Better upgrade 770 GTX or 3570k/3770k?

[terranrus]

Hello my current build consists of the following:

CPU - i3-3240
GPU - MSI Twin Frozr 660 GTX
PSU - TOPOWER TOP- 500W ATX 12V v.2.3 -80 PLUS Bronze Certified
RAM - 4GB Kingston DDR3 1333
MOBO - ASUS H61M-A -LGA 1155 Intel H61 - Micro ATX
OS - Windows 8.1
Monitor - ASUS VE247H 23.6" 1080p capable

I have two questions:

1) I would like to know which would be the better upgrade path to give me an immediate boost in frames rates.

a) Upgrade current CPU to i5-3570k or i7-3770k
b) Upgrade GPU - to MSI Twin Frozr 770 GTX

2) If I need a new PSU for either upgrade (or both eventually) could you please give me a recommendation for a PSU with sufficient wattage and voltage.

I currently play games at 1080p often times without any AA because at 1080p I personally can live with minor jagginess I see and I like a "sharp" image. Also I tend to play without AO and reduced quality shadows to keep my frame rates as close to 60 fps as possible.

I only have cash currently for 1 major upgrade at the moment, so which would be best for what I want?

Thank You!

 

[rolli59]

With your current board that does not overclock I would upgrade to I5 3350P, it will still run on current PSU which would not run the GTX770.

 

[AxlFone]

I have two questions:

1) I would like to know which would be the better upgrade path to give me an immediate boost in frames rates.

a) Upgrade current CPU to i5-3570k or i7-3770k
b) Upgrade GPU - to MSI Twin Frozr 770 GTX

Best is if you get both. But i3 limits framerates so i5 is now good buy. Later you can uppgrade GTX 770 or 780.

2) If I need a new PSU for either upgrade (or both eventually) could you please give me a recommendation for a PSU with sufficient wattage and voltage.

PSU is not maybe best one so here is cpuple better psu.
http://pcpartpicker.com/part/rosewill-power-supply-capstone550m
http://pcpartpicker.com/part/evga-power-supply-120pb0750kr

And best non OC cpu is Xeon 1230V2 for your build.
http://www.cpubenchmark.net/cpu.php?cpu=Intel+Xeon+E3-1230+V2+%40+3.30GHz