What should I do? Upgrading old gamer computer or buy a newer one?

[Gebaben]

Hi everyone!
I would like to ask what should I replace in my computer, or if to buy a newer one is cheaper then what PC I should buy.

I would like to have a pc that can handle games like: nfs Rivals, The crew, or Skyrim and Dirt 3 on max settings.

My spec:
MB: Asrock 4core1600 glan
GPU: Nvidia geforce 9400 GT
RAM: 4GB DDR2 (2,9GB Usable)
CPU: Intel Pentium Dual Core E5300 2.60GHz
OS: Windows 7 32bit

Approximate Purchase Date: doesn't matter

Budget Range: cheaper is better

System Usage from Most to Least Important: gaming

Are you buying a monitor: No

Parts to Upgrade: CPU, GPU, Motherboard, RAM

Do you need to buy OS: No

Preferred Website(s) for Parts: none

Location: Hungary, Szolnok

Parts Preferences: I would prefer Intel CPU, nvidia GPU

Overclocking: no

SLI or Crossfire: don't know what is it

Your Monitor Resolution: 1920x1080, but in games I set to 1024x768 because the huge lag

Additional Comments: I would like to know if I can upgrade it, without replace motherboard or not, and which component is weak, the weakest.

And Most Importantly, Why Are You Upgrading: for better gaming experience

 

[jimmyEatWord]

buy a newer is always better

 

[geofelt]

Your pc is too old and too weak to do anything with it.

Your E5300 cpu is a dual core/thread with a passmark rating of1548 and a single thread rating of 1052.
The single tread rating is likely most important for your games.

Today, the Intel kaby lake G4560@3.5 is the best budget cpu out there. Unfortunately, the word is out and prices have gone up from the list price of $64.
You might find the stronger G4600@3.6 or G4620@3.7 with stronger HD630 graphics to be a better deal.
G4560 has 4 threads and a passmark rating of 5100 and a single thread rating of 1992.

Your 9400GT is, as you know, very weak.
Perhaps a dozen tiers lower than the integrated HD610 graphics of the G4560.
Here is toms gpu hierarchy chart.
http://www.tomshardware.com/reviews/gpu-hierarchy,4388.html
My suggestion is to start and use the integrated graphics and see how you do.
My guess is that you will want to install something stronger like a GTX1050ti.

You did not name your PSU, but if it is of decent quality, you can reuse it, even with a GTX1050ti.

You might also be able to reuse your windows 7 32 bit license.
You can reuse the key to reinstall the 64 bit version.

The motherboard and ram will need replacement.
You will want a lga1151 motherboard. Motherboards with H110 chipset are cheapest will work so long as they have a current bios to support kaby lake. Verify that the bios is present, or you will need a 6th gen cpu to do the update.
If you have any doubts, look for a B250 based motherboard which will work out of the box.

8gb of DDR4 ram is about right. You will want a 2 stick kit, particularly for faster integrated operation.

You did not list your hard drive, and, I suppose it could be reused.
But...

I will never again build without a ssd for the "C" drive. It makes everything you do much quicker.
120gb is minimum, it will hold the os and a handful of games.
But, many things default to the "C" drive.
When a SSD nears full, it will lose performance and endurance.
240gb is the recommended minimum.

Samsung EVO is a good choice for performance and reliability.

You can repurpose your hard drive for bulk storage.

In time, the lga1151 motherboard can support upgrading to a processor as good as a I7-7700K

 

[YoAndy]

Like others have stated you are better of buying or building a new computer.

 

[Gebaben]

Thanks you guys for the fast reply. I will looking into a new computer build.

My hard drive: Samsung HD322HJ
My Power supply: Corsair CX430

Can you recommend a better power supply (if needed) to the components geofelt said?
Are those components are compatible with eachother?