AMD’s Mobile Revival: Redefining the Notebook Business with the Ryzen 9 4900HS (A Review)
by Dr. Ian Cutress on April 9, 2020 9:00 AM ESTRyzen 9 4900HS with DDR4-2666 and DDR4-3000
In our ASUS Zephyrus G14, we have a total of 16 GB of DDR4. This is split between a single SO-DIMM module of 8 GB, and a set of 8 GB memory soldered onto the board. AMD will offer a version with 16 / 16, however this might come at a later date.
This memory is running at the AMD recommended for these processors, DDR4-3200. Through our inspection tools, we can tell that this memory is running with subtimings of 22-22-22 with a command rate of 1T. The command rate is certainly good, however the 22-22-22 is a little slower than what we see on a desktop system running at this speed, because here we have a system that conforms to JEDEC’s subtiming requirements.
For our memory testing we wanted to see what speeds and capacities we could achieve. Corsair very kindly sent us some modules of 16 GB DDR4-3000 and a module of 32 GB DDR4-2666. This would give our system either 24 GB or 40 GB total respectively, which for a machine designed to do heavier duty workloads, having >16 GB is certainly welcome, as long as the performance hit isn’t too much.
I installed the 32 GB module, and the system booted first time with no fuss. A quick look to see if all the capacity was seen, and we had a total of 40 GB. The speed was also as expected, at DDR4-2666 but with subtimings of 20-19-19 1T.
However, when we put in the module of 16 GB DDR4-3000, to get a total of 24 GB, the detected speed inside the system was only DDR4-2666. Looking at the module settings, this was because the DDR4-3000 speed was actually an XMP profile, and ASUS has not enabled the ability to set XMP profiles here.
We were able to get DDR4-2666 on the 32 GB module because this is the base frequency and settings for the module. The same with the 8 GB module that came with the system – it was flashed so that the basic SPD setting was DDR4-3200. If users want to get high capacity modules with the faster DRAM speeds on this system, they will have to configure the primary SPD profile of their modules, which isn’t an easy thing to do.
As a result, our tests are going to come down to the 8 GB DDR4-3200 module that came with the system, and compare it to the 32 GB DDR4-2666 module. Note that the latter is an 8+32 configuration, which is expected to run in dual channel for the first 16 GB, and then single channel for the next 24 GB.
With our AI test, there’s a ~20% benefit from having the faster memory, which decreases slightly when moved to a limited power budget.
We didn’t see any difference in something like Cinebench.
There was more of a difference in PCMark 10, however PCM10 isn't that great in showing where the bottlenecks are.
Integrated Graphics Tests
For the Civ 6 graphics test, the difference in performance between the two memory settings is really significant. This sort of game cares less about FPS, however going down to 22 FPS for 1080p Max and No MSAA means that the user probably has to dial that back a bit to get something more reasonable.
Going from plugged in to not plugged in, we didn’t see much of a change with the slower memory, however the DDR4-3200 setting still gets a serious benefit over the DDR4-2666 arrangement.
For Final Fantasy, there a significant change - moving up from DDR4-2666 to DDR4-3200 affords a +30% improvement.
Discrete Graphics Tests
In each case, the faster DRAM actually improves discrete graphics performance.
Quick Thoughts
Overall, 16 GB of memory in a system like this isn't the best configuration - people who need the power are going to likely want 32 GB. However, users putting in their own fast module when buying the 16 GB version are going to have to be careful about the performance. Both the integrated graphics and the discrete graphics take a knock on performance going down from DDR4-3200 to DDR4-2666.
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alufan - Friday, April 10, 2020 - link
As an it pro you should know betterhttps://www.amazon.co.uk/Anker-Ethernet-Including-...
Cooe - Thursday, April 9, 2020 - link
Because sticking a cheap USB adapter on the end of the Ethernet cable you plug into is just too much work? That problem is really minor to fix tbh.Icehawk - Sunday, April 12, 2020 - link
Agreed, for a home user - which this is aimed at I think it’s NBD but for enterprise machines I much prefer an integrated NIC so I don’t need to rely on a customer having a dongle (they won’t) or remembering to bring one. Sadly they are hard to find these days in this size laptop.At least this machine has a DIMM slot instead of soldered only.
GreenReaper - Monday, April 20, 2020 - link
Sure, but having to mod your memory because they didn't enable XMP profiles is not super-convenient. I'm sure Asus would like you to buy their RAM, but still. (Or perhaps it's an issue of Intel not giving the necessary data?)1_rick - Thursday, April 9, 2020 - link
What do you need a webcam for? I've seen a bunch of people here and at other sites call the lack of a webcam a hard pass.I use teleconferencing software extensively at my day job, both for meetings among people in different offices (and at home) and for meetings with clients, and nobody uses a webcam, although we're all far more interested in screen sharing, either to show someone how to do something, or to show a document of some kind, or whatever.
schujj07 - Friday, April 10, 2020 - link
^ThisTotally agree with this. I do the same thing and screen sharing is far more important for me in the IT world than a webcam. If you need a webcam go out and get a good one from Logitech instead of the included garbage on most laptops.
1_rick - Friday, April 10, 2020 - link
Yeah, that's the other thing--why wouldn't you want a better camera than the potato 720p you'll get with a laptop, if you do need one?haukionkannel - Saturday, April 11, 2020 - link
Webcams Are useful for personal contacts. At work I keep webcam mostly closed.And there Are/will be Also models with it, so people can chose what They pay for. So no worry if one Gaming laptop does not have it :)
Deicidium369 - Sunday, April 12, 2020 - link
People making imaginary purchases....sonny73n - Saturday, April 11, 2020 - link
That and privacy issue too. I have a piece of black electrical tape cover my laptop webcam. I would not know when it turns on by itself and snoops on me like those Samsung TVs a while back.The aholes would say I got something to hide. I would like to let them know that I’d rather break the law or break their faces than letting myself caught in my most embarrassing moments.