MAXIMUS IV

Hi All, I need a recommendation on a graphics card for my old PC, it has never had one but i'd like one for gaming but unsure if any new ones will be compatible PC specs: Motherboard: ASUS MAXIMUS IV GENE-Z GPU Chipset - 2 x PCIe 2.0 x16 (x16 or dual x8) CPU: i5-2500K with Zalman cpu cooler...

So I am about to get a new 100mbit connection and the default router they are giving me is aged and wouldn't be able to fully utilise my devices. I am fairly new to networking in general and I am wondering if the Tp-Link Archer C8 with AC1750 is good enough to utilise the full speed or if I...