Should i upgrade my gtx 970?

[eseakiba]

Hello everyone, i've got my computer for about 2 years and im wondering do i need upgrading yet?
My specs:
-intel i7 4790k
-16gb ddr3
-gtx 970 asus OC 4gb
-cooler master 700w b2 series PSU ( https://eu.coolermaster.com/uk/powersupply/office-home/b700ver2/ )
-gigabte z97 motherboard
- HDD 1gb...

I wanted to change my gpu to 1070 TI (do i need more powerful supply?) and add SSD... wiil it be enough? I play every type of game, especially moba and fps games ( im using 144hz monitor)... or do i need to buy whole new computer? Thanks for the help!

 

[Eximo]

CPU is fine for another several years.
Plenty of memory.

GTX 970 could be replaced, but if it is doing what you want it to, then there is no immediate need. Certainly a 1070Ti would be nearly twice the performance.
Power supply is probably fine if it has lasted this long running a GTX 970.

Can't go wrong with an SSD, really improves Windows responsiveness. And if you care about game load times, games on an SSD load much faster.