I have an Dell Inspirion 570. This computer comes stock with a 300 watt PSU, AMD Athlon II X2 250 Regor processor, 4 GB of RAM, and a 500 GB HDD. I've added in a Geforce GT 430 from a previous build already. I'm looking to upgrade the power supply unit, because I need to add in a new processor and hard drive. So, what PSU should I get, what processor should I get (this model only accepts AM3+ sockets), and what video card should I get? Also, do I need a new fan for this processor, or can I use stock. Also, I would prefer for the PSU to be under 70 dollars, the processor to be under 130 dollars, and the video card to be under 150 dollars. If you are going to suggest a fan, it would have to be under 40 dollars.
I can't find an internal shot but based on the size and back I will guess it's a standard ATX layout. I think you meant AM3 CPUs and not AM3+ CPUs. The chipset is 785G, which would suggest this board can't handle an FX6300, for instance.
Sorry, I probably meant AM3. I'm not proficient in technology, with probably a 2 or 3 on a scale from 1-5. According to kisianik on the dell forums, he said 125mm fans wouldn't fit in the stock case, so would a 92mm fan fit and work well? What is the standard ATX layout? I was confused there. Again, sorry for my lack of experience. My only hands on experience was building one desktop back in 2009. Also, would a 500W PSU work instead of 520W. I'm on a pretty tight budget, so having a even slightly cheaper PSU helps.
No, that PSU is junk. see the PSU guide linked in my sig. Maybe the case isn't wide enough for a 120mm fan? You are going to have to cut a hole though. He may be talking about the fan mount that already exists in the back. I'm saying you need that one AND one in the front.