Frequency locked at 144hz
SolvedEric -
Good evening/Hello everyone,
I just purchased a new PC monitor (the AOC 24G2/BK model in 24 inches) connected via HDMI to my laptop (the latest model of the "Legion 5 slim" from Lenovo) and, although it promises a resolution of up to 165hz, my settings indicate a maximum frequency of 144hz.
Note that the screen came with a DisplayPort cable. While my PC supports this technology (apparently through USB-C), I do not have the proper port.
Can anyone explain to me why it doesn't go any higher? Is it due to the HDMI connection, is that frequency only achievable via DisplayPort?
7 réponses
Hello everyone,
Just to let you know, the problem has been solved with a DP-USB-C to DP cable connected to the screen, plus a much better color rendering!
Hi
This screen reference shows a 144hz model, not 165.
https://www.lcd-compare.com/moniteur-AOC24G2BK-AOC-24G2BK.htm
In any case, you have to be careful with the specifications; generally, the max frequency is achieved via DP, rarely through HDMI...
Moreover, if you don’t have a native DP output on your PC, and the 165hz frequency is exclusively via DP, that’s dead.
That said, it really doesn't bring anything to be at 165 compared to 144....
Signature
Waiting for other replies; I attract trolls....
Good evening,
This is precisely the model: https://aoc.com/fr/gaming/products/monitors/24g2sae-bk (sorry, I forgot a part of the description).
So, theoretically it does indeed reach 165hz (although I imagine the gain is negligible), but, as you mentioned, this must be achieved only via DP. Native connection that I do not have except through USB-C.
However, there are adapters from USB-C to DP or from HDMI to DP. I will look into it.
Hi Eric
Your screen has an HDMI 1.4 input x 2, and also a DisplayPort 1.2 input x 1
An HDMI cable is suitable = you need to buy one
See you later
Hello, generally speaking, the HDMI ports on laptops are limited to a certain frequency depending on the resolution.
So it would be interesting to know how many Hertz your laptop can produce through the HDMI port for 1080p!
If it can produce 165 Hertz for 1080p and you don't have that on your 1080p 165 Hertz screen! Then there must be something fishy going on.
Either an error in the specifications of the laptop, or an error in the specifications of the screen.
So it would be useful to do some checks,
you need to test the HDMI port of your laptop on another 1080p 240 Hz screen for example! If you again get a maximum of 144 Hertz, that would mean that your laptop's HDMI port is capped at 144 Hz for 1080p.
If you get more, then that means there is a problem with the specifications of your initial 165 Hertz screen.
Hello
There's no need to elaborate, Eric has understood the problem as I responded in my first post.
The frequency limitations are rarely caused by the PC but by the technology supported by the monitor, in this case, his monitor is limited to 144 Hz over HDMI.
This is confirmed by the manufacturer's data:
VGA/HDMI1.4 :48-144Hz (V)_____________ DP1.2:48-165Hz (V)
It will only display 165 Hz over DP 1.2
The question now is whether a USB-C to DP 1.2 adapter can handle 165 Hz; that's Eric's problem. Personally, I don't have an answer on that point, it needs to be tested.
Signature
Waiting for other responses; I'm attracting trolls....
Hello, yes there’s no problem, and you’re not even required to connect to the HDMI port of the screen (you need to connect to the port that supports 165 Hz),
In the specifications you provided, if the laptop is unlocked at 240 Hertz on its HDMI 2.1 port, you just need to connect the other end to the DisplayPort 1.2 of the screen. And there should normally be 165 Hertz. But if the HDMI port of the laptop is limited to 144 Hertz, you will still get 144 Hz with an adapter to the DP port.
As for the USB-C of the laptop, you need to test it similarly to the HDMI port. See how high it goes.
However, if the technical specifications of the laptop indicate DP 1.4, it should work just fine (DisplayPort 1.4 supports 1440p resolution up to 240 Hz, and even 4K up to 120 Hz).
PS: for the cable, you need at least HDMI 2.0 (output) to DP 1.2 (input) (165 Hz at 1080p)
or USB-C 3.2 Gen 2 to DP 1.2 (with USB-C that supports 165 Hz at 1080p)
Thank you all for your responses. I will test the cable solution and I will get back to you with updates.
However, I noticed another small issue and perhaps some of you can shed some light on it.
While the colors are quite good (a bit less than the native screen of the laptop), I just noticed a small inconvenience (or not) regarding the cursor of my mouse as well as the text on a black background: indeed, concerning the mouse, I can perceive a sort of green trail when I move the cursor fairly quickly against a dark background, as well as a red color behind each letter of text on a white background, yellow on a black background, and sometimes the three colors corresponding to the RGB color code only in scrolling mode. This is something I do not have on the native screen of my laptop.
Do you think this could be due to my HDMI cable or the resolution of my screen?