AN515-52 RAM Upgrade Question: RAM Running Slower than Spec

Hello.

I was referred to the following website when I asked support about where to buy RAM/memory for my AN515-52:
https://www.crucial.com/usa/en/compatible-upgrade-for/Acer/nitro-5-an515-52

I then proceeded to buy this kit: Ballistix Sport LT 16GB Kit (2 x 8GB) DDR4-2666 SODIMM [BLS2K8G4S26BFSDK]
https://www.crucial.com/usa/en/nitro-5-an515-52/CT12437476

Everything went smoothly until I installed the RAM and booted to Windows.
The RAM only runs at 2400MHz even though it's rated at 2666MHz. (timings are correct though)

The RAM that came with the machine ran at 2666MHz so I know it's capable of doing it.

This wouldn't have been a problem if I could've edited the speed myself in BIOS, but I can't, so here we are.

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andylb

BromTeque said:

Hello.

I was referred to the following website when I asked support about where to buy RAM/memory for my AN515-52:
https://www.crucial.com/usa/en/compatible-upgrade-for/Acer/nitro-5-an515-52

I then proceeded to buy this kit: Ballistix Sport LT 16GB Kit (2 x 8GB) DDR4-2666 SODIMM [BLS2K8G4S26BFSDK]
https://www.crucial.com/usa/en/nitro-5-an515-52/CT12437476

Everything went smoothly until I installed the RAM and booted to Windows.
The RAM only runs at 2400MHz even though it's rated at 2666MHz. (timings are correct though)

The RAM that came with the machine ran at 2666MHz so I know it's capable of doing it.

This wouldn't have been a problem if I could've edited the speed myself in BIOS, but I can't, so here we are.

Although the pre installed RAM is 2666mhz you model is downclocked to 2400mhz by default and is not editable/ I think Acer got a good deal on a job lot of 2666mhz but it is a 2400mhz Laptop

BromTeque

andylb said:

BromTeque said:

Hello.

I was referred to the following website when I asked support about where to buy RAM/memory for my AN515-52:
https://www.crucial.com/usa/en/compatible-upgrade-for/Acer/nitro-5-an515-52

I then proceeded to buy this kit: Ballistix Sport LT 16GB Kit (2 x 8GB) DDR4-2666 SODIMM [BLS2K8G4S26BFSDK]
https://www.crucial.com/usa/en/nitro-5-an515-52/CT12437476

Everything went smoothly until I installed the RAM and booted to Windows.
The RAM only runs at 2400MHz even though it's rated at 2666MHz. (timings are correct though)

The RAM that came with the machine ran at 2666MHz so I know it's capable of doing it.

This wouldn't have been a problem if I could've edited the speed myself in BIOS, but I can't, so here we are.

Although the pre installed RAM is 2666mhz you model is downclocked to 2400mhz by default and is not editable/ I think Acer got a good deal on a job lot of 2666mhz but it is a 2400mhz Laptop

So it's not possible to buy 3rd party 2666MHz RAM upgrades?

I know the CPU (8750H) supports up to 64 GiB of dual-channel DDR4-2666 memory.

I'm also baffled by the fact that there is absolutely no actual user control in UEFI BIOS either.

andylb

from what I understand and from all the previous posts on this same subject 2400 is the speed but check directly with Acer

trfon

i'm deliberating the same issue to upgrade my ram. so if the laptop does not support 2666, why does the win 10 os say that is running at 2666 with the factory 4gb? I have returned my memory upgrade that brought this speed down to 2400. I see this under task manager -> performance tab -> memory section of the win 10 software

JordanB

trfon said:

i'm deliberating the same issue to upgrade my ram. so if the laptop does not support 2666, why does the win 10 os say that is running at 2666 with the factory 4gb? I have returned my memory upgrade that brought this speed down to 2400. I see this under task manager -> performance tab -> memory section of the win 10 software

I found some RAM that is not only compatible with your computer at 2666, but also compatible with your existing RAM at 2666.

https://www.kingston.com/us/memory/search?model=98315&deviceType=3&mfr=ACE&line=Aspire

andylb

Even if it says 2666 it is running at 2400

trfon

trfon said:

i'm deliberating the same issue to upgrade my ram. so if the laptop does not support 2666, why does the win 10 os say that is running at 2666 with the factory 4gb? I have returned my memory upgrade that brought this speed down to 2400. I see this under task manager -> performance tab -> memory section of the win 10 software

I found that switching the additional 8g with the factory 4g to different positions in the 2 memory slots achieved 2666 . i was satisfied.

when i had a software issue, i reloaded windows without touching internals or memory. memory speed dropped back down to 2400. i was puzzled and disgusted.

so i know that when i feel like i need 2666 again i will open it up, remove the extra memory, reload OS, then re-add 8gb. just wish acer had not restricted clock speed by not having anything to adjust clock speed in the BIOS. never thought I'd miss mother board jumpers, but yet here i am on a laptop without them

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