People here will tell you whats the best option to go to but it would help if you posted a budget price that you had in mine because I could link you to a crazy cpu that would get the job done.
http://www.newegg.com/Product/Product.aspx?Item=N82E16819117643&nm_mc=KNC-GoogleAdwords-PC&cm_mmc=KNC-GoogleAdwords-PC-_-pla-_-Processors+-+Desktops-_-N82E16819117643&gclid=Cj0KEQjwwry8BRDjsbjMpPSDvagBEiQA5oW0nJUzrSt1bKXKvgUVXlQXNvXMItBnQh5bzIBQ6yTsovkaAsQH8P8HAQ&gclsrc=aw.ds
here's a 10 core 20 thread cpu. If you wanted to bot a lot of accounts i bet this would satisfy you a lot maybe even more then what your asking. but this is also depending on how much the bot takes which I don't know.
If the price is too much for the cpu since almost 1.6k for a cpu is alot to drop on a cpu heres a different one
http://www.newegg.com/Product/Product.aspx?Item=N82E16819117402&nm_mc=KNC-GoogleAdwords-PC&cm_mmc=KNC-GoogleAdwords-PC-_-pla-_-Processors+-+Desktops-_-N82E16819117402&gclid=Cj0KEQjwwry8BRDjsbjMpPSDvagBEiQA5oW0nO2fi0k47BdewSkaTDVQ53y9qrKP8tAt_XRSTutuh-MaAuJ98P8HAQ&gclsrc=aw.ds
basically the same thing as above just with 6 cores now and 12 threads and the price is only 390$ usd if you want the cheaper route this is the way to go. also since its unlocked it can be overclocked to 3.6ghz if you want the power I guess
For ram I would listen to everyone that says 16gb of ram since you want to run so much your definitely going to be using it and since osbot uses web walking its probably not the lowest of memory now a days. Also if you actually got the cpu above then you would need the newer socket motherboards which is also ddr4 ram so remember to get ddr4 not ddr3.