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Radeon HD 5770, Radeon HD 4890, And GeForce GTX 275 Overclocked

ATI Radeon HD 5770: Memory With A Need For Speed

Click the image below to launch the image gallery For ATI's Radeon HD 5770.

Wearing a black shroud, the Radeon HD 5770 is a rather inconspicuous card. Don’t be fooled, though. Beneath that classy exterior lies a veritable panther with very sharp claws. Our test results are clear: the Radeon HD 5770 is perfectly capable of replacing the Radeon HD 4870. This new card is quieter than its predecessor and draws less power, too. Indeed, both in 2D and in 3D mode, the HD 5770 consumes about 50 watts less power than the 4870, while offering virtually the same performance in 3D games. Since it is manufactured on a 40nm process, the GPU never runs at more than 69 degrees Celsius, which isn’t much of a challenge for the cooler. Consequently, the card purrs along at an audible but unobtrusive 39 db(A).

Actually, we’d be hard pressed to identify a single drawback compared to the older card. What’s not to like? The new model consumes less power, produces less heat, runs quieter, supports DirectX 11, and offers performance that rivals that of the HD 4870, even with the first batch of drivers. Connectivity is good, too. The card sports two DVI connectors, one HDMI, and one DisplayPort output.

The real focus of this article is overclocking MSI’s GTX 275 and HD 4890. However, since we had a reference Radeon HD 5770 handy, we decided this would be a good opportunity to see how far we could push ATIs newest generation of mainstream cards. At stock speeds, our reference card clocks the GPU at 850 MHz and the memory at 1,200 MHz. ATI opts for GDDR5 memory for all members of the Radeon HD 5000-series (so far), although the memory bus is only 128-bits wide on this model.

We used ATI's own Catalyst graphics driver for our overclocking experiments, since its Overdrive utility offers plenty of headroom. As it turned out, our sample’s GPU was already close to its limit. We started off with a GPU frequency of 920 MHz, which we had to reduce to 895 MHz to stabilize the card. The memory was a completely different matter, though, and offered exceptional potential. Back in the days of the 4000-series, you considered yourself lucky if you managed to squeeze out an extra 10 percent margin by reaching 1,200 MHz. Our Radeon HD 5770 allowed us to set the memory frequency to no less than 1,445 MHz, which we had to lower slightly to 1430 MHz to ensure stability. An overclock from 1,200 MHZ to 1,430 MHz means a clock speed increase of 19.2 percent. Not bad at all for a mainstream card. 

Frequency in MHzGPUPercentMemoryPercent
ATI Radeon HD5770 Overclocked895105.31,430119.2
ATI Radeon HD5770850100.01,200100.0

As mentioned, the Radeon HD 5770 is already tied with the HD 4870 at stock speeds. Once it is overclocked, though, it gains another eight percent. That’s still a few percentage points short of the Radeon HD 4890's performance, but certanily not an insurmountable gap that could conceivably made up by driver-based improvements to the 5770.

However, the really good news here is that overclocking has no adverse effect on 2D power consumption or noise, since the card reverts to the same lowered clock speeds as before. Under load, its temperature only increases from 69 to 72 degrees Celsius, causing the fans noise level to rise from 39 to 40.5 db(A). But here’s the surprise: power consumption only increases by a mere 6 watts, showcasing the benefits of a 40nm production process. 

Graphics Card and Chip ClassFPSPercent
Radeon HD 4890 (1,024 MB)1,523.6114.8
ATI Radeon HD 5770 Overclocked (1,024 MB)1,433.5108.0
ATI Radeon HD 5770 (1,024 MB)1,332.9100.4
Radeon HD 4870 (512 MB)1,327.1100.0

ATI has outdone itself. The Radeon HD 5770 is really a fully-featured card, combining 1GB of fast GDDR5 memory, a much lower power consumption, low noise levels, an optimized driver with a real 2D mode as well as good overclocking capabilities, a well-balanced fan speed profile, HDMI and DisplayPort connectivity in conjunction with DVI, and DirectX 11 support.

  • amdgamer666
    Nice article. Ever since the 5770 came out I've been wondering how far someone could push the memory to relieve that bottleneck. Being able to push it to 1430 allows it to be competitive to it's older sibling and makes it enticing (with the 5700 series' extra features of course)
    Reply
  • Onyx2291
    Damn some of these cards run really well for 1920x1200 which I run at. Could pick up a lower one and run just about anything at a decent speed if I overclock well. Good ol charts :)
    Reply
  • skora
    If you're trying to get to the next cards performance by OCing, shouldn't the 5850 be benched also? I know the 5770 isn't going to get there because of the memory bandwidth issue, but you missed the mark. One card is compared to its big brother, but the other two aren't.

    I am glad to see the 5770 produce playable frame rates at 1920x1200. Nice game selection also.
    Reply
  • quantumrand
    I'm really disappointed that they aren't any benchmarks from the 5870 or 5850 series included. Why even bother with tha GTX 295 or 4870x2 and such without the higher 5-series Radeons?

    I mean if I'm considering an ATI card, I'm going to want to compare the 5770 to the 5850 and 5870 just to see if that extra cost may be justified, not to mention the potential of a dual 5770 setup.
    Reply
  • presidenteody
    I don't care what this article says, when the 5870 or 5970 become available i am going to buy a few.
    Reply
  • kartu
    Well, at least in Germany 4870 costs quite a bit less (30-40 Euros) compared to 5770. It would take 2+ years of playing to compensate for it with lower power consumption.
    Reply
  • kartu
    "Power Consumption, Noise, And Temperature" charts are hard to comprehend. Show bars instead of numbers, maybe?
    Reply
  • arkadi
    Well that put things in prospective. I was really happy with 260gtx numbers, and i can push my evga card even higher easy. To bad we didn't see the 5850 here, it looks like the optimal upgrade 4 gamers on the budget like my self. Grade article overall.
    Reply
  • B16CXHatch
    I got lucky with my card. Before, I had a SuperClocked 8800GT from EVGA. I ordered a while back, a new EVGA GeForce GTX 275 (896MB). I figured the extra cash wasn't worth getting an overclocked model particularly when I could do it myself. I get it, I try to register it. The S/N on mine was a duplicate. They sent me an unused S/N to register with. I then check the speeds under one utility and it's showing GTX 275 SuperClocked speeds, not regular speeds. I check 2 more utilities and they all report the same. I had paid for a regular model and received a mislabeled SuperClocked. Flippin sweet.

    Now they also sell an SSC model which is overclocked even more. I used the EVGA precision tool to set those speeds and it gave me like 1 or 2 extra FPS is Crysis and F.E.A.R. 2 already played so well without overclocking. So overclocking on these bad boys doesn't really do much. Oh well.

    One comment though, GTX 275's are HOT! Like, ridiculously hot. I open my window in 40 degree F weather and it'll still get warm in my room playing Team Fortress 2.
    Reply
  • With the 5970 out there seems to be nothing else about graphic cards that interests me anymore :D Its supposed to be the fastest card yet and beats Crysis too!
    Reply