For your consideration ...
No no no. : ) You're so behind on tech. Ya need
cat 8 Ethernet cables for super duper high speed downloads. And be sure to update your modem so it can download at speeds of 40gbs+. Also, check the speed of your ethernet card in your computer and what its rated transmission speeds are. You might want to upgrade that.
And also ...... Sometimes Ethernet cards are integrated into motherboards, if that is your case, then you'll have to install a new, (gigabyte speed), ethernet card in one of your computer's expansion slots to realize an increase in speeds. Because you can have all the fastest high speed equipment installed from the cables, and routers, upstream to an updated modem, but if your computer's ethernet card, (non-updated), is basically a smaller diameter data pipe, then there is your speed restriction.
Also, download speeds can be determined by the sending server from which that data is coming. If a server can only send out data, say at 50mbs speeds, then, that's all you're gonna get from any download from that site, slower if there is lots of traffic to such site.