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Thread: Llano in the house... (as Charged :-) )

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  1. #11
    Xtreme Legend
    Join Date
    Nov 2003
    Location
    Helsinki, Finland
    Posts
    1,692
    The unlocked GPU clock is the thing that makes A8-3870 so great.
    I´ve been using 900MHz SCLK in 24/7 use for months without any problems on air cooling.
    Most of the games are fully playable even at stock clocks, let alone at 900MHz.

    The only downside on Llano is the limited memory bandwidth.
    To get the every last bit of performance out of the APU your MEMCLK needs to be roughly 200MHz higher than the GPU (SCLK) clock (in games). In benchmarks the optimal MEMCLK-SCLK ratio is even higher, 250-300MHz+.

    While SCLK operating at 900MHz the optimal MEMCLK is already around 1100MHz.

    Here is the best run I could do on air (in 25c ambient):

    http://3dmark.com/3dm11/2223751

    SCLK at 970MHz the DRAM is a bottle neck even at 1250MHz...

    Obviously I was just testing the GPU part as CPU clocks do not matter in 3DMark11.

    Unfortunately the GPU part in my chip has a severe cold bug so no gains at sub zero.
    I have not seen or heard about a cold bugged Llano before so I need to try with another chip.
    Last edited by The Stilt; 12-20-2011 at 12:48 PM.

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