I have problem with a 500/50 bandwith that only i get 200mbps on speed test on a client pc of hex S directly on isp router i get all the speed .any idea ? isp on ether 1 --- Lan on ether 3

ps . with bandwith test tool inside mikrotik i get all the speed 500/50

Please check if this is not a cable issue (check for negotiated speed on port) or You need better device like RB4011 or RB5009 if you need SFP interface, otherwise you can opt to choose hapac2 at least for less pricey option

Please see MT test result page

You cloud also check the Profile Tool. Go to Tools -> Profile -> Select "all" by CPU and press start. Then run your speedtest and it will show you how much your cores a loaded by specific applications.