Aero 15 YD Tiger Lake Memory Behavior

Hello! I just picked up an Aero 15 YD (11800H + 105W 3080) to "side-grade" from a Clevo P775. I know that it's not really faster, but it's a lot more portable, so I'm still happy.

However, I noticed that although the system came with DDR4-3200 CL22 RAM, HWINFO reports 1333MHz, while CPU-Z has the RAM frequency changing from 800MHz to 1333MHz. I was expecting 1600MHz.

Then, I tried the G.Skill DDR4-3200 CL18 that came out of the Clevo. It needs XMP to do that, and understandably it ran at 1200MHz... that's the JEDEC speed.

Finally, I plunked $200 down for 2 sticks of Kingston Hyper-X DDR4-3200 CL20 JEDEC... and, they ran at the same 800MHz to 1333MHz.

In the (locked, stock) BIOS, it does show Memory Speed as "3200MT/s", which is what Intel shows Tiger Lake to be capable of. I didn't check if that value changed when I had the G.Skill in there.

So, I'm wondering is that normal behavior? Or should I try to get the BIOS unlocked?

 

Hi there, I'm sorry I can't answer your question, and I'm interested to know as I want the Aorus 17GYD which looks to be the same to me, maybe different screens? I know I read somewhere that some crucial ballistix ram modules weren't running at their specified 3200mhz but I suppose you ruled that out since you tried other ram and that probably wasn't what was included. I don't understand why it would be marketed at 3200mhz if it can't run at that speed? Where did you purchase the laptop? Was it be a distributor who did upgrades for you? I wanted to actually ask a few of my own if I may. What are the specs of the 775DM that you just upgraded from? I'm coming from a 770DM-G with i6-6700k and 970m so I have to believe I'd be happy with this setup even with the majorly gimped 3080. I was looking at getting clevos new NH77HPQ but it has a 3060 running at 85W turbo boost up to 105W so I'm wondering if this 3080 @ 105 is any different? What are the temps like under load/gaming as of course looking at the profile of this thing it makes me scared just thinking they stuffed a 3080 in there. Sorry to hijack the thread, thank you.

 

Hi.
I have Aorus 15 P YD (11800H - 109W and RTX3080 - 130W)

It is totally OK. RAM is tested and can handle XMP profiles running at 3200Mhz
But it is not fair advertising RAM as 3200Mhz when it laptop it runs at 2666Mhz. (you will see 1600Mhz or 1333Mhz because they are DDR)
Laptop i7 11th gen processors can handle max 2666Mhz as standard frequency.
To run higher you need to enable XMP. To enable XMP you need to change it in BIOS. To change it in BIOS you need to unlock BIOS. And there is no easy way to do it.

When you unlock BIOS your RAM will run in XMP2 mode.
It is running 3200Mhz without any problem
The stock RAM installed is good and there is no reason to change it.

Even when you find faster RAM you will not feel that in games.
Main problem of laptops is cooling and because of that CPU/GPU throttling.
You can try to undervolt CPU and GPU that will give you better thermals and better performance.
And we get back to unlocking BIOS again to do it on CPU.
But still you can do it on GPU using MSI Afterburner..

 

Ok excellent, thank you for the reply. I ultimately went for the MSI GE76‐11UH-245 with 11800h and 3080 with 165W TGP. Their BIOS is famous for being able to unlock with a simple keyboard combination and I like the extra power being given to the 3080.

Sent from my SM-G970U using Tapatalk

 

I have the 11800h KD version with a 3060 gpu. Got an unlocked bios over at winraid and have looked into this. Got some weird results.

So at stock, it seems the memory clocks are timings are being set dynamically. CPU-z shows changing clock and timings depending on load, while hwinfo shows changing timings. I think both utilities aren't capable of reading this correctly at the moment. I have tested with the latest aida64 beta and passmark memory benchmarks. CPU-z shows the memory clock up to 3200CL22 during these benchmarks. Hwinfo if I recall shows the timings go up to CL22 during some of these benches.

With the unlocked bios, if I turn on overclock mode in one of the unlocked sections, it forces the memory to always run at XMP2 profile which is 3200CL22. Now the problem is, I get much worse latency in those benchmarks, from 10-15 more ns latency. Some of the bandwidth benchmarks are slightly better, but not by much. Some other memory benchmarks are worse than stock settings with the dynamic clocks. Even when I manually set the memory clock and timings to say 3200 21-21-21-62 with the same other subtimings as XMP profile, I actually get even worse latency results than 3200CL22. However some things like read bandwidth go up. So something is weird here. I know that aida64 probably calculates latency based off reading detected clock or timing values so it may not be trustworthy. But in passmark, the latency and other benchmark results also tank under the same conditions. For now, I am just leaving it on stock settings with the dynamic clocks.

 

Yeah I know alot of the diagnostic programs aren't up to date with the Tiger Lake H series so it will be a bit while they work the bugs out. Sounds like stock settings is a smart move for you, at least for now until you can get more reliable readings.

Sent from my SM-G970U using Tapatalk

 

I experienced exactly the same with the lentency when running on XMP.
Strange...

 

I'm not so sure about that. Intel's specs sheet say up to 3200 MT/s. And XMP is tagged as OC'ing and not covered by their warranty. Why would they put XMP speed in specs sheet for the Cpu if this isn't mem speed they can or will guarantee?

 

Yesterday i changed some speeds
from: XMP2 => 22/22/22/52 and Trfc 880
to: Custom => 20/20/20/44 and Trfc 660

I was burning RAM all night and looks stable
In tests the change in latency is about 2-3%

After that i am not planing to go lower and test it again.
It doesn't make big impact in sense from performance in my case.
Cinemabench, Futuremark gains/looses are in error range.

I didn't tested games yet. Maybe there will be some change.

 

How do you know what to change the numbers to? Is there some formula? I don't have your laptop but I have a new GE76 with stock Samsung RAM with CL22 (I don't know all the timings as I'm not sitting in front of pc) but I don't know what to change the numbers to. I see the option in the BIOS to alter all the settings. It's currently running at 3200Mhz.

Sent from my SM-G970U using Tapatalk

 

I have stock RAM too. Some Samsung one.
You just set some value down and test for stability for few hours.
I just set it from 22 to 20 (about 10% to make it worth something)
Maybe i will try to go down to 19 and do night testing again.
To make more stable you can rise voltage. But in laptop i don't want to generate more heat. Thermals are the biggest issue.

Typically you set Tcas Trcd Trp to the same value, some say the most important is Tcas with direct impact on latency.
Tras optimally should be ( Tcas+Trcd/Trp ) x 120%. It can't be lower then Tcas+Trcd/Trp. I go for 110%.
Trc is computed automatically from values above.

Trfc is recharge time. It can be set to any stable value. I don't think it make a big difference.