Massive drop in transfer speeds on WLAN

[Terrier_Jimlad]

Evening folks,

I often transfer single files ranging from 20GB to 45GB from my main rig to my second rig which used to be hard-wired in to the router using it's 1Gbps card. I've had to re-locate the second rig upstairs in the spare bedroom, no way of hard-wire/powerline so I purchased an wifi 6 card capable of similar speeds or more and this connects at around 2.2Gbps on the 160Hz channel. When the rig was hard wired, I could transfer the files at it would transfer at an expected 112mb/sec from start to finish, no problem. Since putting the machine on the wireless card, it starts the transfer around 150mb/sec to 200mb/sec and stays like that until the first 3GB is copied, and then the transfer rate plumets down to 5mb/sec and stays like that for the remainder of the transfer, which as you can imagine is frustrating.

Is there some kind of buffer with wireless cards that just cause it to drop like I am experiencing? Is there any of the wireless properties I could try changing to help? I bought a decent Intel card thinking I would have these issues. Switching off/disabling AV/FW on both rigs makes no difference.

More detailed spec/speeds of each device associated below:

Router: RT-AX86U (Wi-Fi 6 - 5GHz sat on 160MHz on Channel 64 (no other interfering channels)

Main Rig: 2.5Gbps LAN using an Intel I225-V (latest drivers) hard wired to router using Cat6 (around 15m) connected to 2.5Gbps port on the AX86U
i9-10900k/32GB/512GB Samsung 970 Evo (read last tested at 3544MB/s)

Second Rig: 2.2Gbps WLAN using an Intel Wi-Fi 6e AX210 160Mhz PCI-E card, using latest drivers, on floor above router, probably 10m direct distance
i5-10500/8GB/2TB Crucial BX500 connected via SATA3 (write last tested at 400MB/s)

 

[Disco_P]

Evening folks,

I often transfer single files ranging from 20GB to 45GB from my main rig to my second rig which used to be hard-wired in to the router using it's 1Gbps card. I've had to re-locate the second rig upstairs in the spare bedroom, no way of hard-wire/powerline so I purchased an wifi 6 card capable of similar speeds or more and this connects at around 2.2Gbps on the 160Hz channel. When the rig was hard wired, I could transfer the files at it would transfer at an expected 112mb/sec from start to finish, no problem. Since putting the machine on the wireless card, it starts the transfer around 150mb/sec to 200mb/sec and stays like that until the first 3GB is copied, and then the transfer rate plumets down to 5mb/sec and stays like that for the remainder of the transfer, which as you can imagine is frustrating.

Is there some kind of buffer with wireless cards that just cause it to drop like I am experiencing? Is there any of the wireless properties I could try changing to help? I bought a decent Intel card thinking I would have these issues. Switching off/disabling AV/FW on both rigs makes no difference.

More detailed spec/speeds of each device associated below:

Router: RT-AX86U (Wi-Fi 6 - 5GHz sat on 160MHz on Channel 64 (no other interfering channels)

Main Rig: 2.5Gbps LAN using an Intel I225-V (latest drivers) hard wired to router using Cat6 (around 15m) connected to 2.5Gbps port on the AX86U
i9-10900k/32GB/512GB Samsung 970 Evo (read last tested at 3544MB/s)

Second Rig: 2.2Gbps WLAN using an Intel Wi-Fi 6e AX210 160Mhz PCI-E card, using latest drivers, on floor above router, probably 10m direct distance
i5-10500/8GB/2TB Crucial BX500 connected via SATA3 (write last tested at 400MB/s)

Have you got another drive to write too in the 2nd system? Or could you test a file transfer to other way?

 

[Avalon]

Isn’t the BX500 a QLC drive that uses some of its NAND as TLC cache? Depending on how full it is, it sounds like you are running out of free NAND for it to use as buffer and writing direct to QLC. That will be slow. It’s not a drive that is suited to the workload you have given it.