Re: adding ram. possibly other parts. help?
There's no point getting much more RAM, I'd get rid of your 1GB stick and put another 2GB in there for 4GB for Dual channel and Does your Motherboard have a PCI-E 8/16 Slot? What Power Supply do you have. When I know this I can help you more.
Also integrated sound is usually enough. Depending on how you use it.
Yeah, what did you mean by Fan, Processor heatsink, case fan or what?
Intel I5 2500K | Gigabyte P67 UD5 |16GB Mushkin Redline @ 2133MHZ|Custom Watercooling | Crucial C300 64GB SSD | GPU currently bidding for |Corsair HX 1000W PSU | Corsair 700D