**QCA9880/QCA9882** : Developed by the Atheros team at Qualcomm. These two chips are the earliest WiFi 5 solutions on the market and are widely used in routers, aps (access points) and embedded devices in businesses and homes.
- **MT7915** : Developed by MediaTek. This chip is relatively new, has a high cost performance, can support more functions while reducing power consumption.
** Frequency band support **
QCA9880** : Supports dual bands (2.4GHz and 5GHz), provides three spatial streams (3x3 MIMO), and is capable of speeds up to 1.3Gbps.
- **QCA9882** : Similar to QCA9880, but typically used for dual antennas (2x2 MIMO) with a maximum speed of 866 Mbps.
- **MT7915** : Supports dual-band (2.4GHz and 5GHz), and can support up to 4x4 MIMO, that is, can reach a speed of 1.7Gbps, support more spatial streams, so it is better than the first two in performance.
** Power consumption and integration **
- **QCA9880/QCA9882** : As an earlier WiFi 5 chip, the power consumption is relatively high, but because of the stable performance, there are still many applications in the market. The QCA9880 will consume more power than the QCA9882, but it will perform better in terms of transmission rate and coverage.
- **MT7915** : Mediatek has done more work on power optimization, so this chip will gene