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July 14th, 2025 19:08
Precision 5570 with Dual 4k @ 60Hz Dell Monitors
I have been trying without success for over a week now to get my precision 5570 running a dual 4k monitor setup. I have 2 Dell S2721QSA monitors, and I have tried connecting to both a WD19S 180w docking station, and a WD19DCS docking station. With both, I am not able to run dual 4k setups. The best I have gotten so far is dual 2k @ 59hz with 2 DP cables.
I have ensured all my drivers are on the latest versions, and have tried various different DP1.4 cables. I cannot seem to find a solution to this.
I saw on some articles that the WD22TB4 should work, but I dont want to drop another few hundred on another docking station for it also not to support a dual 4k @ 60hz setup.
From reading the compatibility guide on my laptop, it mentions it can support up to 3 4k external monitors at 60hz
Looking for any advice anyone has to offer on my situation
ejn63
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July 14th, 2025 19:21
4K 60 Hz needs 12.5 G/s bandwidth -- double that for two monitors. Those are not Thunderbolt docks, so they won't have the bandwidth to drive two 4K monitors.
Can you get 4K 60 Hz X2 with both monitors connected separately to the two Thunderbolt ports? Note: the third USB-C port is not Thunderbolt.
What GPU does the system have?
(edited)
CarlOB17
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July 14th, 2025 19:48
@ejn63 Thank you for taking the time to reply.
Currently I do not have 2 usb-c thunderbolt to display port compatible cables, I am waiting for them to be delivered for this testing.
To answer your other question about the GPU of the laptop, it has Intel Iris XE Graphics and a Nvidia RTX A2000
GeneG33433
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July 15th, 2025 00:07
I am running 7780 and 7550 thru 2 WD19DCS and 2 28" Samsung monitors with the resolution of 4k 60hz and 4K 30 hz, no problem.
My power supply on both WD19DCS is 240 W each.
(edited)
David wiliiams
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July 15th, 2025 11:10
Although the WD19S and WD19DCS docks may not have sufficient DisplayPort bandwidth to support two 4K @ 60Hz outputs simultaneously, particularly through DisplayPort 1.2 or constrained USB-C lanes, your Dell Precision 5570 is technically capable of supporting two 4K monitors at 60Hz. Due to bandwidth limitations, these docks frequently reduce resolution or refresh rate, even with the newest drivers and high-quality DP1.4 cables.
The WD22TB4 (Thunderbolt 4 dock), which offers a higher video bandwidth and is completely compatible with the Precision 5570's Thunderbolt 4 ports, is the suggested choice for reliably achieving dual 4K @ 60Hz. It's more likely to succeed without compromising, even though it requires a larger investment.
GeneG33433
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July 15th, 2025 15:07
@David wiliiams WD19DCS are dual USB-C connections to Precision Workstations.
I did not see WD22TB4 with dual USB-C, just singele one.