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    AMD Launches 40nm ATI Mobility Radeon HD 4830/4860

    Discussion in 'Notebook News and Reviews' started by Charles P. Jefferies, Mar 3, 2009.

  1. Charles P. Jefferies

    Charles P. Jefferies Lead Moderator Super Moderator

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    AMD Launches 40nm ATI Mobility Radeon HD 4830/4860
    [​IMG]
    AMD today introduced the world's first 40nm mobile grahpics cads, the Mobility Radeon HD 4830 and HD 4860. The HD 4860 supports GDDR5 memory, and both GPUs support Microsoft DirectX 10.1.

    AMD Press Release (BusinessWire.com)

     
    Last edited by a moderator: May 7, 2015
    Charles P. Jefferies, Mar 3, 2009
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  2. Phinagle

    Phinagle Notebook Prophet

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    Hopefully they use the smaller die size to produce a single-card crossfire option for notebooks.

    The single-card Mobility 4850x2 that's been shown wasn't much smaller than a two-card option.
     
    Phinagle, Mar 3, 2009
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  3. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    Too bad all that potential is wasted. Only 128-bit interface... think about if it were 256-bit!
     
    sgogeta4, Mar 3, 2009
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  4. Quicklite

    Quicklite Notebook Deity

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    Is there any much point for GDDR5 memory over 128 bit?

    Also 640 stream shaders means they probably did proper shrink as oppose to disabling those.
     
    Quicklite, Mar 3, 2009
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  5. dtwn

    dtwn C'thulhu fhtagn

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    dtwn, Mar 3, 2009
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  6. Xibalban

    Xibalban Notebook Geek

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    It actually has more bandwidth than the desktop 4850 because of the GDDR5. Check the discussion that dtwn83 linked.
     
    Xibalban, Mar 3, 2009
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  7. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    It might have more bandwidth but the matter of the fact is, at high resolutions the 128-bit and less shaders will limit its performance. I'll wait to see real game benchmarks.
     
    sgogeta4, Mar 3, 2009
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  8. tizzao

    tizzao Notebook Evangelist

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    Would you rather have 2x2 or 1x4?

    That's pretty much the difference between GDDR3 and 256bit vs GDDR5 and 128bit.

    It's the less shaders might kill some performance, but desktop cards have shown a little overclock in the 4830 can bring it up to 4850 performance most of the time.

    I'm not ATI fanboy, but I love what I'm seeing. I was set on getting one of those Gateway FX laptops, but after getting 3 straight defective ones (screen blotch and overheating video card), I'm going to be looking to the new 4860 for mobile gaming.
     
    tizzao, Mar 3, 2009
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  9. highlandsun

    highlandsun Notebook Evangelist

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    Now if only they'd release a 45nm mobile CPU...
     
    highlandsun, Mar 3, 2009
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  10. kkl1014

    kkl1014 Notebook Consultant

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    I wonder how the 4860 compares to the 4850 in that new MSI laptop.
     
    kkl1014, Mar 3, 2009
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  11. IKAS V

    IKAS V Notebook Prophet

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    Very nice, the article says we will first see them in the ASUS K series notebooks, aren't those the Lamborghini line of laptops, hopefully we will also see them used in smaller laptops like a 13" that will have good battery life and be a mobile powerhouse.
     
    IKAS V, Mar 3, 2009
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  12. Micaiah

    Micaiah Notebook Deity

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    http://www.guru3d.com/article/radeon-hd-4750-rv740-review-preview-test/7

    Looks pretty good to me. The desktop version (HD 4750) will end up replacing the 4830, and judging from the preliminary tests, it will do so just fine.
     
    Micaiah, Mar 3, 2009
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  13. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    They've had 45nm CPUs for a while now...

    4860 is supposedly faster.

    It's MXM 3, so you most likely won't find them in small laptops.
     
    sgogeta4, Mar 3, 2009
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  14. Jlbrightbill

    Jlbrightbill Notebook Deity

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    Some of these posts make me want to facepalm.

    GDDR5 means four times the memory clock, GDDR3 is two times the memory clock. All 3 of the following scenarios will yield identical memory bandwidth:

    -GDDR3 chip with 256-bit bus at 900 MHz
    -GDDR5 chip with 128-bit bus at 900 MHz
    -GDDR5 chip with 256-bit bus at 450 MHz

    The lack of shaders sure isn't hurting RV740 desktop, as you can see from the performance preview/review up there.
     
    Jlbrightbill, Mar 3, 2009
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  15. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    So why is the 4870 GDDR5 256-bit 888MHz (x4) not that much faster than the 4850 GDDR3 256-bit 850MHz (x2)?
     
    sgogeta4, Mar 3, 2009
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  16. Jlbrightbill

    Jlbrightbill Notebook Deity

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    Mobility 4870? It's using GDDR3 currently.
     
    Jlbrightbill, Mar 3, 2009
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  17. Charles P. Jefferies

    Charles P. Jefferies Lead Moderator Super Moderator

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    Here we go again with more rebrands . . . oh wait, these are ATI cards, not Nvidia. My mistake! :)

    The HD 4000 series is awesome, a great improvement over the HD 3000 and those were a large improvement over the HD 2000. I'll have to get my hands on a notebook equipped with either of these GPUs for testing.
     
    Charles P. Jefferies, Mar 3, 2009
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  18. Jlbrightbill

    Jlbrightbill Notebook Deity

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    The GDDR5 4870's are supposed to be coming, plus there's RV740 expected next month that will be epic.
     
    Jlbrightbill, Mar 3, 2009
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  19. Rob41

    Rob41 Team Pirate Control

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    Rob41, Mar 3, 2009
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  20. Phinagle

    Phinagle Notebook Prophet

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    They'd likely need another die-shrink or two before they could fit two GPUs on any of the current MXM sized cards. At 40-nm a dual gpu card would still be larger than a single gpu card but might offer enough of a reduction to fit in a laptop smaller than 17".

    So no quad-crossfires yet unless they make bigger laptops....or external GPUs start taking off.
     
    Phinagle, Mar 3, 2009
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  21. Red_Dragon

    Red_Dragon Notebook Nobel Laureate

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    i think we are honestly gonna see the trend of 20" notebooks coming back....this year. I also think we will start seeing 20" notebooks with more then two GPU's
     
    Red_Dragon, Mar 3, 2009
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