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Thread: AMD - Bulldozer Chitchat

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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by CAT-THE-FIFTH View Post
    It still seems very unusual to downclock 2000MHZ and 2133MHZ RAM to 1333MHZ especially for a CPU which supports 1600MHZ and 1866MHZ RAM.

    At least Anand said in the comments that he would use faster RAM now in the actual review.

    However,he was quick to change the HD3000 results in the preview with newer drivers (someone pointed it out to him today that there were newer Intel drivers) so why not retest A8 processor in the preview with faster RAM? Even the review of the motherboard says that Catalyst 10.12 drivers were used. Why is he using such an old version?? The latest versions are Catalyst 11.4 and 11.5b AFAIK.

    Also,what versions of the HD5570 and HD6450 were used?? If the GDDR5 versions were used it is pointless as these are not that common. At least Toms Hardware said they used an HD5570 DDR3.
    Sounds like theres conspiracy going on

    m

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    Re: AMD - Bulldozer Chitchat

    It seems AMD demoed a laptop running the Bulldozer based Trinity:

    http://semiaccurate.com/2011/06/14/a...rinity-laptop/


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    Re: AMD - Bulldozer Chitchat

    Anandtech retested the A8 with faster DDR3 RAM:

    http://www.anandtech.com/show/4448/a...ance-preview/3

    The difference is massive!!

    Considering that the HD6550D has the GPU running 20% lower than that of the HD5570,there seems to be little performance loss if fast DDR3 RAM is used.


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    Re: AMD - Bulldozer Chitchat

    I'm not surprised really, this is basically a discrete GPU so will be very RAM instenstive.

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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by CAT-THE-FIFTH View Post
    Anandtech retested the A8 with faster DDR3 RAM ...
    Holy ...... words fail me (publishable ones, anyway!).

    Mind you, I shouldn't be surprised: The HD4650 was massively bandwidth bottlenecked (as demonstrated when Sapphire released a DDR3 version) and that's a very similar GPU design to this, so I guess it's expected that pushing the RAM clocks on an A8 through the roof would result in something very similar.

    Shame the A8-3500M only officially supports 1333MHz DDR3 - no speed boost for the 35W mobile version


    EDIT: although yeah, not surprising. I noticed something similar when Hexus tested the 780G chipsets: their original test used an Athlon X2 4850e, so HT1: when they retested alongside a 790GX they used an Phenom X4 - i.e. an HT3 processor - and the results for the 780G jumped more than 20% thanks to the higher bandwidth available throuigh the HT3 link. What really holds / held AMD IGPs backwas bandwidth: I assume that's why they didn't bother updating beyond the HD3200 in future iterations: they knew they were bandwidth limited so the extra tarnsistors would go to waste...
    Last edited by scaryjim; 15-06-2011 at 11:02 AM.

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    Re: AMD - Bulldozer Chitchat

    From the comments: http://www.anandtech.com/show/4448/a...ance-preview/3



    But why would they retest that if they're so rampantly Intel fans?

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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by CAT-THE-FIFTH View Post
    Anandtech retested the A8 with faster DDR3 RAM:

    http://www.anandtech.com/show/4448/a...ance-preview/3

    The difference is massive!!

    Considering that the HD6550D has the GPU running 20% lower than that of the HD5570,there seems to be little performance loss if fast DDR3 RAM is used.
    Wow! Nearly a 40% increase across the board. Not bad for a 40% Increase in Memory bandwidth.
    This shows the GPU is only limited by the RAM. I suspect going to 2133 RAM will see a further 15% increase.

    Llano, compared to a Core i5 goes from being a very weak CPU with a GPU that wipes the floor with the Intel chip to having a very weak CPU with graphics that that deny intel the right to call what they have on hteir CPU a GPU.

