RT-N66U w/ Shibby 1.32 cutting Internet speed in half

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wazooda
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RT-N66U w/ Shibby 1.32 cutting Internet speed in half

Post by wazooda » Fri Feb 05, 2016 7:56 pm

Hey all,

Cox Cable recently upped my Internet speed to 300mbps.

When I connect directly from a PC to the cable modem, I get the full 300 (and then some).

However, once I put my router right behind the modem, all my speed tests get knocked in half to 150mbps.

I tried removing everything else from the router and shutting off wifi and then ONLY connecting my PC to the router to eliminate all other variables and the problem remains.

This is an ASUS RT-N66U running the latest Shibby firmware.

Any ideas why this is happening?

Thanks in advance!
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mstombs
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Joined: Wed Jan 10, 2007 11:54 pm

Re: RT-N66U w/ Shibby 1.32 cutting Internet speed in half

Post by mstombs » Sat Feb 06, 2016 2:36 am

If you check 'top' during a speedtest you should find the CPU in the router maxed out (softirqs?). You can get much closer to your ISP speeds with Asus Asuswrt-merlin fimrware with Broadcom CTF fast nat code enabled, which means various ip accounting and features not enabled. Newer multicore ARM routers have more powerful CPUs
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