Are you stupid enough to put 32 Bit on a Hex core with 4GB of ram?
Come on mate, you're practically throwing your money down the drain.

Also, 80MB/s is VERY fast.
The 1GBit dedi you were using has RAID0 or similar, hence the crazy speeds. Also, RAID0 is highly unstable (kind of like FSO's servers )
If you want faster copy speeds, I suggest you go for RAID10.

PS: You don't need faster copy speeds than 80MB/s unless you're a scene/p2p encoder.

Regards