Thanks fellas,much appreciated.

Yes they have differnt purposes.
BOV releases the built up pressure between the compressor outlet and the throttle body (Butterfly). Works when throttle is closed to release this pressure.

Wastegate controls the exhaust gas flow through the turbine. Used to limit the turbo shaft speed which in turn limits compressor output mass flow.

Hahaha, what he said above

a waste gate is set at a pre determined pressure say "7psi" when air pressure on the intake is at 7psi the waste gate opens by passing the turbo with exhaust gas,this stops the turbo increasing boost as it's missing out on the exhaust energy.
two types of gates internal inside the turbo housing run into your dump pipe and external which can be mounted to feed into your exhaust or dump into a open pipe sometimes called a "scream Pipe"
A blow off valve is set to measure vacume when the throttle close it opens releasing boost pressure to atmosphere,it's purpose is avoid compressor stall during gearchanges as the throttle shuts a pressure wave flows back to the turbo.....its meant to keep to turbo rpm up as it slows under load/backpressure
hope this helps
cheers anthony

Most of this can be answered with a quick search on google.

Hi guys im in a mood that makes my want to gain knowledge about wastegates and bovs.My question is,does a bov have a different purpose than the wastegate,and does the wastegate wastes go down the muffler?u here cars that u can here the pressure being released is that the bov or wastegate.