Hi Olivier,

thanks for the first hand information! That´s impressive.

The Titan Z draws up to/around 350W from it´s combined powersupplies (PCIe+2x8pin).

Must be fun to GPU render with that card. Also probably 20%-30% cheaper than 2xTitans.

I found a Tom´s Hardware Article that has info on Power Supply Specifications. It´s from 12/2011, there is a chance there´s been updates but it it´s a good read:

http://www.tomshardware.com/reviews/power-supply-specifications-atx-reference,3061-12.html


Cheers,

tim








Am 30.12.2014 um 23:52 schrieb olivier jeannel:
Hey Tim,
I Have a Z620 (smaller than a Z820) running with a TitanZ inside.
For such big card I had to convert both PCIe6 pins into 2 PCIe8 pins connectors. I did this after I ask to my official HP reseller, and he did confirm that it wasn't a problem.
It's running fine here.




Le 30/12/2014 21:09, Tim Leydecker a écrit :
Regarding the HPZ820 and the 1100+W PSU, I would have hoped for a
better structured HP homepage, making it easier to find out if splitting
a 6pin into two 6 pin (or 6pin and 6pin+2 for a GTX980) would work
or stress the lane(s) beyond it´s limit.

The HP 8xx´s generally don´t provide dangling Molex connectors, btw.

There is loads and loads of information burried somewhere but what is missing
is a simple button labeled CONTACT FOR INFORMATION.

I would want to ask, do you have a cable set for a HP8xx series PSU that will
give me 4x6pin and if so, how much?

Those machines cost a couple of a thousand dollars/euros but it´s proven
easier to find gaming component related hardware&setup information in
the depths of the internet.

In conclusion, that´s why I wanted to share and point out that there is a good
chance to run two GT970 cards (w/175W consumption each) using a clever
combination of a cable kit + an extra Y splitter but I wouldn´t want to pull
loads of Watts trough the split 6pin connections either.

I´d think 2xGPU á la GT970 would be stable BUT

for a brute force level 4xGPU machine, I´d also look for another mainboard+PSU+cooling+case


Anyway, personally, I´ll wait for a GTx9xxTI now...


Cheers,

tim





Am 30.12.2014 um 16:45 schrieb Raffaele Fragapane:
Damn premature sends! If you go molex to 6pin make sure it's with a dual molex adapter, while good PSUs can deliver a lot more on them, standard molex spec is 40W, while 6pin is 75W.

On Wed, Dec 31, 2014 at 2:42 AM, Raffaele Fragapane <raffsxsil...@googlemail.com <mailto:raffsxsil...@googlemail.com>> wrote:

    800W PSU not CPU, though a CPU with an 800W TDP would be
    interesting to cool :p

    On Wed, Dec 31, 2014 at 2:30 AM, Raffaele Fragapane
    <raffsxsil...@googlemail.com
    <mailto:raffsxsil...@googlemail.com>> wrote:

        Splitting the outlet might or might not work out for you.
        While it's touted as a feature a large majority of high
        output PSUs are multirail because it's generally cheap to
        provide multiple stable lines than one large pipe
        distributed arbitrarily over N cables.

        What that boils down to is that if you have an 800W CPU, but
        it's a multirail with the 6pin on a 120W necked line (hard
        coupled), and you fork it to two videocards for a 200W pull,
        you are going at the very least to run a very hot PSU, and
        at the worst to set it on fire :p

        And if you think Dell or HP use premium components,
        especially for the PSUs, think again, more often than not
        even their workstation grade components have been, at one
        point or another, extremely subpar.

        You can always convert another rail if you have a multi
        rail. 6pins aren't anything magic, they still run two or
        three sublines like anything else and a molex on a spare
        rail should be convertible to 6pin. If you have a quality
        single rail PSU, you should be able to safely split.

        On Tue, Dec 30, 2014 at 10:56 PM, Tim Leydecker
        <bauero...@gmx.de <mailto:bauero...@gmx.de>> wrote:

            It´s good to write things like this, I guess.

            A minute later I found the HP part number:

            Hewlett Packard 6PIN TO DUAL-6PIN GRAPHICS ADAPTER
            F5J05AA

            This let´s you split a 6pin connection to 2x6pin.

