Most popular AVR Microcontroller with lots of features.
is that chip is authentic?
i have problem to program it with usbasp.
The chip is original. You need to use different pins for ISP programming. See datasheet for the same. The general pins used for programming MOSI, MISO, SCK & RESET will not work. Use PDI, PDO, SCK, Reset to program using ISP. Also make sure you have given proper power supply.