techPowerUp posted a reviewon the AMD Radeon HD 4770
A quote from the article:
>> AMD Radeon HD 4770 Review
Today AMD released the world's first GPU that is produced in a 40 nm process. The HD 4770 is aggressively priced around ~$100 and offers great performance for your hard earned dollars. In our testing realized out that the card performs almost on par with the HD 4850. With the amazing 30%+ memory overclock we got on our sample, the HD 4850 will be surpassed easily.
>> AMD Radeon HD 4770 Review