Your speeds are on par with similar hardware just like the others have pointed out. A little to late to the party though..
so it is not worth spending money on upgrading my rig?
i won't earn any money?
is that what you are saying?
and the price of btc is droping
what would you advise
Unless you're going to upgrade your rig for gaming, rather spend the money on buying some coin directly. Even if you have free power, it's almost impossible to mine anything of value... with the exception perhaps of Vertcoin or other ASIC-proof coins.