Wow, that’s surprising…most laptops from like 2010 onwards have done 5 GHz. Did yours have a particularly old Wi-Fi card in it?
My late 2013 mbp has it and I discovered the other day that it can actually negotiate up to around 1 Gb/s.
On the other hand, I have an HP ProBook 430 G2 lying around the office. I don't know when it was bought, but it has an i5-4210U which according to intel was launched in Q2 2014. So the laptop must be from late 2014. It has a Realtek RTL8723BE PCIe wifi card which doesn't know about 5 GHz. It works acceptably well otherwise.
https://www.dell.com/en-us/shop/2-in-1-laptops/inspiron-11-3...
TBH, in the future I'll preferentially opt for ~96 DPI when available. The 3200x1800 on my other system is completely overkill, and doesn't play particularly nice with a lot of websites or Steam.
The only place I run into trouble is if I try to do anything work-related on this laptop because our web design team designed our web app on large, high-density displays.
Every website I actually use at home works perfectly fine.
Actually it was only with 802.11ac (AKA WIFI5) that laptops started universally supporting 5GHz on the high and low end.
Before that you had to check the spec sheet.
In fact, it's still common for IoT devices to forgoe 5GHz, but it's becoming less common, thankfully.
From lspci:
03:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)
I don't know whether that is an old card or not. I think the laptop was in the $300-$400 range when we got it. Inspiron 15-3551, came with Ubuntu pre-installed, which has since been swapped out for Debian.
This Dell support link [1] seems to confirm that it is 2.4Ghz only.
[1] https://www.dell.com/community/Networking-Internet-Bluetooth...
