Hi Red, Thanks for the reply. I will give it a try and advise accordingly  Many thanks, 
Good day, Can I run more than 16gb of ram on a dell optiplex 3020. I currently have a 16gb 8500 ddr3l ram which I haven't slotted in and 2×4gb drr3 sdram which are currently running the system on a i5-4570 cpu [NAME].20ghz. More than anything I just need to know if I can use the ddr3l ram and get a matching one, should I not be able to use it with one of the 4gb Regards 
Ram