These Realtek chipsets represent different tiers of Wi-Fi performance, ranging from budget-friendly legacy support to modern high-speed dual-band connectivity. RTL8188FTV (RTL8188F) RTL8811CU (RTL8811C) RTL8812BU (RTL8812B) Wi-Fi Standard 802.11b/g/n (Wi-Fi 4) 802.11ac (Wi-Fi 5) 802.11ac (Wi-Fi 5) Max Speed 600 Mbps (Dual Band) 1300 Mbps (Dual Band) Bands 2.4 GHz only 2.4 GHz & 5.8 GHz 2.4 GHz & 5.8 GHz USB Interface USB 2.0 (compatible with 1.1) USB 2.0 / USB 3.0 USB 3.0 (high speed) Antenna Config 1T1R (Single Stream) 1T1R with MU-MIMO 2T2R (Dual Stream) Review & Use Case Analysis RTL8188FTV (The Budget Choice)