I've been speaking with a number of other friends/family/colleagues that also picked up Surface P3s on Day 1 and they seem to be having the same issues. 802.11ac compatibility seems to be the worst, but even 802.11n speeds seem to be worse than other stable devices.
Try downgrading the driver.
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This fixed issues for me. Using 802.11n on the newest driver, I was seeing speeds around 8mbps. I am now seeing full speed again with the 4/24 driver.
As I have mentioned a few times to people in this thread already, I know its 37 pages for new folks so could someone sticky this "workaround"
I guess I'm wasting my breath. I too have asked around and found 4 people with a SP3 who are all IT professionals with 15+ years of experience, like me, that know what they are talking about. Not one of them found better actual throughput with the old driver, just a better link speed. A nice, shiny placebo.
8mbps? Link or throughput? How are you measuring? ...are you just reading the speed in the WiFi Status window? I haven't read all 37 pages of this, just the first and last few, but has anyone actually measured throughput?
So, that's 5/5 people that found the old driver is not really any better in terms of throughput, but I know it's less stable in terms of connection reliability.
Marvall and Microsoft just need to fix this. In the meantime, we need to be patient and put up with less than ideal WiFi speed. Faffing around with drivers doesn't help.
I have stated before in this thread which machine I have, what speeds I get (transfers, not link speeds) and what router I have, and what settings. I would be willing to post again MY setup that works for me. It is NOT perfect and should be faster, but this is better than trying all those useless firmware updates which always made my system worse.
I agree, Marvell and MS need to get their thumbs out and fix this problem and unlock the power mgmt. to end users as well. (not just by using PowerShell or CLI scripts either as we do now).