hd 5770 vs gtx260 bench

Discussion in 'Benchmark Mayhem' started by L0cusT, Apr 20, 2010.

  1. L0cusT

    L0cusT Master Guru

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    GPU:
    Sapphire HD 5770 1GB x2
    Just a question about these cards...

    i bought a new computer, with a HD 5770, i took care of watching the benchmark tests on some reviews on the internet and the result is in most of the games, the radeon 5770 performs slightly better than the gtx 260, wich cost was 55$ more expensive than my 5770 ( 185$ in canada ). But, i just realized that it is only 128 bits memory bus VS 448 bits ( gtx260 ) That said, i dont understand how the 5770 can perform better most of the time, with only 128 bit memory? Is the memory Bandwidth really a good point to look at before buying a videocard? i thought i was more important, a bit like the seconds needed on a car to make 0-100mph.
     
  2. DSK

    DSK Banned

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    GPU:
    HD5770/BenQ G2220HD
    Well

    1. The GDDR5 helps
    2. The HD57xx series performance comes mostly from the core clock speed.
     
  3. Atlas

    Atlas Maha Guru

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    You just experienced what marketing figures can do. The hd 5770 has gddr 5 memory which is a lot faster than the memory used on the 260.
     
  4. The Chubu

    The Chubu Ancient Guru

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    Base speed of GDDR3 (GTX260) is doubled. Base speed of GDDR5 (HD5770) is quadrupled (i dont know exactly how to write that word in english).

    So, a 1Ghz 256bit GDDR3 memory (2Ghz effective) will perform exactly the same as 1Ghz 128bit GDDR5 memory (4Ghz effective).

    Anyway, you're right about that the GTX260 has more bandwidth that a HD5770. Even with GDDR5, the massive 448bit wide bus of the GTX260 get more in total raw bandwidth.
     

  5. L0cusT

    L0cusT Master Guru

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    i see now! its great, i wasnt sure about this 5770 ( always been with 3dfx,nvidia ) it is my first ati video card but...now that i know it performs something equal to the 260, im really really happy of my choice.
     
  6. Razorvashka

    Razorvashka Member

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    I am proud of it :)
    [​IMG]
     
  7. DSK

    DSK Banned

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    GPU:
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    My old GTX was pretty good
    overclocked decently and had full voltage control aswell.

    [​IMG]
     
    Last edited: Apr 21, 2010
  8. Atlas

    Atlas Maha Guru

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    Damn I want an i7 too :)
     
  9. The Chubu

    The Chubu Ancient Guru

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    Well, since the quantity of ROPs, and the big bandwidth of 448 bits that the GTX260 have, small OC (well, yours isnt "small" :D ) can get far more benefits than OCing a HD5770. More or less like the multiplier in the CPUs, if you have a big multiplier, small base frecuency increases bring much more performance than with a low multiplier.

    Anyway, happy with my current HD5770, playing games well, cool and quiet. My C2D is a drawback now...
     
  10. axeten

    axeten Member

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    GPU:
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    ...

    I bought a new system about a month ago and had the saphire X overclocked edition of the HD5770. After many problems with my computer bluescreening for no reason (something in my setup was conflicting) i swapped with a mate for his top edition Asus GTX260.

    I actually score over 1000points higher in 3dmark vantage than i did with the 5770. And metro 2033 runs better too. I have overclocked the GTX more than the original overclock settings though. The 5770 was just standard.
     

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