Hello!
Maybe a silly question, but have to ask 
I have a Alienware R15 gaming pc.
I have a Samsung 49" Odyssey G9 Neo and in the manual it says:
Optimal resolution ā 5120 x 1440 ved 120 Hz (DisplayPort)
In the manual of Alienware it says when using the Nvidia 4090 RTX card:
Maximum supported resolution DisplayPort:
ā 7680 x 4320 ved 120 Hz4
ā 7680 x 4320 ved 60 Hz5
ā 7680 x 4320 ved 60 Hz6
ā 5120 x 3200 ved 60 Hz7
ā 5120 x 2880 ved 60 Hz7
So the question is:
Does i mean that i have to put my screen at 5120 x 1440 at 60 Hz?
Thanks!
No. Leave it at 120hz. Max supported at 120Hz is 7680 x 4320 you are well below the Max. You are also below the Max for 60Hz.
What Bobo said.
I think this math is right:
7680 x 4320 x 120 = 3,981,312,000 pixels per second.
5120 x 1440 x 120 = 884,736,000 pixels per second.
I forgot to add this:
It is what the number after āHzā means:
4 :Requires two DisplayPort 1.4a links and DSC compression.
5: Requires either a single DisplayPort 1.4a link with DSC compression or two DP links with no compression.
6: Using DSC compression.
7: Uncompressed.
Samsung 49" Odyssey G9 Neo have: DisplayPort 1.4
And when i chec Nvidia page about the 4090 it says:
Maximum Resolution & Refresh Rate ā 4K at 240Hz or 8K at 60Hz with DSC, HDR
So i am little bit lost 
Hz means Hertz, Its the monitor refresh rate. 120 would mean refresh is 120 times per second.
Yes correct.
But what should i follow to have the most optimalised resolution? Nvidia? Screen? Alienware?
Run your monitor at max resolution at 120Hz.
and here is some recommended reading:
You can run a monitor and a video card at their respective max resolution or below. The max resolution of a video card and of a monitor are two different things.
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