Benchmark Reviews posted a review on the ATI Radeon HD5770 Juniper GPU Video Card

Coming right on the heels of the HD5800 series launch, ATI brings us another batch of cards based on class-leading 40nm GPUs and GDDR5 memory. The new cards, Radeon HD5770 and HD5750, use the same architecture as the new HD5800 series, but ATI basically cut the Cypress chip in half to create a brand new video card with hardware specs somewhere between an HD4870 and an HD4890. If you're thinking that's not a bad place to be, but want to see some proof of how the HD5770 performs, Benchmark Reviews is pleased to offer you the results of our extensive testing.

ATI Radeon HD5770 Juniper GPU Video Card Review