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ATI Radeon HD 4770: 40nm Goes Mainstream

Power Consumption

Each of the cards we tested treats power management a little differently. The following table illustrates the idle/load clock speeds observed for each board:

Idle Clocks (GPU/Memory)Load Clocks (GPU/Memory)
Radeon HD 4850160/500625/993
Radeon HD 4830500/750575/900
Radeon HD 4770250/800750/800
Radeon HD 4670165/250750/1100
GeForce GTS 250738/1100738/1100

At first, it seems strange that the 640-shader Radeon HD 4830 would idle at the same power consumption as the Radeon HD 4850. However, the 4830 is being run at significantly higher idle clocks. Under load, the faster HD 4850 widens the gap and uses the most power in this comparison.

The Radeon HD 4770 scales back idle power consumption to 152W (total consumption from the wall socket), just 4W less than the 55 nm RV770 LE running 250 MHz faster. With a load applied, however, the new ATI card is 18W under the Radeon HD 4830 and 29W under Nvidia’s GeForce GTS 250. In fact, the card’s closest competitor is the mainstream Radeon HD 4670, which uses 19W less under full load.

  • Dekasav
    "Well-played ATI, well played."

    Couldn't say it better, myself.

    Looks to be a pretty good card, but nothing spectacular. 40nm is nice, a little cheaper HD 4850 (fewer FPS, too), but all in all, nicely done.

    I wonder who'll sell more, now, the 4850 or the 4770?
    Reply
  • "The card’s strange behavior continues on the CPU-only test, where it takes a nearly 2,000-point hit for no good reason" maybe because of the 128 bit memory bus
    Reply
  • kelfen
    solid card for the average gammer ;)
    Reply
  • bardia
    I'm pretty blown away at the kind of performance that can be had for ~$100 these days thanks to ATI. It wasn't long ago when Nvidia forced us to choice between the incredibly crappy 8600GT for $150 and the ~$250-300 8800GTS 320.

    ATI is leading us into graphics nirvana.
    Reply
  • pharge
    Wondering will 4770 a good one for crossfire? Can we have a review on it....? With its low power useage when fully loaded, cheaper price (~$40 cheaper than 4850 when CF), not much slower than 4850 (512MB), and nice overclocking range... It will be nice to see will 4770 CF setup be useful (playable) in games (1920x1200) with some visual goodies truned on.
    Reply
  • Wondering about 4770x2, should be wishful item
    Reply
  • Summer Leigh Castle
    bardiaI'm pretty blown away at the kind of performance that can be had for ~$100 these days thanks to ATI. It wasn't long ago when Nvidia forced us to choice between the incredibly crappy 8600GT for $150 and the ~$250-300 8800GTS 320.ATI is leading us into graphics nirvana.I spent almost $300 on my 8800GTS 320 OC when they came out and I thought I got a great deal. Things have changed! Competition = good for the consumers!
    Reply
  • eklipz330
    this card is amazing for 1680x1050, if they can manage to slap some aftermarket coolers on there, buying two for the price of a 1gb 4870, and overclocking them, im pretty sure we'd pass gtx 285 numbers.... simply amazing.

    great card for 16x10 resolution. good job ati, you've done more damage to nvidia in the past year than they've done to you in the pass 3-4
    Reply
  • eklipz330
    *edit*

    just checked newegg and they all have aftermarket coolers on them... wow *_*

    http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&Description=4770&x=0&y=0
    Reply
  • Ryun
    eklipz330*edit*just checked newegg and they all have aftermarket coolers on them... wow *_*http://www.newegg.com/Product/Prod 70&x=0&y=0
    Nah, they're reference coolers from AMD. From what I heard, AMD gave the AIB partners a choice between the dual slot and the, for lack of a better term, uglier cooler. Apparently the "uglier" one is cheaper so that's what you're probably going see for now.
    Reply