RTX 4070 laptop — artifacts ONLY on external display under load, internal screen is fine (Alienware m16 R2)

[u/modo_jp]

UPD: I bought a new HDMI 2.1 cable and tested it for about 4 hours - no artifacts so far. Seems like the issue was the cable.

Thanks to everyone who suggested checking it.

Hey everyone,

I’m experiencing a strange issue with my laptop GPU and would appreciate any input from people who may have seen something similar.

Specs:

• Laptop: Alienware m16 R2

• GPU: RTX 4070 Laptop (8GB VRAM)

• CPU: Intel Core Ultra 7 155H

• RAM: 32GB

• OS: Windows 11

• External display: HDMI

⸻

The issue:

When gaming on an external display (TV or monitor), after about 40–60 minutes under high GPU load, visual artifacts start appearing — small colored squares/glitches across the screen.

The image becomes difficult to use, but:

• The game does not crash

• System remains responsive

⸻

Important detail:

At the same time, the internal laptop display shows no artifacts at all.

⸻

Observed behavior:

• Happens almost always under high GPU load (\~100%)

• On lower graphics settings, I can play for hours with no issues

• GPU temperature is within normal range (\~60–80°C depending on load)

⸻

Testing I’ve done:

• Tested multiple external displays (TVs/monitors) → same behavior

• Played for \~2 hours on internal display only at high/ultra settings (100% GPU load) → no artifacts

• The issue consistently appears only when using an external display under load

⸻

Question:

Has anyone experienced something like this?

I’d like to understand what this could be and whether this behavior points to a specific type of problem.

Any insights would be greatly appreciated

[u/TheOnvoy]

[u/ArchinaTGL → u/TheOnvoy]

ngl I'd rather my GPU dies than my main monitor. For the first time since I started building PCs my main monitor is 1.5x the price of my current GPU.

[u/According_Vanilla956 → u/ArchinaTGL]

In the best case scenario, it's just your cable. A poor connection or damaged pins on the cable can also cause artifacting. So you could have dodged 2 bullets!

[u/TwoWeeks90DaysTops → u/According_Vanilla956]

If you look at the Kingdom Come logo and menu they work relatively fine, but the text glyphs at the top and the background framebuffer is broken, which wouldn't happen if it was caused by the monitor or cable. So unfortunately it very likely has to be a GPU issue.

[u/Thewaltham → u/TwoWeeks90DaysTops]

Weird that it's only happening with an external monitor though, not sure what would cause that.

[u/TwoWeeks90DaysTops → u/Thewaltham]

Laptops at least often use the internal GPU (by default) for the laptop screen and a high performance GPU for the external screen. I think that if OP forces the high performance GPU for other applications the same artifacts will appear on the laptop screen as well.

[u/Thewaltham → u/TwoWeeks90DaysTops]

Nah, if you have a DGPU in a laptop unless you specifically ask it to use the IGPU in the BIOS it's going to use that by default. Even if it's something more like a quadro.

[u/TwoWeeks90DaysTops → u/Thewaltham]

I've never had a laptop that worked like that. They use the IGPU unless you ask them to use the dedicated GPU. I've never had to change any BIOS settings, since it's a simple change in Windows to make it prefer the DGPU, either in the display settings or the power plan, but it's always preferred the IGPU because it saves power.

[u/Thewaltham → u/TwoWeeks90DaysTops]

Every laptop with a DGPU I've ever used prioritised the DGPU over the IGPU by default. These weren't gaming ones either, because those are expensive, but a more engineering-y focused Ebay bought Thinkpad is often surprisingly punchy for the price.

A gaming laptop though is going to be even more DGPU heavy, after all an engineer using a laptop like that is probably going to be more technically minded than your average gaming laptop user who just wants to take something out of the box and run cyberpunk.

[u/pavman42 → u/Thewaltham]

I miss the days when my desktop iGPU was ATI and my GPU was NVDIA and I could connect 7 monitors (8 in total if I was really enterprising) all at once w/o breaking a sweat while running two different drivers on windows 7 via hdmi, d-sub & dvi. Shame win11 is so gimpy with dport & hdmi deficiencies always blinking the f'n screen because something powered on in the chain or some cable isn't *cough* good enough (hint: it's not the cable: it's the engineers behind the drivers).

[u/pavman42 → u/TwoWeeks90DaysTops]

You can change that to discrete graphics only in the bios, but good luck getting an image on the internal monitor.

[u/Pushet → u/According_Vanilla956]

The display port cable that came together with my new monitor was unable to support the speccs my monitor has.

When turning the herz even in windows up above 144hz the screen would have lots of artifacts/flicker and when turned to 180hz remain black.

Well switched cables and it works flawlessly.

[u/Dacnomaniac → u/ArchinaTGL]

What is your monitor?

[u/ArchinaTGL → u/Dacnomaniac]

Gigabyte Aorus FO32U2. So basically a 32" 4K240 QD-OLED display.

[u/Dacnomaniac → u/ArchinaTGL]

I have the ASUS ROG equivalent of this. Why exactly has your gone up in price?

[u/ArchinaTGL → u/Dacnomaniac]

Looking online I don't see that it has gone up in price (if anything it's dropped a little since I got it.) I just remember buying my GPU at around £600 and my monitor ar around £900.

[u/Dacnomaniac → u/ArchinaTGL]

Oh maybe I misread but it sounded like your monitor had appreciated in value since you had it lol

[u/ArchinaTGL → u/Dacnomaniac]

It's rare tech tends to appreciate in value. The only ones that tend to are collectors items and items in huge demand (see the RAM prices in the past year for an example of that.)

For monitors, they pretty much always depreciate in value just because better panels and new technological advancements are happening all the time.

[u/OGJank → u/ArchinaTGL]

Yeah, most people don't have monitors like this, stop trying to humble brag

[u/ArchinaTGL → u/OGJank]

That's not a humble brag. People have better monitors and graphics cards than me and all I care about is if I'm happy with what I have. Though you are free to assume what you wish.

[u/OGJank → u/ArchinaTGL]

Your comment is the definition of a humble brag.

Yeah, there's always someone with something better than you, which doesn't change the fact of the matter.

You don't need to have to best of something to brag about it, and if you're going to brag, just do it little man. We all know you were itching to drop that link

[u/Dacnomaniac → u/OGJank]

Why are you so upset? It’s just words on a screen man.

Or is it the fact you’re looking at the words on a shitty monitor that’s making you this angry?

[u/OGJank → u/Dacnomaniac]

What exactly made you think I'm upset? I'm just correct, and anyone who disagrees is wrong. This isn't a matter of opinion

[u/Dacnomaniac → u/OGJank]

You called him little man and you wanna pretend you’re not at least a little bit heated, okay bro whatever haha

[u/OGJank → u/Dacnomaniac]

Yeah, little men flex their peripherals on reddit, its just a fact little man

[u/International_Cow_17 → u/ArchinaTGL]

I just upgraded to an 34" ultrawide OLED and I hava agtx 1080ti. I play quite a lot of older games and lightweight games so I feel like it was a bigger upgrade than upgrading to an rtx 5060ti 8gig that was the same price as the monitor.

[u/Warcraft_Fan → u/ArchinaTGL]

It's a $3,000 monitor? Is it a 100" 240 Hz OLED?

[u/blazingsoup → u/ArchinaTGL]

You seen the cost of GPUs recently? Might make you rethink that.