Upgrade questions - GPU+(CPU/PSU)

This was probably asked a lot times already, and I've tried compile information - and of course, I've came to no conclusion, so, as a last resort, I decided to ask here. Sorry! ;)

So, I'm want to future proof my build (ang get rid of the lags on 3rd display), currently I have: Phenom II x4 925 (@3.14, with aftermarket cooling), GF GT 550Ti (2 displays - 1680x1050), GF 8400 PCI-Ex1 (1 display - 1680x1050), SSD, 3 HDD, 8GB DDR3 ram (3 sticks), Chieftec GPA-500S8 (500W, 80+? - this is not consistent, I live in Europe and have 230V in my wallplugs).

I have around $600 to spend. I mostly game on this PC (with some simulation work from time to time). I am not going to change motherboard and displays soon.

And, here are my questions (and things I was thinking I could upgrade):
  • Is changing my GPUs to Radeon 7970 or GeForce 770 worth it? From what I read both are able to drive 3 displays, and should give me nice performance boost (possibly gaming on all three displays). My problem is that two of my displays are VGA only, and one has DVI - and from what I read I would need to a) buy active DP-VGA adapter for Radeon 7970. This would cost me around $560b) just connect them to GeForce 770. This would cost me around $500
  • Is bumping ram from 8GB to 16GB worth is these days? (Around $80)
  • Is upgrading my CPU to FX-8XXX worth it? FX-8XXX series processors start from $130
  • 3 answers Last reply Best Answer
    More about upgrade questions gpu cpu psu
    1. If you're trying to future proof with AMD, get the FX 8350.
      Also if you want to squeeze a little more life out of your potential gpu by overclocking, ignore the 770. It's pretty well just a superclocked 680.
    2. Best answer
      1. When connecting 3 monitors or more, only two of them can use VGA/DVI/HDMI, after using 2 you can only use display port/mini display port. So you will need a display port to VGA/DVI to connect to your monitor.
      2. Nope.
      3. The FX series processor uses a different socket (AM3+) than your Phenom II x4 925 (AM3).
      4. Yes

      The best upgrade you can do is grab a GTX 770 ($400) and grab a display port to VGA/DVI (~$20).
      Then upgrade your psu to the XFX 650w:
      After that, I would save up for a FX-8350 / FX-8320 + 990X / 990FX / 970 chipset motherboard and overclock it.
    3. Hi,
      @realchaos - thanks a lot for an answer! I asked about CPU because I recently bought a replacement motherboard (GA-970A-D3 rev. 1.3) that supports FX cpus. As for the rest points:
      • I can't find this XFX PSU in shops in Poland, but I found good quality Polish OEM 650W PSU with 80+ Bronze rating with good reviews. So, does this "80+ Bronze" badges mean anything, and I will be good to go?
      • I'll go with this GT770 + DP-VGA adapter - but does nVidia has the same "active adapter" bull---- that AMD has? Or, as I read somewhere, DP-VGA adapters are all "active"

      Thanks a lot again!
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