Two different cards on one PC?

mborkp wrote on 3/20/2015, 7:30 PM

Hi guys,
to cut story short, I've GTX 780Ti on my system and the rendering with Vegas 13 pro using MainConcept codec is not possible while Cuda is enabled in preferences.
PC runs out of memory (got 16Gb) and crushes, rendering stops half way (CPU slows to almost zero) and so on. With the Cuda turned off, all is going good.

So my question is, is it possible to get amd card and add it to the system to use OpenCL (two cards in one PC) for rendering? Will that work?
Thanks

Comments

john_dennis wrote on 3/20/2015, 9:42 PM

It is [I]possible[/I]. If you search the forum you will find others who have used more than one card. The number of potential hassles you have to contend with increases geometrically.

mborkp wrote on 3/21/2015, 2:46 AM

Yes I did search, but there is huge amount of pages popping out. I tried quite few but not what I want to find out. I was hoping someone tried/running that combo and can tell me how it goes. Thanks anyway.

OldSmoke wrote on 3/21/2015, 7:37 AM

I did use a GTX580 together with an AMD HD6970 and it worked flawless. In the past Nvidia and AMD drivers would clash but is long gone and they can coexist.

Keep in mind that you need a system that can actually handle 2x PCIe x16 such as socket 1360, 2011 and 2011-v3, others will fall back to 2x PCIe x8.

mborkp wrote on 3/21/2015, 10:34 AM

I do have LGA2011 so that is great news,
Thanks!

BTW, do you need to specify somewhere which card to use for render or it all happens automatically?

Appreciate your feedback :)

OldSmoke wrote on 3/21/2015, 11:00 AM

The only two codecs that allow selection of GPU acceleration are MC AVC and Sony AVC. However, these are written for the older generation cards, Nvidia up to 5xx and AMD up to HD 7950.

You also must specify under preferences which card you want to use for general acceleration.

mborkp wrote on 3/21/2015, 11:28 AM

My friend offered me 7980 for free. .. but it may not work in this case. ... We will see.
Sony seems to be very slow to keep up to date with the new hardware, what a shame.

Thanks

mborkp wrote on 3/22/2015, 5:19 AM

I've found in my "junk stuff" old AMD5670, would that be any benefit to use it with Vegas?

Thanks

OldSmoke wrote on 3/22/2015, 7:39 AM

The HD5670 isn't powerful but will work, I am just not sure how much acceleration you will get from it. I had a HD6970 and that was on par with my GTX570 at that time.

mborkp wrote on 3/24/2015, 1:22 AM

@OldSmoke,
I've decided to wait till the HD6970 arrives. The reason being is that to add the card is a bit of work for me. My PC location is not easily accessible so I decided to wait. Should I install recent drivers or is there any particular version recommended?
Thanks

Byron K wrote on 3/24/2015, 3:03 PM

Pls keep us posted on your results. I was also thinking about adding an AMD w/ my NVIDEA so I can have CUDA for software that uses CUDA and the AMD for Vegas.

OldSmoke wrote on 3/24/2015, 3:29 PM

Byron K

Actually you can have both for Vegas. You can set the AMD card under preferences for timeline performance and still use MC AVC with CUDA; in fact that is a very fast combination.