Question Looking for help in upgrading my PC

Aug 7, 2019
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Hello!

As I don´t know about computer building much, I thought that I´d better ask someone smarter. I have a PC (MSI MS-7808), which I would like to upgrade to higher performance. Like a new graphics card, memory etc. I´d like to know, is it worth upgrading and if it is, then what is compatible with my PC. The graphics card right now is AMD Radeon HD 7700 Series, the processor is Intel Core i3. I don´t know how to give any more information about my computer, so I would be very thankful if someone could assist me with that.

EDIT: I have all The Sims 3 expansions and the main thing is I´d like the computer to run it smoothly on the highest settings.
 
Aug 7, 2019
2
0
10
Windows edition: Win 7 Enterprise
Processor: Intel(R) Core(TM) i3-3240 CPU @ 3.40GHz
Installed memory (RAM): 8GB
System type: 64-bit