PSU 600W 1GTX 780 + which GTX ? Tweet

[maxwaver]

Hi guys,

I bought recently a HP z420 workstation which ship with a qudro 410 graphic card.

Considering to use is for heavy GPU rendering using OCTANE render i removed the entry level 480 and bought an ASUS GTX 780 scu which is giving an amazing results with it 2400 cuda cores ...
Now that i'm thinking to add another GTX i'm wondering which one i could add considering my low PSU 600 W power capacity.

I was thinking of A GTX 760 which could eat up to 170 W .

I would to point that i used both of the available PCI power connector on the GTX 780, so if the the PSU support another card how i could be supplied with power.


My pc config now is ;

Intel Xeon e5 3.6 quad core.

24 GB ram ECC

2 x SATA HD 500 GB

Asus GTX 780 SCU 2 OC

Thanks in advance guys.

[slepy8]

you're at the limit bro'...
no more havy power cards. or get some low power ones but they might be a waste of money..

Suggestion - get a stronger PSU first.

780 takes 250W - you have 350W left at full load of GPU. system wold take up to about 200W. It's 150W left. But you're not sure of correct numbers. So it's a lotery.

[maxwaver]

Thank you very much slepy8, actually i was thinking to add a GTX 750ti regarding its low power consumption ( max60W ) but after browsing the form i discovered that its not supported yet by octane due to its recent Maxwell GPU architecture, it's 650 cuda cores could give a nice addition to the 2304 in the GTX 780 ...
Hopefully it will be supported...

So is the 750ti 60w is fine for my actual PSU ?????it can let the system run comfortably or it's will make it running on the limit ?

Thanks.

[Pschelfh]

You could use the additional card just for the viewport and disable it for rendering, that way it should require less power to run.

I have a GTX 760 (viewport) + GTX 780 (rendering) running on a 750W PSU. While it's tempting to use both (I already tried, and there's definately a speed boost!), I try to keep it save with only the GTX 780 for rendering, and also because it has 6 Gb vs 2 Gb on my GTX 760.

Peter.