            --

            Similar adapters are available from 3rd party vendors.

            I can´t tell how well this would work when using "hot"
            nVidia 7xx range cards
            but the gt 970 cards are spec´d for needing roughly
            150W, drawing around 180W in
            actual test scenarios.

            --

            I´d guess that would allow a stable 2xGPU system (using
            a HP 1100+W PSU)
            but for a 3-4xGPU system, I´d actually revert my
            suggestion and go home/custom built.

            Cheers,

            tim




            Am 30.12.2014 um 12:04 schrieb Tim Leydecker:
            I was suggesting to also look into refurbished HP
            Z800/Z820/Z840 workstations
            as a basis for building a multi-GPU plattform.

            There is a grain of salt.

            Most if not all graphics cards come expecting an
            additional 2x6pin power supply,
            e.g. 75W from the PCIe slot, plus 75W from each 6pin
            connection, there are
            Quadro cards that are spec´ed for 150W power
            consumption but most
            gaming cards will excess that 150 W drain limit.

            You´d need at least 4 6pin connections for 2 gaming cards.

            The HP Z8++ series may present problems because of the
            way the PSU provides
            these 6 pin connections in a vendor specific cable kit.

            There are several cable kits available but I haven´t
            found a 4x6pin kit sofar.
            This could be a dissapointment for anyone looking into
            get such a plattform.

            Of course, there is a chance I missed something from
            the datasheets and spare parts
            listings, as well as a chance the HPZ840 doesn´t have
            such a limitation.

            Worth mentioning anyway.

            Cheers,

            tim
            Am 12.12.2014 um 12:14 schrieb Angus Davidson:
            Worthwhile noting that Octane works with the GTX 9XX
            cards very well. It also has a really good Network GPU
            support. Which means you dont need to cram 4 cards
            into one machine. If you dont know what you are doing
            the machine can go *Poof* very easily.




            
------------------------------------------------------------------------
            *From:* Tim Leydecker [bauero...@gmx.de
            <mailto:bauero...@gmx.de>]
            *Sent:* 12 December 2014 12:42 PM
            *To:* softimage@listproc.autodesk.com
            <mailto:softimage@listproc.autodesk.com>
            *Subject:* Re: Best graphic card for Softimage?

            Hi,


            I would also like to recommend a nvidia gtx 9xx card,
            the available cards
            (970&980) have a lower power consumption compared to a
            7xx series card.

            Aside from that, I would like to point out nvidia CUDA
            support, which might
            help in a couple of programs, be it redshift or 3d
            coat or the latest nvidia games
            related tools (fluids, cloth, physics, etc for Maya).

            If you have to invest now, e.g. immediately, I´d
            suggest a 970 4GB card and
            downloading a redshift demo to see if it would benefit
            your workflow.

            If you can wait a bit longer, I´d suggest waiting for
            a successor to the 780ti or
            Titan (Black) nvidia cards, expected early next year,
            mostly because of the
            more RAM expected to come with these cards, which
            would give you more
            headroom for heavy scene handling (e.g. shitloads
            geometry and raytracing).

            There is a lot of new stuff coming early next year,
            including Houdini and Nuke
            versions more accessible due to licensing
            changes/options.

            In general, I would split my money between system RAM,
            ssd and graphics unit,
            expecting to work happy with a 128-256GB system OS
            partition, 64GB ish RAM,
            and a gt(x) 9xx ish card with at least 4GB VRAM (6-8GB
            prefered).

            Making sure that your system has a 800+ Watts PSU will
            help stability.

            >From there, finding redshift attractive, you could
            always add another card to
            your system, devoting it to getting more out of a
            single render license or even
            go fully committed and swap your mainboard to a
            4x16PCIe version, adding
            even more cards.

            This implies a tower workstation case and enjoying
            building your hardware.

            Alternatively, I can recommend looking into
            refurbished HP Z800/820 or Dell T7500/7600
            workstations (on ebay) to get an idea about prices,
            performance and extension options.

            These plattforms are well enough documented  to find a
            solid, not to loud machine
            that will reliable work 24/7 with a reasonably sized
            PSU and at least a 2x16PCIe
            graphics option.

            There´s caveats with maximum system RAM or the PSU in
            some of those refurbished machines
            but they tend to be solid machines, well designed.

