With 80MHz channels configured (160Mhz are possible, but I do not need/want that) on the 5GHz band, I can get about 480Mbps TCP bandwidth over the air using iperf3. Client is a laptop with Intel Wireless 8260 running GNU/Linux.
Reports on the OpenWrt forums I've seen range up to ~800Mbps.
I use one on my full-duplex gigabit connection and it generally sits in the 800-900 Mbps range. This will vary depending on things like if you decide to enable smart queue management (SQM) or other features.
More important to me, how stable is it? My WRT3200ACM has good peak bandwidth, but it can't deal with interference of other routers and needs to be rebooted frequently.
The WRTx series has a broken driver that got nixed after NXP bought out Marvell
My WRT32x will randomly have its 5Ghz AP just seize up once every week or two and require a reboot. I'm slowly working up the willpower to replace the thing
Yeah, I have found x86 openwrt wired router + AP (currently, Ruckus R710), to be a good combination. Don't mind getting an openwrt AP if it beats Ruckus, but I find that to be a high bar.
Are there any devices with good Wifi (6) support? Last time I bought an expensive router with advertised OpenWRT support and the wifi was horrendous.