Question Why am I not reaching 4k@30hz or 1080@120hz?

[vagagond]

I recently bought a Acer Nitro XV237K, and realized i was limited to 1080@60hz and 4k@30hz, and i cant figure out why. I've made sure the mini display port to hdmi cable can handle both these settings, so i'm thinking that maybe my gpu is my limiter because my ps5 can run 4k@60hz fine. I've got a radeon 295x2 on a rampage v extreme motherboard, and a intel i7 processor. If anyone could suggest anything that'd be very helpful.

 

[kerberos_20]

1080@60hz is correct for your monitor, 4k@30hz is incorrect, but looking at your GPU it can drive 4k@50Hz max with displayport 1.2, but your monitor doesnt have 50Hz mode at 4K
you can however use two display port cables (your monitor supports it), that should give you more available bandwith as long your GPU supports that

 

[Karadjgne]

4k @ 30Hz will be a card restriction, since there's not open settings for upto 50Hz.

As far as the 1080p goes, DP1.2 is good for 144Hz, but that's not always an option, depending on the monitor settings. It's not unheard of for monitors to clamp down on frequency with certain settings unless in 'game mode' with some options disabled like HDR or other such nonsense.

 

[kerberos_20]

4k @ 30Hz will be a card restriction, since there's not open settings for upto 50Hz.

As far as the 1080p goes, DP1.2 is good for 144Hz, but that's not always an option, depending on the monitor settings. It's not unheard of for monitors to clamp down on frequency with certain settings unless in 'game mode' with some options disabled like HDR or other such nonsense.

XV273K User Guide English
Standard timing table

MODE		Resolution
1	VGA	640x480	60Hz
2	SVGA	800x600	56Hz
3	SVGA	800x600	60Hz
4	XGA	1024x768	60Hz
5	SXGA	1280x1024	60Hz
6	VESA	1280x720	60Hz
7	WXGA	1280x800	60Hz
8	WXGA+	1440x900	60Hz
9	WXGA+	1680x1050	60Hz
10	UXGA	1920x1080	60Hz
11	UHD	3840x2160	30Hz
12	UHD	3840x2160	60Hz
13	UHD	3840x2160	120Hz
14	UHD	3840x2160	144Hz

Note:
• HDMI1 (2.0): Support max timing resolution (3840x2160-60Hz), Support HDR.
• HDMI2 (2.0): Support max timing resolution (3840x2160-60Hz), Support HDR.
• DP1: Support max timing resolution (3840x2160-120Hz), Support (FreeSync & HDR).
• DP2: Support max timing resolution (3840x2160-120Hz), Support (FreeSync & HDR).
• DP1 + DP2: AMD Gfx card can support max Timing resolution (3840x2160-144Hz), Not
Support (FreeSync & HDR).
• Need to use VESA certified DP cables

1080p@60Hz is max he can run for 1080p
4k 60 or higher will need dp 1.4
4k 144 will need RX470 as minimum GPU


since his GPU doesnt support 4k@60 on DP1.2 then it doesnt run with HBR or clock is limited to 400MHz, either way GPU upgrade is advised

 

[Glenwing]

Lots of misinformation in these responses.

The 295X2 will support 4K 60 Hz over DisplayPort no problem. DP 1.4 is not required for this.

Passive DP to HDMI adapters are limited to 4K 30 Hz. You will need an active DP to HDMI 2.0 adapter if your display doesn't have DisplayPort. Do you have a link to the DP to HDMI adapter you are using?

 

[kerberos_20]

The 295X2 will support 4K 60 Hz over DisplayPort no problem. DP 1.4 is not required for this.

are you sure
Mini DisplayPort. 4 (version 1.2) Max Resolution: 4096x2160 @ 50 Hz. RAMDAC speed (MHz). 400

Passive DP to HDMI adapters are limited to 4K 30 Hz. You will need an active DP to HDMI 2.0 adapter if your display doesn't have DisplayPort. Do you have a link to the DP to HDMI adapter you are using?

right, didnt notice hes using mini dp to hdmi..dunno why he didnt went for minidp to dp

 

[Karadjgne]

His display will do Dual DP inputs to get 4k @ 120Hz, or 4k @ 144Hz (OC), so monitor inputs aren't the issue. Single cable input can get 4k @ 60Hz.
.
It just makes absolutely no sense as to why a single input that can deal with the bandwidth of 4k @ 120Hz, would also limit 1080p to just 60Hz. That monitor should be well able to do 120/144Hz @ 1080p, single DP input with Freesync.

 

[Glenwing]

are you sure
Mini DisplayPort. 4 (version 1.2) Max Resolution: 4096x2160 @ 50 Hz. RAMDAC speed (MHz). 400

RAMDAC is a digital to analog converter (i.e. VGA output), which the 295X2 doesn't even support, as analog capability was dropped in this generation. It doesn't even have a RAMDAC.

Can you post the source of this information you copied?

Hawaii-based GPUs can support 4K 60 Hz over DisplayPort.

His display will do Dual DP inputs to get 4k @ 120Hz, or 4k @ 144Hz (OC), so monitor inputs aren't the issue. Single cable input can get 4k @ 60Hz.
.
It just makes absolutely no sense as to why a single input that can deal with the bandwidth of 4k @ 120Hz, would also limit 1080p to just 60Hz. That monitor should be well able to do 120/144Hz @ 1080p, single DP input with Freesync.

The available options for selecting resolution and refresh rate aren't based on maximum limits at a technical level, it is a whitelist. The manufacturer manually specifies a list of resolution+frequency combinations that will be made available to the user.

In this monitor, they did not choose to add any other 1080p formats besides 60 Hz, for whatever reason. It's Acer, they often do strange things. If an option is within the bandwidth limits but doesn't appear as an option, it just means the manufacturer didn't bother to include it in the list, which is fairly common for non-native resolutions. If 1080p 120 Hz is desired, I'm sure a custom resolution will work in this case.

 

[kerberos_20]

Can you post the source of this information you copied?

Hawaii-based GPUs can support 4K 60 Hz over DisplayPort.

https://www.msi.com/Graphics-Card/R9-295X2-8GD5/Specification

 

[Karadjgne]

It's Acer, they often do strange things.

ROFL, dude, best answer lol.

 

[Glenwing]

https://www.msi.com/Graphics-Card/R9-295X2-8GD5/Specification

I suspect this was copy-pasted from previous models and forgot to be changed. 400 MHz RAMDAC is what the previous generation had (i.e. Radeon HD 7970) and they were also limited to 600 Mpx/s instead of the full 720 possible on DP 1.2 (though, even that should still be enough for 4K 60 Hz, so really I don't know what the 50 Hz is about).

 

[kerberos_20]

I suspect this was copy-pasted from previous models and forgot to be changed. 400 MHz RAMDAC is what the previous generation had (i.e. Radeon HD 7970) and they were also limited to 600 Mpx/s instead of the full 720 possible on DP 1.2 (though, even that should still be enough for 4K 60 Hz, so really I don't know what the 50 Hz is about).

ye no clue, rest of brands says nothing abot max res, and amd says to check board partners for supported resolutions/frequency lol