Slow Wifi with brand new Surface Book 2!!!

I had the same problem, really slow WIFI connectivity even when I was only a few meters away from the WIFI router. Additional finding: when opening Control Panel | Network and Internet | View network status and tasks | Connections | <wifi name> | Wi-Fi Status, the connection details show a really slow Connection Speed (like 11 Mbps or 19 Mbps) instead of the normal speeds over >> 100 Mbps.

I solved the issue by changing the WMM Power Save setting of the Marvell Wi-Fi Adapter: change the value under Device Manager | Network adapters | Marvell AVASTAR Wireless-AC Network Controller | Advanced | WMM-PS from Optimized to High Performance. After changing the setting, the Connection Speed went up to 130 Mbps within seconds. And it stayed high.

Ok, i have this same problem, im on unit number four over a timespan of about 6 months, i tried a Surface Pro 6 in between and had the same issues, this is something with the WIFI card in the Surface Pros and SufaceBooks, heck probably all the Surface laptops...

I'm using a crystal clean Unifi system at my house, i have 1GB/1GB fiber coming into to a Unifi Security Gateway, then into a Unifi Switch then going to 3 Unifi AC HD Pro's.

Keep in mind when i plug hard wired into my switch i get above 1GB/1GB...

I pull out my Note 9 i get 300-500 down and 300-500 up every time, i pull out my other laptops and i get 200-400 up and down, ONLY the Surface laptops have this ridiculously slow WIFI speed issue.

Luckily i use mine mostly for office apps and i love the screen so i have decided to keep it.  I just hate hearing people offer advice and start asking about your router and this and that, its a problem with the Microsoft machines people, either get a USB WIFI adapter or deal with the slower speeds.

Hi, 

I experience the same problems

1GB optical fiber connection (Netherlands)

Wireless I have approx. 25 mbps / down / 30mbps / up

Solution that helped me:

1. Turn off Bluetooth

speed went up to 45 / mbps / down / and 35 mbps / up

2.1) Wifi Adaper settings, (Marvell AVASTAR Wireless-AC Network Controller)

Go to configuration, advanced, band

Select the desired bandwidth (2.4 ghz or 5 ghz) only!

2.2)

Select WMM-PS and select high performance.

Speed went up to 80 mbps / down and 35mbps / up

(what can be expected)

Unfortunately it is therefore not possible to use bluetooth and wifi at the same time, rather strange for a 3K+ laptop.

Seems like a driver update is needed!

So I had this issue with the Surface Book 1, same Marvell AVASTAR Wireless-AC Network Controller as the Surface Book 2. Intermittent connections on a 200 Mbps connection down to 58 Kbps, usually hovering around 10 Mbps at best.

Meanwhile a work Dell Latitude 5580, not to mention my phone and other devices, were connecting at between 160-220 Mbps. Extremely frustrating. I finally went to the local Microsoft Store in Honolulu and they saw the same thing; got a replacement and then IN STORE showed the same problem. Then I got an upgrade to a Surface Book 2 for my troubles (which was certainly nice!) and that showed good speeds out of the gate but then went back to the old ways of intermittently slow, and occasionally dropped, connections on my home router.

Tried most of the solutions in here, reinstalling drivers, 5G only, etc. In the end my "fix" is that I bought a Netgear A6210 WiFi USB Adapter and plugged it into the bloody thing, so now I get full speed. But it's absolutely absurd that my solution to this is a USB WiFi dongle.

Love Microsoft's customer service, even the agents I've contacted remotely really tried to dig into what was going on, but between this and losing two Surface Book 1s to bulging batteries their hardware isn't impressing me much.

Same issues: added a Netgear Nighthawk adapter to my SB2, now getting the performance that I should have been getting all along, but at even more expense.