Funny thing, I have a client with about 3 dozen internet connected computers and about the same in other devices such as phones, tablets, etc, and they use a 10Mbit/s fiber connection with pretty much no complaints for their main internet connection, VPN, and FTP services, plus a secondary 10Mbit/s MPLS circuit for a direct corporate connection. You don't need a super fast connection for having many tabs on the go unless you are downloading and uploading large amounts of data continuously. I have another client with about the same number of computers that was on a 10Mbit/s satellite connection at one site, and a 10 Mbit/s wireless connection at a second site and also didn't have much trouble until their new Citrix based software came online and they needed a lower latency connection and switched to cellular connection that's actually 2 x 5Mbit/s per site. And many other clients are on DSL connections under 7Mbit/s; quite a few of those usually complain a bit but even most of those are not too bad for most day to day work tasks.



I still think you don't need the computer you think you do. Almost none of out clients use i7's most are i5' with many even being i3's, I use an i5-4460 or something like that with 16GB of RAM at work and have ten times what you have open; multiple remote sessions using various software, VPN connections, a password management portal, a ticketing portal, multiple tabs in multiple browsers open most of the time, Outlook and usually Excel, SQL Server, VMWare background services, Acronis services, three monitors, and usually some other stuff. Because of our slightly remote location we have two poor internet connections, a 10Mbit/s wireless connection and a 7Mbit/s DSL connection, there's a new 250Mbit/s fiber connection hanging from the pole but we are still waiting for it to be connected and made live. But my computer isn't slow with all of that, and browsing the internet isn't much of a problem, pain to download large files and sometimes a little slow for remote work when we have 5 staff members active but that's a much heavier use then you describe with a much slower and with likely higher latency connections.



I suspect an infected or improperly setup or improperly maintained computer is what is affected your performance unless that warehouse program is extremely demanding but you haven't mentioned it too much or what it is. What program is it? What is open in each of your tabs? Are they running remote apps? How much data are they transferring? Are you using the internet connection by yourself or do you have other people using it too? Do you have malware/adware on your system? Are they abusing the internet connection?



We use only sell Intel based computers and every one of our multi-national companies that we support are only supplied with Intel based computers and servers. Intel platforms seem to be more stable and until Ryzen considerably faster. It's also one of the reason Apple uses an Intel platform.



Also power supplies don't make your computer faster.