ATI Radeon HD 4770 In CrossFire: Unbeatable At $220


In our Radeon HD 4770 launch coverage, we relied on ATI’s Catalyst Control Center for overclocking. The Overdrive routine, however, was limited to pretty paltry settings. We took the default 750/800 MHz clocks up to 830/850 MHz. And that was only on a single board.

But using a modified version of RivaTuner (originally showcased in Xbit's 4770 story), we were able to independently tune each of our Radeon HD 4770s up to 850/940 MHz and run stably in CrossFire mode (individually we got the second sample up to 870 MHz without stability issues).

The benefit attributable to overclocking increases according to resolution, which makes sense given the more demanding graphics load. By the time you hit 1920x1200, you’re looking at a roughly 10% gain sans AA, and an even more significant boost with it, though only 1280x1024 is really a playable option at that point. At 1680x1050, with 4xAA, you’re looking at a greater-than 20% boost—nothing short of incredible.

Chris Angelini
Chris Angelini is an Editor Emeritus at Tom's Hardware US. He edits hardware reviews and covers high-profile CPU and GPU launches.
  • curryj02
  • cangelini
    Working on getting the drop-down or ToC on every page. Sometimes things are changed without advanced notice. Trying to get a solution for you guys!
  • crisisavatar
    curryj02BRING BACK THE DROP DOWN MENU FOR NAVIGATION!! ARGHHHH!!Seriously, is a hassle to browse without it.
  • Spathi
    This RSS feed has the Intel logo??? Larrabee on the mind? ahaha
  • Summer Leigh Castle
    Great article. Just for kicks, how do the xfires of the 4830 and 4850 compare to the xfire 4770?

    How about a dual column menu table? My mobile browser doesn't like to work with drop-down menus. I know, just nick picking like everyone else. :D
  • mrubermonkey
    I have already mentioned the drop down issue, but I am mentioning it again for emphasis. Consider Bert Lance's saying, "If it ain't broke, don't fix it." By the way, nice article.
  • Ciuy
    what drop down menu`s ? :p didnt notice anything lol

    i like old school navigation :D
  • xbsoft
    The other day I was trying to prove to my brother that 2 ATI 4770's would outperform anything in its price range and my brother didn't agree with that... lol I can't wait to show him the article.

    Unfortunately, he already bought a 4850 card which he should be okay for now, I guess.

    Anyways, great article. I really enjoyed it. :)
  • ta152h
    Just put in the URL to jump to the page you want, for now.

    For example -,2288-3.html will get you to page three.,2288-5.html will get you to page five, etc...
  • quickwind
    Hmmm I wonder how three of these would scale together. Nice article as well, very interesting how this compares to the other cards