dual Geforce GTX's on a Z800 ...anyone?

[bsheers2003]

anyone successfully running dual nVidia 1080's or better on an HP Z800?    I have 1110 W psu, but power cabling still a bit tricky, apparently...    and perhaps GPU driver choice might also be an issue.    (SLI not the issue, as purpose is only rendering, not gaming.)      thxs in advance for any experience...

[DGroves]

ok, again we'll go over this subject

HP "z" workstations do not support SLI on ANY nvidia consumer model cards

HP supports SLI on a "SELECT FEW" models of quadro cards, other quadro models are not supported

while HP only supports some model in ATI's  professional line of cards, most of them should work regardless of make/model because ATI unlike nvidia does not place artificial restrictions on dual video card use

as for power use, simply look at the HP specced configs, and note the total wattage used, as long as you stay under this it should work fine

keep in mind that both ATI/NVIDIA are removing multi GPU support for most games/applications in newer drivers and card models as it makes more sense nowadays to buy a newer single card rather than two older video cards

if not wanting to use two video cards in sli, but one as video and one as a coprocessor then yes you can do this, but your application has to support using the sec card as a coprocessor or a dedicated model coprocessor card

[bsheers2003]

thxs so much for the reply...    yes, as my message hopefully clarified, SLI is NOT the issue..   don't need or want it.    just co-processing, and am told Daz3D software supports this...    but the proble witm is more exact.   it's the cabling that has me perplexed.   even getting just one GTX 1080Ti to run requires some creative splitting/joining to match the GPU card females.     ...but to get a 2nd 1080Ti to run will require further pre-splitters , so to speak, to that I end up with enough output male plugs for both card's females.    the stock Z800 not being too generous with its plugs, as it were....       this is where I need some exact solution advice...      is like at your home, when you wonder if you might not be overloading a local living room socket by adding too many adapters for all the vintage stereo and video components you might like to run...      is that an issue even though the 1110w PSU has more than enough wattage for the dual GPU's being considered?         thxs much !!!

[DGroves]

I personally would not try to run dual 1080 TI's as the TI's draw over 250 watts each 

if you do go this route pay attention to the three 6pin GPU plugs, two of them are on one rail and the third is on another

look at the power supply or the service manual for id'ing the supply rails

you want to use the six to eight pin adapters so each eight pin adapter is on a seperate rail

the last six pin adapter will use a single to dual six pin adapter

look for high quality NAME BRAND adapters, the HP ones are expensive but are of the highest quality, no name adapters can use thinner copper wires and substandard metal mating connectors

if you are only using one cpu and one memory module in each of the 3 channels and one HD and nothing else then the 1100/1200 supply should be fine

again keep in mind that the z800 pwr supply is a multi rail design not a single rail, as such it's possible to overload the GPU rails while being well under the supply's TOTAL 1100/1200 wattage

last the nvidia 2070 super draws 215 watts max and can be run on a z800 using a 1100/1200 watt supply