Upgrading an old Inspiron 570. From Sempron to...?

[ninecastles]

Hello all. I have a trusty Dell Inspiron 570 that has been going strong for about 7 years. I don't really want to replace it, but with Windows 10 and other software changes over the years it's starting to struggle. It frequently hits and stays at 100% CPU usage when doing standard multitasking (internet plus Office etc), can't play anything on YouTube at 720p or above etc.

Currently it has...

AMD Sempron 140
Dell 04GJJT motherboard, chipset 785G
4GB DDR3 @ 533MHz
2GB ATI Radeon HD 4200 (Dell)
298GB WDC 7200 RPM SATA hard drive (with 7,000 power ons and 414 days of on time according to Speccy)
OEM 300W power supply

I believe the MB socket is AM3, and Dell said this is a list of suitable processors I can upgrade to...

Bang for buck wise, what do you recommend? I'd like the PC to be able to handle image creation/editing (Photoshop, Illustrator), multitasking etc. I don't plan to add a video card at the moment, and don't think there's really space either.

Perhaps a new processor, 8GB of RAM and an SSD?

How about the 6300 Black Edition 3.50GHz (Socket AM3+) in the Overclockers store?

How soon until the PSU would need upgrading?

Thanks for the advice everyone. I know it's not an exciting high end build, but it's served me well so far!

 

[ninecastles]

Thanks for the advice chaps, much appreciated.