Upgrading very old PC

I'm thinking about upgrading my very old desktop to play modern games like arma or battlefield and settings don't really matter (I'm used to minimum with this old 915gm).

Here are my current specs:
MOBO: Dell OKF623
MEMORY: 1 gb
OS: Windows XP SP2
CPU: Pentium 4 3.00Ghz
Chassis: mini tower

This week i'm thinking of replacing my motherboard and graphics card with these
Graphic Card:
(I'm upgrading my PSU later when I have more cash so the GPU is no problem.)

I'm only worried that these wont be compatible. I haven't ever built or upgraded a PC so help is needed. Also, if the chassis is too small I already willing to buy a mid tower I have my eye on.

Also I will be upgrading my RAM as well in the future:

Reason why I don't just wont to buy another new PC is because I don't like the custom PC brands and I'm trying spend as little as possible.
5 answers Last reply Best Answer
More about upgrading
  1. If you're going to upgrade, IMO you should just upgrade. What's your top budget?

    You'll see an improvement with what you've picked, but you may have some problems with that MB. Seems like it's got a pretty bad layout, with at least one SATA port buried under the GPU.
  2. Hiya,

    You can't replace your motherboard that easily. Your current CPU will not work with the new motherboard. Your current RAM will also not work. Different sockets.

    As to the board fitting into the current case, I would need to know more about the current case.
  3. Best answer
  4. Ok thanks, I'll be sure to do that. I realize now that its a lost cause upgrading ha. Thank you again.
  5. Best answer selected by Tubbs.
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