F5F Stay Refreshed Hardware Desktop After upgrading your GPU or monitors, Wi-Fi problems may occur.

After upgrading your GPU or monitors, Wi-Fi problems may occur.

After upgrading your GPU or monitors, Wi-Fi problems may occur.

A
acromo
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167
09-04-2025, 05:04 AM
#1
Hi everyone! I’m facing a tricky problem and would love some guidance. Setup details: CPU – Intel Core i7-12700K; Cooler – Noctua NH-D15 chromax.black; Motherboard – MSI MAG Z790 TOMAHAWK WIFI DDR4 ATX LGA1700 (BIOS 7D91v1H); RAM – G.Skill Ripjaws V 64 GB (2 x 32 GB) DDR4-3600 CL18; GPU – Gigabyte GAMING OC GeForce RTX 4080 SUPER 16 GB (previously ASUS STRIX 1080); PSU – SeaSonic FOCUS GX 850W 80+ Gold Fully Modular; Monitors – three Dell G2724D 27" 2560x1440 at 165Hz using provided cables; Router (Mikrotik heX PoE) & access point (EAP 650). Everything is in the same room, no obstructions, and all devices run at full speed without issues. Windows 11 10.0.26100 is installed, network adapter Wi-Fi 6 AX201 v23.140.0.3, Bluetooth 23.40.0.2.

Problem: When all three monitors are connected via DisplayPort, my Wi-Fi barely picks up the 5GHz band and often drops out completely. When it does work, I get no internet at all. On 2.4GHz it detects the band and sometimes connects, but the speed is painfully slow (0.xx Mbps vs expected 120Mbps). Bluetooth remains stable.

I’ve tried lowering the refresh rate to 60Hz, which makes Wi-Fi appear usable but still inconsistent. I’ve used an external Wi-Fi adapter (TP-Link Wi-Fi 6E AXE5400) but the same issues persist—BIOS, drivers, Windows, chipset, and all system utilities are up-to-date. I’ve even reinstalled Windows and cleared CMOS, switched power outlets, and tested different cables.

I noticed this only appeared after upgrading to the RTX 4080 and switching to higher resolutions.

Questions:
- Could Dell’s DisplayPort or GPU be causing EMI interference? Should I invest in better shielded cables?
- With an 850W PSU, is this a power issue or something else?
- Have others had Wi-Fi problems with multiple high-res monitors or DisplayPort setups? Any tips?
- Would it be worth spending more on quality shielded cables or a better PSU?

Thanks for your help—I’m feeling really stuck!
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A
acromo
09-04-2025, 05:04 AM #1

Hi everyone! I’m facing a tricky problem and would love some guidance. Setup details: CPU – Intel Core i7-12700K; Cooler – Noctua NH-D15 chromax.black; Motherboard – MSI MAG Z790 TOMAHAWK WIFI DDR4 ATX LGA1700 (BIOS 7D91v1H); RAM – G.Skill Ripjaws V 64 GB (2 x 32 GB) DDR4-3600 CL18; GPU – Gigabyte GAMING OC GeForce RTX 4080 SUPER 16 GB (previously ASUS STRIX 1080); PSU – SeaSonic FOCUS GX 850W 80+ Gold Fully Modular; Monitors – three Dell G2724D 27" 2560x1440 at 165Hz using provided cables; Router (Mikrotik heX PoE) & access point (EAP 650). Everything is in the same room, no obstructions, and all devices run at full speed without issues. Windows 11 10.0.26100 is installed, network adapter Wi-Fi 6 AX201 v23.140.0.3, Bluetooth 23.40.0.2.

Problem: When all three monitors are connected via DisplayPort, my Wi-Fi barely picks up the 5GHz band and often drops out completely. When it does work, I get no internet at all. On 2.4GHz it detects the band and sometimes connects, but the speed is painfully slow (0.xx Mbps vs expected 120Mbps). Bluetooth remains stable.

I’ve tried lowering the refresh rate to 60Hz, which makes Wi-Fi appear usable but still inconsistent. I’ve used an external Wi-Fi adapter (TP-Link Wi-Fi 6E AXE5400) but the same issues persist—BIOS, drivers, Windows, chipset, and all system utilities are up-to-date. I’ve even reinstalled Windows and cleared CMOS, switched power outlets, and tested different cables.

I noticed this only appeared after upgrading to the RTX 4080 and switching to higher resolutions.

Questions:
- Could Dell’s DisplayPort or GPU be causing EMI interference? Should I invest in better shielded cables?
- With an 850W PSU, is this a power issue or something else?
- Have others had Wi-Fi problems with multiple high-res monitors or DisplayPort setups? Any tips?
- Would it be worth spending more on quality shielded cables or a better PSU?

Thanks for your help—I’m feeling really stuck!

Reply
Reply
M
miniyonce16
Member
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202
09-04-2025, 05:04 AM
#2
It seems like a bandwidth problem on your motherboard, but since you have a high-end one, that shouldn't be the case. Consider using HDMI instead, or install an external USB/PCIe Wi-Fi adapter—it should be the simplest fix.
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M
miniyonce16
09-04-2025, 05:04 AM #2

It seems like a bandwidth problem on your motherboard, but since you have a high-end one, that shouldn't be the case. Consider using HDMI instead, or install an external USB/PCIe Wi-Fi adapter—it should be the simplest fix.

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