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Thread: Radeon HD 5970 Offers Massive Overclocking Headroom

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    Default Radeon HD 5970 Offers Massive Overclocking Headroom

    AMD's dual-GPU flagship graphics accelerator, the Radeon HD 5970, is closer than you think it is. Slated for 18th Nov, it includes every feature that allows AMD to reclaim the performance leadership it yearned for since the beginning of this year. In a series of company slides sourced from XtremeSystems Forums, it is learned that this could be one of the first accelerators which AMD "openly" markets as having a "Massive Headroom" for overclocking. While the clock speeds on the HD 5970 are lower than those on the single-GPU HD 5870, AMD lifted limits on what the driver-level ATI Overdrive software can offer in terms of clock speeds. While the engine (core) and memory speeds are set at 720/1000 MHz, the unlocked ATI Overdrive lets users take the clock speeds all the way up to 1000/1500 MHz. That's 30% for the core, and a stellar 50% for the memory.

    To back such speeds, AMD seems to have splurged heavily on top-notch components on the PCB. To begin with, the PCB holds two high-grade AMD Cypress GPUs, each with all its 1600 stream processors enabled. The GDDR5 memory, while clocked at 1000 MHz or 4 GT/s, is technically rated by its manufacturer to run at 1250 MHz or 5 GT/s. All systems are powered by high-grade digital PWM voltage regulators, with independent Volterra VRM controllers that allow real-time monitoring, and software voltage control. Barring the five-odd cylindrical solid-state capacitors, Japanese pure ceramic surface-mount capacitors are extensively made use of.




    The card's cooling assembly isn't any less descriptive either. It consists of a back-plate that cools memory chips on the reverse side of the PCB, while its obverse side is cooled by a large, consistent vapor-chamber plate, which covers the main components such as GPUs, the PCI-Express bridge chip, and the VRM chips. This is a design change compared to the R700 and R680, in which each GPU had its own heatsink, and one of the two would end up with second-hand (pre-heated) air from the other. Instead, the vapor-chamber plate conveys heat directly to a large, monolithic heatsink, which from the looks of it, features aluminum-fabbed air-channels. AMD's workhorse leaf-blower is still around, though this time, it is controlled by an SMSC EMC-2103 multi-point programmable PWM fan controller. The specs sheet shows the card's idle and maximum board power draws to be 42W and 294W, respectively.



    I haven't heard of any high end card with such high OC!!! AMD u rock!!

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    Default Re: Radeon HD 5970 Offers Massive Overclocking Headroom

    eita niye already ekta thread khula ase na? :S

    Red ViperZ---ЯV●shafiee007

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    Default Re: Radeon HD 5970 Offers Massive Overclocking Headroom

    Nope. That about its release date and specification. This one is about its overclocking ability. According to AMD 5970 OC like hell and they removed the OC limitation in AMD overdrive

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    Default Re: Radeon HD 5970 Offers Massive Overclocking Headroom

    Theres a reason for it, according to me atleast. Those are basically 5870 cores with lowered clockspeeds, due to the fact that having full speed 5870 cores x2 will exceed the 300W TDP of the PCI-E specification (it states a max of 300W for a single card). Hence, they simply lowered the clockspeeds to meet the PCI-E spec, but that doesnt mean it cant reach the fully overclocked speed of a 5870 (around 950 - 1000 core)

    So basically, the headroom is more because its going from 725 to ~950, compared to 850 to ~950 in the case of the 5870

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    Default Re: Radeon HD 5970 Offers Massive Overclocking Headroom

    Vai koekta jinish amar aktu jana dorkar . keu janle plz help koro ....

    1. 5870 x2 tai ki 5970 ? ar oitar spec keu janle plz share koro.

    2. 5870 ar 5850 ai card gular bangladeshi price (BDT) koto ?

    3. 5870 ar 5850 2gb version kobe release hobe ? jemon sapphire 4890 ar akta 2gb version net a dekhlam sapphire ar site a.ar oder to 5870 ar 5850 card gular to 2gb release korar kotha .kobe korbe keu janle plz post koro.

    4. 5870 ar 5850 card gular dam kobe komte pare ?

    5. kon kon company valo hobe 5870 or 5850 te ? jemon sapphire , xfx , msi ,gigabyye .

    keu answer gula janle plz aktu share koro.
    Last edited by Blanka; November 18th, 2009 at 13:16.
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    Lightbulb Re: Radeon HD 5970 Offers Massive Overclocking Headroom

    Quote Originally Posted by Mazhar View Post
    Theres a reason for it, according to me atleast. Those are basically 5870 cores with lowered clockspeeds, due to the fact that having full speed 5870 cores x2 will exceed the 300W TDP of the PCI-E specification (it states a max of 300W for a single card). Hence, they simply lowered the clockspeeds to meet the PCI-E spec, but that doesnt mean it cant reach the fully overclocked speed of a 5870 (around 950 - 1000 core)

    So basically, the headroom is more because its going from 725 to ~950, compared to 850 to ~950 in the case of the 5870
    Nice hypothesis. I never thaught of it. Thanks... and share your ideas on http://banglagamer.com/forums/f50/he...738#post154611 too.
    I am about to give them a spin for their pride and ain't gonna stop till all of it is proven in front of my own eyes.

    BTW Happy Birthday to you. May Allah (SWT) make it and the following days filled with knowledge and blessings, aamin.
    Last edited by Streamyx; November 18th, 2009 at 14:29.
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