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Basic75

macrumors 68000
Original poster
May 17, 2011
1,825
2,069
Europe
My M1 Mac mini is in the same room as my Wifi router, distance is 2m (that's like 6.5ft in the weird units).

My router is set up with different SSIDs for 2.4GHz and 5GHz and supports 802.11ax, the mini is always connected to 5GHz.

Sometimes the Mac gets the expected 1200Mbps link, sometimes it will just stay at 300Mbps, seemingly without reason, and will just stay there.

I'll get an Ethernet cable set up soon anyhow, but wanted to ask whether anybody knows how to fix this in the meantime as the low speed can be a bit annoying.
 

Basic75

macrumors 68000
Original poster
May 17, 2011
1,825
2,069
Europe
Digging deeper it's stuck at MCS Index 15 which is 802.11n, with 2 streams that gives me the 300. Which is inconsistent with the Phy Mode listed as 802.11ax. And it doesn't explain why I can't consistently get a 1200Mbps link, not even from so close to the router.
 

Fishrrman

macrumors Penryn
Feb 20, 2009
28,101
12,250
I know my reply doesn't solve the wifi problem, but...
Just connect via ethernet and be done with it.

One thing to try in the meantime:
Open the network settings
DELETE the existing entry for wifi
Reboot, then...
Create a NEW wifi connection.
(no promises)
 

MRxROBOT

macrumors 6502a
Apr 14, 2016
785
814
01000011 01000001
My M1 Mac mini is in the same room as my Wifi router, distance is 2m (that's like 6.5ft in the weird units).

My router is set up with different SSIDs for 2.4GHz and 5GHz and supports 802.11ax, the mini is always connected to 5GHz.

Sometimes the Mac gets the expected 1200Mbps link, sometimes it will just stay at 300Mbps, seemingly without reason, and will just stay there.

I'll get an Ethernet cable set up soon anyhow, but wanted to ask whether anybody knows how to fix this in the meantime as the low speed can be a bit annoying.
Curious, what router are you using?
 

Basic75

macrumors 68000
Original poster
May 17, 2011
1,825
2,069
Europe
I know my reply doesn't solve the wifi problem, but...
Just connect via ethernet and be done with it.

One thing to try in the meantime:
Open the network settings
DELETE the existing entry for wifi
Reboot, then...
Create a NEW wifi connection.
(no promises)
For now I tried changing the wifi channel. If that doesn't help I'll try this. Ethernet is coming soon, I just need another switch.
 

mavis

macrumors 601
Jul 30, 2007
4,729
1,446
Tokyo, Japan
My M2 Mac Mini's wifi speed is highly erratic (in the same room as my router; speed fluctuates between 866Mbps and <100Mbps). I "solved" this problem by using ethernet, but in my case, at least, the problem seems to be interference from neighboring wifi networks.

Edit: I posted about it here
 

MacCheetah3

macrumors 68000
Nov 14, 2003
1,991
990
Central MN
My Mac mini is ~3m from my router, also a telecom provided access point — which equates to limited adjustments/tuning. Furthermore, maybe relevant, my Mac mini is vertically standing.

Mac-mini-M1_WiFi_info.jpg

I counted 37 other networks (in range) — I live in an apartment building.

The link speed is seemingly accurate, according to this table:


For now I tried changing the wifi channel.

Lastly, I don’t know if it provides any additional details, but perhaps you could try creating a diagnostics report:

 
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