Asus TUF-AX5400 slow VPN speeds

D76

New Around Here
Just got the Asus TUF-AX5400, replacing an Asus RT-AC86U (which I'm now using as a node in Amish). On both the stock firmware and Merlin (Gnuton) the OpenVPN speeds on the AX5400 are much slower than the speeds I was achieving on the AC96U on exactly the same VPN servers. I would normally be able to get speeds of 150mbps+ on many ExpressVPN and Surfshark servers. Now the quickest I'm getting is around 50mbps. Are there any setting I need to change? QoS is off, as is AiProtection and Traffic Analyser.
 

Tech9

Part of the Furniture
RT-AC86U has faster 1.8GHz ARMv8 CPU cores with AES (Advanced Encryption Standard instructions set). It can do >200Mbps on OpenVPN. TUF-AX5400 is one of the many "gaming versions" of entry level RT-AX58U base hardware. It has weaker 1.5GHz ARMv7 variant CPU cores with no AES support. OpenVPN uses a single core. What you see is expected and normal. You have downgraded your router in regards of CPU.
 

D76

New Around Here
RT-AC86U has faster 1.8GHz ARMv8 CPU cores with AES (Advanced Encryption Standard instructions set). It can do >200Mbps on OpenVPN. TUF-AX5400 is one of the many "gaming versions" of entry level RT-AX58U base hardware. It has weaker 1.5GHz ARMv7 variant CPU cores with no AES support. OpenVPN uses a single core. What you see is expected and normal. You have downgraded your router in regards of CPU.
Thanks. I’ve obviously made a mistake in not checking the CPU versus my old router. Will have to return it and look again. Wanted similar VPN performance but with Wi-Fi 6
 

Tech Junky

Very Senior Member
@D76
The real question though is what speed are you paying for? If it's more than 150mbps then looking into gear suited for higher speeds or wireguard would be a better option than buying another Asus.

When I was on a gig plan my DIY setup hit wire speed using WG. I switched providers though and cut the bill by 50% and don't really miss the gig speed all that much. My DL's typically only hit about 50% of that anyway regardless of the speed / capacity of the line. On occasion with high bandwidth servers though I could max it out but, it was typically for drivers only and not really anything that mattered. If you really need the speed you're paying for then consider building something to handle the full speed of your connection but, I suspect since you're using consumer VPN's it's just day to day surfing and DL's which isn't the same as someone moving GB's of files between sites.
 

Tech9

Part of the Furniture
Wanted similar VPN performance but with Wi-Fi 6

Closest direct replacement for your RT-AC86U + Wi-Fi 6 router is RT-AX86S. A step up is RT-AX86U.

Look for 1.8GHz or 2.0GHz dual/quad core CPU in specifications. This is a good indication for ARMv8.
 

D76

New Around Here
@D76
The real question though is what speed are you paying for? If it's more than 150mbps then looking into gear suited for higher speeds or wireguard would be a better option than buying another Asus.

When I was on a gig plan my DIY setup hit wire speed using WG. I switched providers though and cut the bill by 50% and don't really miss the gig speed all that much. My DL's typically only hit about 50% of that anyway regardless of the speed / capacity of the line. On occasion with high bandwidth servers though I could max it out but, it was typically for drivers only and not really anything that mattered. If you really need the speed you're paying for then consider building something to handle the full speed of your connection but, I suspect since you're using consumer VPN's it's just day to day surfing and DL's which isn't the same as someone moving GB's of files between sites.
Not looking for any heavy lifting from a VPN perspective. VPN speeds of around what I was getting on the old router will be enough
 

D76

New Around Here
Closest direct replacement for your RT-AC86U + Wi-Fi 6 router is RT-AX86S. A step up is RT-AX86U.

Look for 1.8GHz or 2.0GHz dual/quad core CPU in specifications. This is a good indication for ARMv8.
Cheers. Been looking at both those now, I think they’ll be fine for what I need
 

Tech9

Part of the Furniture
Go for RT-AX86S, if you don't expect or need >Gigabit ISP speeds. It's basically improved RT-AC86U with Wi-Fi 6 radio. There is a cheaper one RT-AX68U with the same CPU, but it has too many connectivity issues mentioned all over Internet and it's not very popular here on SNB Forums.
 

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