In the process of shifting the product lineup to the Radeon HD 6000 series, AMD rebranded the 5770s to 6770s. So nobody should expect a significant difference. Anyhow Sapphire promises some advantages in the Radeon HD 6770 Flex that HT4U.net is exploring in the review.
There is a lot of free Microsoft software to be had, programs which enable better web surfing and help protect against spyware are just two types. PCSTATS Tips