            If all of the above is too much information for you:

            Get a gt 970 card. They are the best bang for the buck
            nvidia´s atm.


            Cheers,


            tim















            Am 12.12.2014 00:09, schrieb Tim Crowson:
            I have a 970 for my home system and it's fantastic.

            -Tim


            On 12/11/2014 3:34 PM, David Rivera wrote:
            GTX 9XX it´s the way to go, packed with another $600
            on Redshift.
            Thanks. :)
            *David Rivera*
            /3D Compositor/Animator/
            LinkedIN <http://ec.linkedin.com/in/3dcinetv>
            Behance <https://www.behance.net/3dcinetv>
            VFX Reel <https://vimeo.com/70551635>

            
------------------------------------------------------------------------
            *From:* Mirko Jankovic <mirkoj.anima...@gmail.com>
            <mailto:mirkoj.anima...@gmail.com>
            *To:* "softimage@listproc.autodesk.com"
            <mailto:softimage@listproc.autodesk.com>
            <softimage@listproc.autodesk.com>
            <mailto:softimage@listproc.autodesk.com>
            *Sent:* Thursday, December 11, 2014 2:32 PM
            *Subject:* Re: Best graphic card for Softimage?

            "How long can you can your computer on with this
            card in it?"

            Sry but clarification please?

            On Thu, Dec 11, 2014 at 2:28 PM, <hk-v...@iscs-i.com
            <mailto:hk-v...@iscs-i.com>> wrote:

                How long can you can your computer on with this
                card in it?
                On 2014-12-11 05:36, Mario Reitbauer wrote:
                Got the msi gtx 970 gaming 4g.
                Quite happy with it.

                2014-12-11 10:03 GMT+01:00 Mirko Jankovic
                <mirkoj.anima...@gmail.com
                <mailto:mirkoj.anima...@gmail.com>>:

                    right now 970 is best bang for backs.
                    they do not heat too much, power
                    consumption is prety low and they do really
                    good job.
                    and on top of that Redshift as perfect
                    companion ;)
                    viewport performance is not that big issue
                    at all between two cards but being able to
                    utilise GPU rendering with CUDA is way more
                    higher on the list then couple more FPS in
                    viewport

                    On Thu, Dec 11, 2014 at 9:26 AM, Christoph
                    Muetze <c...@glarestudios.de
                    <mailto:c...@glarestudios.de>> wrote:

                        I'd stay clear of the ATI/AMD consumer
                        cards if I were you. From our
                        experience Soft becomes generally less
                        stable (crashing a lot more), and
                        the raycast selection is going haywire
                        sometimes.

                        Chris

                        On 11/12/14 04:44, phil harbath wrote:
                        > I went Redshift and have been very
                        pleased.  I can get by using a lot less
                        computers than before on most projects,
                        volume smoke is pretty much all I use
                        MR for anymore.  I have several
                        computers with a combination of 780TI,
                        770, and 970, while I think the 780Ti
                        give the best performance, it really
                        makes more sense to buy the 970 as they
                        are priced better or 980 if you have
                        more cash.  The Redshift say go with
                        the cards with the most ram (that would
                        be Titan 6tb, if you got even more
                        cash), depends on your needs of course.
                        >
                        > From: David Rivera
                        > Sent: Wednesday, December 10, 2014
                        8:51 PM
                        > To: Softimage Mailing List
                        > Subject: Best graphic card for Softimage?
                        >
                        > I know this subject has been posted a
                        lot over the years, but it happens that
                        I read a benchmark performance between
                        autodesk products on certain webpage.
                        They tested Radeons vs Nvidias and
                        turns out that Mudbox and Softimage ran
                        better on AMD (Radeons) - this is
                        mental ray render.
                        >
                        >
                        > So I was wondering whether to go full
                        on mental ray (CPU) or take my savings
                        and put it on a GPU renderer? Either
                        case, now a days, which is the middle
                        ranked graphic card for softimage? (My
                        budget is around 1k).
                        >
                        >
                        > Thanks.
                        >
                        > David Rivera
                        > 3D Compositor/Animator
                        > LinkedIN
                        > Behance
                        > VFX Reel
                        >





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-- Our users will know fear and cower before our software! Ship it!
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