Let me get this straight, you bought a router without any research, a very old model at that.
Good questions to ask
prior to purchasehere at the forum.
As per the below diagram the best one could hope for under ideal conditions is around 860Mbps, under 25 Filter rules its down to about 250 Mbps and somewhere between the two 42 5Mbps. Thus your results are exactly as expected and what most get out of the router.
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cue the usual liars that come on that boast about 1gig speeds they get,,, just ignore them!
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realworld.jpg
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