in my country they don't sale gpu's like gt630 or 730 or 1030 (btw they have g210 and gt710 and i don't like it)
just high end graphics that's all
Well, it would be best to move to a newer generation cpu. Lga 775 i think is 3rd gen and below right? For intel at least.
You can get cheap mobos that are compatible with LGA 1150, 4th gen intel processors. Not only do you spend a little amount of money considering they are cheap, but the performance gain compared to what you have now would be remarkable.
Basically what I'm saying is, it's 2021, and I just upgraded from an i3 4150 8gb ddr3 system to an i5 4690 32gb system. And from my standpoint, I already considered the i3 4150 to be "obsolete". So the best thing to upgrade for you now, truthfully and frankly, is your entire system.
I mean no offense, but socket 1150 board can go as low as 15-20$ USD nowadays, pair that up with a $20 USD i3 4th gen processor, or even an i5 4th generation such as a 4440 or 4460. You can find those for as low as only $30-$40 USD. Pair that up with cheap $10 4gb ddr3 ram, the performance per dollar ratio would be pretty good. Although I dont recommend 4gb ram nowadays.
I am by no means an expert on this. This is just my opinion, or rather this is how I would do it if i were in your position.
Trust me, try to spend a little on improving your system. It'll take care of you for possibly 2-3 years.
As for GPUs, I see some GTX 560 ti's retail for about $20 USD also. All these components would cost you prolly less or equal to $100 USD.