I am looking to upgrade the motherboard, cpu, memory in my computer. Currently it has a pentium D 3.2 ghz thats just not cutting it for me anymore. I want to use my old Hp case that can only fit micro atx boards, and the 300w psu.
I plan on keeping my 500gb sata hd and Nvidia Gt240 1gb ddr5 graphics card, its fine as I am a light PC gamer, I have a PS3.
The programs I run: I do plan to program in Python (when I learn it), FruityLoops 10, Minecraft Bukkit server (It's multithreaded), AutoCAD, internet browsing, youtube, folding at home (i want moar ppd!), blender, itunes
I have a very tight budget of less than $350 to spend...
you are most likely going to need a new psu. The AMD quad core and the gts240 will give it a heart attack.
this is a good inexpensive off brand PSU. it will run the quad core and even a bigger GPU
XIGMATEK NRP-PC Series ACXTNRP-PC402 400W http://www.newegg.com/Product/Product.aspx?Item=N82E168...
not sure where you found a CM n520 for $30, but buy it. they are $50 on newegg.