Re: Old PC Upgradation
Let me go over what looks like a few mistakes in this thread and make suggestions:
This motherboard is absolutely fine and will take anything from a low-end Pentium to a high-end i7. No need at all to upgrade it.
The i3 will suffice for most (if not all) gaming. If it becomes a problem, upgrade to an i5 later, but leave it alone for now.
The RAM is DDR4 so if you upgrade this, you're looking for a pair of DDR4 modules, probably 2x4GB if not 1x8GB.
You'll want to look at upgrading the graphics card, the Nvidia GeForce GTX970 is great, especially if you want to poke your nose into 4K resolution gaming, if not then a Nvidia GeForce GTX960 will probably suffice for 1080p at the moment. This may also mean you have to upgrade your power supply....
In terms of power supplies, you can't go too far wrong with a SeaSonic or Corsair. Anything upwards of about 500W should be fine.
As far as getting an SSD goes... I'd go with Biker's recommendation of the Samsung EVO 850 series. Pick the size based on budget, but I think the 250GB is fine for most people.
Athlon II x4 645 || 1TB 7200rpm HDD || EVGA GTX 650Ti OC || 8GB DDR3 RAM || Windows 7 Home x64
i5 4210M || 500GB Samsung EVO 850 SSD || GeForce 825M || 16GB DDR3 RAM || Windows 10 x64