Ethereum is so slow in my pc

[finaleshot2016]

I have a problem in my pc because when im having a transaction, it is very slow and i always wait 8 hours to complete a 1 transaction. Later on, I realize to have a transaction on different ip then it was very fast. My internet connection is okay because i always have a transaction with this kind of speed. what do you think is the problem

[chicobr]

? do you use myetherwallet. how many gas you set? gwei? I usually set 21 gwei so my transaction under 1 minute