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GDDR5 memory frequency

Last post 12-03-2008, 1:29 PM by egghead2. 11 replies.
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  •  08-06-2008, 1:59 PM 369682

    GDDR5 memory frequency

    Some people have been confused about ATI Radeon HD4870 (X2)'s memory speed due to GDDR5 configurations. DDR to GDDR4 are double rate, producing 2 bits for every clock. GDDR5 doubles this, giving 4 bits to every clock. This gives HD4870 (at stock settings) a base frequency of 900MHz and a transfer rate of 3.6Gb/s.

    http://www.tomshardware.com/reviews/best-graphics-card,1987-3.html

    http://en.wikipedia.org/wiki/GDDR5

  •  08-06-2008, 2:12 PM 369701 in reply to 369682

    Re: GDDR5 memory frequencies

    Thanks mr b good info even for us old timers!Yes
    I fold for my uncle Mac, aunt Doreen and anyone who has to suffer from these DISEASES
    what goes around comes around
    (RIG)GA-EP45-UD3P, Q6600@2.4, 2 HD2600XT512mb 128bit, 4gigs OCZ 1066 ddr2 Seagate barracuda sata 120 gig, 2 Liteon sata DVD Burner,RaidMax AZTEC midtower, PC P&C 610watt PSU, 19" envision LCD monitor.

  •  08-06-2008, 2:39 PM 369718 in reply to 369701

    Hi, Mom!!

    hey, ATI keeps on using new stuff...what can you do about it? (not that anyone on the red team want to)

  •  08-07-2008, 11:28 AM 370170 in reply to 369718

    Re: Hi, Mom!!

    Not to mention that GDDR5 is approximately twice as fast as GDDR3 with twice the bandwidth.
    The vision must be followed by the venture. It is not enough to stare up the steps - we must step up the stairs. ~Vance Havne



    Only those who will risk going too far can possibly find out how far one can go. ~T.S. Eliot

  •  08-19-2008, 12:11 AM 376763 in reply to 370170

    Re: Hi, Mom!!

    oh my, this is just a good reminder that people should really do some research and read up on things before they start spending cash or posting replies about new tech they do not know about yet.   Thanks MrBGeeked

  •  10-09-2008, 3:30 PM 404787 in reply to 376763

    Re: Hi, Mom!!

    Great thread, I would just like to say thanks to GDDR5 we get the ridiculous comparison of the GTX260 to the HD4870...it has almost TWICE the  and memory size and interface. lol. Just makes me laugh but guess we need something to compare to Nvidia. Ne1 have any benchmarks for the difference in the HD4870 512MB and 1GB? Sometimes there is not much of a performance difference but in my 8800GT I saw a drastic change between my 512 and 1GB!
    Free userbars
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  •  11-06-2008, 4:23 PM 418772 in reply to 369701

    Re: GDDR5 memory frequencies

    Awesome, good to know.  
    I <3 newegg.

  •  11-06-2008, 11:28 PM 418943 in reply to 418772

    Re: GDDR5 memory frequencies

    I see those comparisons between the cards all the time but now they know better.
    “Technology has the shelf life of a banana.”
    -Scott McNealy

  •  11-16-2008, 6:40 AM 423539 in reply to 418943

    Re: GDDR5 memory frequencies

    Good information! Thank you!

  •  11-17-2008, 2:11 PM 424944 in reply to 423539

    Re: GDDR5 memory frequencies

    Thanks! There is so much good info here, glad I finally found these forums.

  •  11-21-2008, 10:10 AM 427584 in reply to 376763

    Re: Hi, Mom!!

    MeiLing:

    oh my, this is just a good reminder that people should really do some research and read up on things before they start spending cash or posting replies about new tech they do not know about yet.   Thanks MrBGeeked

    Very true! Research is definitely needed no matter what project is taken on.


  •  12-03-2008, 1:29 PM 435238 in reply to 427584

    Re: Hi, Mom!!

    seodeveloping:
    MeiLing:

    oh my, this is just a good reminder that people should really do some research and read up on things before they start spending cash or posting replies about new tech they do not know about yet.   Thanks MrBGeeked

    Very true! Research is definitely needed no matter what project is taken on.

     

    Yep. Most people just expect to be able to hop into something like this and just get disapointed.  
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