Solved Gaming Rig not running its potential. Help!

Hey Everyone, im looking for someone who knows a lot more than I do.

Heres whats going on:
I have a gaming rig with a Radeon r9 270 GPU, Intel Pentium g3470 3.6ghz cpu, 16 gb ram, and a benq 60hz monitor.
Sometimes when I boot my computer to run CSGO i will have 30-40fps, and other times i will be in the 100-130 range. I know i have a 60hz monitor but having higher fps seems to minimize screen tearing and makes everything run smoother. I have to restart my computer 3 or 4 times before it gets to the normal fps range which can be .... frustrating.

Questions:
Am I bottle necking myself? Is there one specific part to my computer I should look to upgrade rather than completely rebuilding?
Any solution to the inconsistent performance after i boot?
Would getting a 144hz monitor solve all of my problems?
If you had to choose one between the cpu, gpu, and monitor to upgrade, which would it be?

Thanks so much for any reply and I am open to all and any feedback. I have some money to throw around to fixing my problem so i am open to anything.

vger said:

Hello

What OS are you using?

@Evan Omo @Bruce

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Windows 10

Bruce said:

definitely think about a solid state drive to virtually eliminate all I/O bottlenecks.
next thing, and it'll have huge flow-on effects, is your CPU, with only a Pentium chip (socket 1150), that'll be a big limiting factor when play modern generation games on old generation architecture.
but replacing that with an Intel Core i5 or i7 (socket 1151) will force you to also upgrade the mobo and RAM at least.

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awesome, appreciate the feedback