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Atmega328P Arduino Bootloader Choices

I am looking to purchase some ATMEGA328P Bootloader Chips and am confused on which to purchase! I have a Arduino Uno R3 and am looking for a replacement Chip. I see you have three choices: Uno, Duemilove, and Blank. I know I do not want Blank… but I was wondering about the Uno Choice as I know there is a Standard Uno Bootloader and the Uno OptiBoot Bootloader. Which one are you having installed in these chips? I need to make sure it is compatible with my Uno R3 Board using the Atmel USB chip.

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Our Uno chips are loaded with the standard R3 compatible bootloader, and they should work perfectly with your board.

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