making the sticks in the sodimm 260 pin format, non ecc.
They have them all the way up to PC4-22400 or 2800Mhz.....but as stated with the increase in speed the CL drops back to 18

New Egg sells them in single, 2x16 and 4x16 for every flavor.

Im more than sure the actual memory performance will increase with any of these options, question of the day however is what applications other than a memory benchmark will benifit from it? There is always having bragging rights but trading 4 Ben Franklins and then some to be able to say I have 64gb of the fastest laptop memory is an expensive venture, especially when you factor in that within a matter of a few months it wont be the fastest anymore.

As of this moment, save crunching some very intensive algorithm, there is nothing that I can think of that will use the speed or the capacity. Especially when you consider the amount of cache on CPUs now.

Otot
01-12-2016, 08:34 PM
Why don't you get 1x 16GB G.Skill RipJaws DDR4-2666, CL18-18-18-43? I read somewhere that frequency is more important than latency for skylake processors.

Greetings

Korth
01-12-2016, 09:00 PM
Frequency is more important than latency, DDR4 manufacturers have always bumped raw frequencies up and up with little regard for timing penalties.

The GL752VY uses an i7-6700HQ (http://ark.intel.com/products/88967/Intel-Core-i7-6700HQ-Processor-6M-Cache-up-to-3_50-GHz) or i7-6820HK (http://ark.intel.com/products/88969/Intel-Core-i7-6820HK-Processor-8M-Cache-up-to-3_60-GHz) - the iMCs in both of these processors are rated to sustain 34.1GB/s on two channels of DDR4-2133, LPDDR3-1866, or DDR3L-1600.

Faster memory (DDR4-2400/-2666/etc) can be installed in any Skylake system, although it will default to JEDEC DDR4-2133 settings. The DDR4 itself will report any XMP profile(s) stored on its SPD firmware, but they will only work if supported across all system firmware and software - so basically if your BIOS allows the user to change memory voltages/timings then it can support faster DDR4, but if it doesn't allow any user changes then it'll only run the JEDEC defaults native to your processor.

These particular Skylake parts are Intel's lower/mid bins. It may turn out that actual memory bandwidth gains are minimal (or capped around 34.1GB/s) even if do manage to install and configure fully stable DDR4-2400/2666/etc with tight timings and no thermal throttling (because, yeah, any laptop including your mighty ROG laptop has very constrained thermal limits). Opinions differ, but I personally think DDR4-2133 is the right fit for your system and any increased performance from higher-frequency DDR4 will be noticeable only in benchmark brag and swag, not in any real-world actual usage, games, and applications. A dual-channel DDR4-2133 kit with the lowest possible timings would probably work out better, more efficient use of the Skylake's memory bandwidth, no XMP (ie: memory overclocking) instabilities or complications.

JustinThyme
01-13-2016, 01:24 AM
I had a totally different experience with my G751. There are no settings in the BIOS to change anything memory related. I pulled all of the stock sticks PC3-12800(1600Mhz) and replaced them with DDR3L PC3-1600 (2133Mhz) and the BIOS reflected the change and the SPD was read and applied without doing a thing it went to 2133Mhz.

https://rog.asus.com/forum/showthread.php?53752-1-35V-memory-required-in-G751-G771-G551s-(same-as-G750)&p=529552&viewfull=1#post529552

Im expecting the G752 to do the same or at least to as fast as it can go.

Skylake wont run DDR3L, wrong voltage and configuration. DDR3L is 1.35V and 204 pins where DDR4 is 1.2V and 260 pins