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  1. #21
    Multiboxologist MiRai's Avatar
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    bob, I know you like to pick on me, but here's where I'm coming from.


    GPU Memory Interface Video RAM
    GTX 460 192-bit / 256-bit 1GB / 1GB
    GTX 470 320-bit 1.2GB or 2.5GB
    GTX 480 384-bit 1.5GB
    GTX 560 256-bit 1GB
    GTX 560 Ti 256-bit / 320-bit 1GB / 1.2GB
    GTX 570 320-bit 1.2GB
    GTX 580 384-bit 1.5GB or 3GB
    GTX 660 192-bit 2GB
    GTX 660 Ti 192-bit 2GB
    GTX 670 256-bit 2GB or 4GB
    GTX 680 256-bit 2GB or 4GB
    GTX 760 256-bit 2GB or 4GB
    GTX 770 256-bit 2GB or 4GB
    GTX 780 384-bit 3GB
    GTX 780 Ti 384-bit 3GB
    GTX Titan 384-bit 6GB
    GTX Titan Black 384-bit 6GB
    GTX 960 128-bit 2GB
    GTX 970 256-bit 4GB
    GTX 980 256-bit 4GB
    GTX 980 Ti 384-bit 6GB
    GTX Titan-X 384-bit 6GB
    GTX 1060 192-bit 6GB
    GTX 1070 256-bit 8GB
    GTX 1080 256-bit 8GB


    So, while I'm sure there is plenty of math involved, I think we can safely use a cheat sheet and say...

    GDDR5/X 128-bit/256-bit = 1/2/4/8/16/32GB
    GDDR5/X 192-bit/384-bit = 1.5/3/6/12/24GB


    The only GPUs which deviate from this are the older 192-bit x60 GPUs, which only came with 1GB or 2GB each. I also leave out the 512-bit memory interface because AMD is the only one who has used it in recent times, but it follows the same guidelines where it's just twice of the 256-bit interface.

    Quote Originally Posted by mbox_bob View Post
    HBM1 is 1024 bits wide.
    I was only going off of what AMD prints on their website, and what the sites which reviewed and benchmarked both the R9 Nano and R9 Fury X were stating, but I know very little about HBM beyond that.

    Quote Originally Posted by AMD
    Ground-breaking performance requires big bandwidth. AMD’s latest innovation delivers more than 3x the bandwidth per watt over GDDR5 along with a 4096-bit memory interface for incredible new advances in power and efficiency.
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  2. #22

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    .... I was just saying.

    I completely agree with your simplification; it was just that proposed 48GB card!!. You're going to start rumours.

    /e re: HBM
    In HBM1, each stack interface was 1024bits wide with 2Gb chips (256MB), 4 chips per stack (1GB per stack), the GPU memory controller interface was 4096bit, so, 4 stacks are needed.

    HBM2 looks to be coming in 1024bits (still), with 8Gb chips in 4 or 8 chip stacks (rumours from Samsung), i.e. 4GB per stack (currently), potentially 8GB in a stack! With a 4096bit GPU interface, and it will pave the way for 16GB or potentially 32GB cards.

    The math gets harder with HBM as you need to add in the number of chips per stack.
    Last edited by mbox_bob : 07-12-2016 at 05:45 AM Reason: felt like it

  3. #23

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    http://www.overclock.net/t/1604953/v...unch-in-august

    VR World is reporting that they've had hands-on time with the GP102-based GeForce GTX Titan card, with a few details on NVIDIA's new monster.

    NVIDIA's next-gen Titan X successor will feature both 8+8 and 8+6-pin PCIe power connectors, with the PCIe power connectors being found at the front of the card, and not on top. The 8+8-pin power connectors will provide up to 375W TDP, while the 8+6-pin version will provide 300W. Performance-wise, it should be a monster with around 50% more horsepower over the already lightning quick GTX 1080.

    The new Pascal-based Titan X successor will reportedly be 12 inches long, while the new Titan X successor will arrive in 12/16GB versions (as we've previously reported) rocking HBM2 memory. VR World's sources say that the new GPU is actually now bound by the CPU, with NVIDIA's engineers reportedly saying that even Intel's new Core i7-6950X isn't powerful enough to deliver the performance the new Titan cards need in enthusiast level scenarios.

    We should expect NVIDIA to unveil its new Titan P at Gamescom, which takes place in Cologne, Germany between August 17-21, 2016.

  4. #24

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    Quote Originally Posted by Pazgaz View Post
    while the new Titan X successor will arrive in 12/16GB versions (as we've previously reported) rocking HBM2 memory.
    Makes sense based on what they say about the 4096bit interface or 3072bit interface. Presumably the lessor interface will be because part of the memory controller is disabled (whether due to bad etching or just because).

  5. #25

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    Also, if you look at the rx480, some of the cards have all 8 mem chips with 4 disabled while still having the same mem interface as far as I know.

  6. #26
    Multiboxologist MiRai's Avatar
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    Quote Originally Posted by mbox_bob View Post
    I completely agree with your simplification; it was just that proposed 48GB card!!. You're going to start rumours.
    Well, we've already got GPUs with 24GB, so 48GB probably isn't all that far off, but I don't think I'd try to game on them (or even want to afford them).

    Quote Originally Posted by Pazgaz View Post
    Also, if you look at the rx480, some of the cards have all 8 mem chips with 4 disabled while still having the same mem interface as far as I know.
    I didn't say you can't have GPUs with two different amounts of VRAM on it, I said 12GB and 16GB were unlikely and I explained why. If you look at the table I created above you can see several different GPUs throughout the years which have had two different amounts of VRAM offered on it.

    The RX 480 has a 256-bit interface, so it's capable of having any of the following amounts of VRAM on it:

    GDDR5/X 128-bit/256-bit = 1/2/4/8/16/32GB
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  7. #27
    Multiboxologist MiRai's Avatar
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    The new Titan X has been revealed:

    http://videocardz.com/62498/nvidia-a...titan-x-pascal

    12GB of G5X, and it's $1200 USD; available August 2nd (direct from www.nvidia.com).
    Last edited by MiRai : 07-22-2016 at 03:53 PM
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  8. #28

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    Quote Originally Posted by MiRai View Post
    The new Titan X has been revealed:

    http://videocardz.com/62498/nvidia-a...titan-x-pascal

    12GB of G5X, and it's $1200 USD; available August 2nd.
    Wow! that seemed fast!?!? I wonder how long until 1080ti!
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  9. #29
    Multiboxologist MiRai's Avatar
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    Quote Originally Posted by Lyonheart View Post
    Wow! that seemed fast!?!? I wonder how long until 1080ti!
    If we go by the typical nVidia release schedule as of late, then I'd expect them to be released in October or November... just in time for the holidays.
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  10. #30

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    People are already saying this is a "small" Titan X (whatever that means) and that there will be another one later on (2017) with more CUDA cores and more RAM.
    As for the prices, that's what you get with zero competition.

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