Sep 22, 2021
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I bought Acer Nitro 5 AN515-57 ( i5-11400H, RTX3050, 8GB RAM DDR4-3200MHZ ) one month ago. And a few days ago, i prepared to upgrade more one stick of RAM, so i used CPU-Z to check my bus RAM. On memory tab, it show me that DRAM frequency is 798.1MHZ (it means RAM is running at 1600MHZ?), but in task manager, i still see bus RAM is 3200MHZ.
Then, i upgrade my laptop with a stick of 8GB RAM DDR4-3200MHZ of Kingmax. And i check CPUZ again, this time DRAM frequency is only 731.6MHZ. And in task manager, bus RAM is 2933MHZ. I also check my memory clock by HWinfo, it shows me that memory clock is 1463.1 MHZ (the same with CPU-Z: 731.6 x 2 ~ 1463.1MHZ)
I've tried to config bus RAM in BIOS, but BIOS of my laptop has no option for config bus RAM.
Some one got the same problems with me on AN515-57?
Some how can my laptop run at max speed of RAM? :((
This ggdrive link has screenshots about my laptop: https://drive.google.com/drive/folders/1eQhkX62adkNPIx_x3UqyMQ7AtPkuOaPl?usp=sharing
 

Bob.B

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Feb 8, 2021
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I bought Acer Nitro 5 AN515-57 ( i5-11400H, RTX3050, 8GB RAM DDR4-3200MHZ ) one month ago. And a few days ago, i prepared to upgrade more one stick of RAM, so i used CPU-Z to check my bus RAM. On memory tab, it show me that DRAM frequency is 798.1MHZ (it means RAM is running at 1600MHZ?), but in task manager, i still see bus RAM is 3200MHZ.
Then, i upgrade my laptop with a stick of 8GB RAM DDR4-3200MHZ of Kingmax. And i check CPUZ again, this time DRAM frequency is only 731.6MHZ. And in task manager, bus RAM is 2933MHZ. I also check my memory clock by HWinfo, it shows me that memory clock is 1463.1 MHZ (the same with CPU-Z: 731.6 x 2 ~ 1463.1MHZ)
I've tried to config bus RAM in BIOS, but BIOS of my laptop has no option for config bus RAM.
Some one got the same problems with me on AN515-57?
Some how can my laptop run at max speed of RAM? :((
This ggdrive link has screenshots about my laptop: https://drive.google.com/drive/folders/1eQhkX62adkNPIx_x3UqyMQ7AtPkuOaPl?usp=sharing
Got the latest bios?
https://www.acer.com/ac/en/AE/content/support-product/8963?b=1

2 different sticks of ram may never play nice together.
 
Reactions: RaijinRyuu
Sep 22, 2021
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Testing one stick at a time what does task manager show for ram speed?

Testing with both sticks installed what does task manager show for ram speed?
When i install one stick, CPU-Z show DRAM frequency is 798.1MHZ and task manager show speed is 3200MHZ.
When i install two sticks, CPU-Z show DRAM frequency is 731.6MHZ and task manager show speed is 2933MHZ.
Two stick of RAM is 8GB DDR4-3200MHZ.
 
Sep 22, 2021
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Testing one stick at a time what does task manager show for ram speed?

Testing with both sticks installed what does task manager show for ram speed?
https://www.userbenchmark.com/UserRun/46482253 this is my userbenchmark when i install 2 sticks of RAM, I see speed of RAM is 20.3GB/s and 16.4GB/s. I compare with several other test with 2 sticks of DDR3-1600 RAM on this site, it has the same value, ~ 20GB/s. For others test of 2 sticks of DDR4-3200 RAM on this site, the result ~30-40GB/s. I think my laptop is running on ~ 1600MHZ.
 

Bob.B

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Feb 8, 2021
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When i install one stick, CPU-Z show DRAM frequency is 798.1MHZ and task manager show speed is 3200MHZ.
When i install two sticks, CPU-Z show DRAM frequency is 731.6MHZ and task manager show speed is 2933MHZ.
Two stick of RAM is 8GB DDR4-3200MHZ.
Sounds right.
A single stick shows 3200.
When you put 2 mismatched sticks in the pc the fastest the bios can get the 2 sticks to play nice together is 2933.

If you really want 2 sticks and 3200 speed shop for a 2x8GB kit.
 
Sep 22, 2021
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Sounds right.
A single stick shows 3200.
When you put 2 mismatched sticks in the pc the fastest the bios can get the 2 sticks to play nice together is 2933.

If you really want 2 sticks and 3200 speed shop for a 2x8GB kit.
I think it's not the point. Before i upgrade, the CPU-Z show the DRAM is only 798.1MHZ. And in userbenchmark, my RAM has speed over 10GB/s ~ the same with other DDR3-1600MHZ Ram.
And now, it is not run with 2933MHZ. Do you watch the userbenchmark? My laptop is still run at 1600MHZ.
My laptop never ever run with 3200MHZ or 2933MHZ.
 

Bob.B

Respectable
Feb 8, 2021
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I think it's not the point. Before i upgrade, the CPU-Z show the DRAM is only 798.1MHZ. And in userbenchmark, my RAM has speed over 10GB/s ~ the same with other DDR3-1600MHZ Ram.
And now, it is not run with 2933MHZ. Do you watch the userbenchmark? My laptop is still run at 1600MHZ.
My laptop never ever run with 3200MHZ or 2933MHZ.
What speed does task manager show a single stick of ram is running at?
 
Oct 15, 2021
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I have this problem too with acer nitro 5 an515-57-556r and ram running at 1600mhz. Bcz this model is new there is no info about this problem anywhere
 
Oct 15, 2021
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i have already updated bios to the latest version 1.10 and chipset driver.... its literally running at 1600mhz just like raijinryuu mentioned
 
Oct 20, 2021
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I bought Acer Nitro 5 AN515-57 ( i5-11400H, RTX3050, 8GB RAM DDR4-3200MHZ ) one month ago. And a few days ago, i prepared to upgrade more one stick of RAM, so i used CPU-Z to check my bus RAM. On memory tab, it show me that DRAM frequency is 798.1MHZ (it means RAM is running at 1600MHZ?), but in task manager, i still see bus RAM is 3200MHZ.
Then, i upgrade my laptop with a stick of 8GB RAM DDR4-3200MHZ of Kingmax. And i check CPUZ again, this time DRAM frequency is only 731.6MHZ. And in task manager, bus RAM is 2933MHZ. I also check my memory clock by HWinfo, it shows me that memory clock is 1463.1 MHZ (the same with CPU-Z: 731.6 x 2 ~ 1463.1MHZ)
I've tried to config bus RAM in BIOS, but BIOS of my laptop has no option for config bus RAM.
Some one got the same problems with me on AN515-57?
Some how can my laptop run at max speed of RAM? :((
This ggdrive link has screenshots about my laptop: https://drive.google.com/drive/folders/1eQhkX62adkNPIx_x3UqyMQ7AtPkuOaPl?usp=sharing
I have the same problem as you but until now I don't know the solution, have you found it?
 

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