    I wonder if they'll introduce sideport memory or maybe a shared L3 cache between the CPU and GPU for the next gen?
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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by badass View Post
    I wonder if they'll introduce sideport memory or maybe a shared L3 cache between the CPU and GPU for the next gen?
    Hard to see how they'd do sideport: they'd have to give the GPU its own memory bus & controller and that's going to increase the complexity of the die and also mean more traces, so a new socket. Similarly, while I can see them bringing in L3 for the CPU, I'm not sure that they could put enough cache on the die to make it worth sharing it with the GPU: but a decent L3 for the CPU should reduce the CPU's need to use the main memory, allowing more bandwidth to be allocated to the GPU.

    I'd assume the next step will be faster memory, tbh: perhaps quad rate or double bit rate memory a la GDDR5 (don't know how quad rate memory is progressing for the desktop?).

    Interesting how the Llano release has pushed bulldozer out of this thread though

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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by kalniel View Post
    But why would they retest that if they're so rampantly Intel fans?
    A lot of people had pointed it out??

    BTW,where did the A8 results for 1600MHZ DDR3 RAM and at 1680X1050 come from?? The Anandtech preview did not test the A8 using 1600MHZ DDR3 and at 1680X1050. I looked at the comments and could not find the link!

    Edit!!

    It seems to be a leaked slide from the A8 review!
    Last edited by CAT-THE-FIFTH; 15-06-2011 at 11:29 AM.


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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by kalniel View Post
    But why would they retest that if they're so rampantly Intel fans?
    They're not usually, which is why it was so surprising really. But like I said Anand does pay attention to comments and will correct stuff like this.

    @badass: I don't see how it's a 'very weak CPU'. It's not meant to be an i7 killer, it's still a K10 derived chip and they've done a very impressive job with power draw and transistor density. I.e. instructions/watt. Just because it doesn't wipe the floor with a 2600k doesn't mean it's pointless. For the mainstream it's more than enough, and as AMD showed by delaying Bulldozer in favour of this, mainstream is more important to a chip maker than the few enthusiasts or those who are mislead by a salesman into thinking they need a 980X for web browsing.
    Last edited by watercooled; 15-06-2011 at 11:34 AM.

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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by CAT-THE-FIFTH View Post
    ... Anandtech did not test the A8 using 1600MHZ DDR3 and at 1680X1050.
    Apparently they did: Anand posted a link in the comments thread on the article - currently on page 2 about half way down

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    Re: AMD - Bulldozer Chitchat

    TBH,in multithreaded applications an Athlon II X4 or Phenom II X4 tend to have similar speed or even greater speed to a Core i3. It is only single core performance which is lower and I cannot fathom why AMD has not implemented Turbo Core on desktop Llano processors.


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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by CAT-THE-FIFTH View Post
    TBH,in multithreaded appliccations an Athlon II X4 or Phenom II X4 tend to have similar speed or even greater speed to a Core i3. It is only single core performance which is lower and I cannot fathom why AMD has not implemented Turbo Core on desktop Llano processors.
    battery and heat innit

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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by cat
    I cannot fathom why AMD has not implemented Turbo Core on desktop Llano processors.
    Quote Originally Posted by krazy_olie View Post
    battery and heat innit
    For a desktop system? Explain please!

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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by CAT-THE-FIFTH View Post
    ... I cannot fathom why AMD has not implemented Turbo Core on desktop Llano processors.
    Lack of TDP budget? Poor yield at GF means they can't bump the clock speeds above 3GHz without the power draw running away with itself?

    Perhaps we'll see a "T" series in a few months time as they smooth out the manufacturing process: after all, the early Phenom IIs topped out at 3.2Ghz but they got them up to 3.7 / 3.8GHz after a couple of years...

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    Re: AMD - Bulldozer Chitchat

    Quote Originally Posted by scaryjim View Post
    Lack of TDP budget? Poor yield at GF means they can't bump the clock speeds above 3GHz without the power draw running away with itself?

    Perhaps we'll see a "T" series in a few months time as they smooth out the manufacturing process: after all, the early Phenom IIs topped out at 3.2Ghz but they got them up to 3.7 / 3.8GHz after a couple of years...
    Isn't second generation Turbo Core meant to switch off cores?? If the laptop Llano processors have this then the functionality must be present in the desktop ones. Even a 300MHZ to 400MHZ across two active cores increase would be useful.


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