Need to upgrade my alienware

Onegomoo

So, I have an alienware aurora desktop. I believe it's from 2011. I want to upgrade the cpu to something newer. It has a 1st Gen core i7 and ddr3. I have a sata ssd and a 2060 KO ultra gpu. What kind of upgrade can I expect with about a $600 budget. I know it's not a lot of money but that's what I have to spend. Don't care if it's amd or Intel. I'm sure I'm going to have to buy a mobo, ram and cpu and possibly a psu. I think the current mobo is microatx. Can I swap out those 4 items for this budget and get a decent gaming setup without changing the case? 

TSPhillipT

Hello @Onegomoo
Here is what I made using an mATX motherboard, a 3700X, 16GB of DDR4 RAM and a 750W Power Supply, all within 600$.  You can definitely change these parts out as well for cheaper variants as well, especially the motherboard; https://www.microcenter.com/site/content/custom-pc-builder.aspx?load=8d707865-98ac-4460-a602-62ea38949fa6