OTOY Forums

Anyone having trouble with the scene kicking out using the 9800?

Hi,

an FX 9800 does'nt exist,
are you talking about a Geforce 9800 GT or 9800 GTX ?

Those cards should work fine.

Radiance

Hi Radiance!

First of all congratulations for your effort.

I have the nvidia 9800 gtx 2 and i i cannot understand if the octane use only the one of two gpus.
I say that because in the octane's device manager shows the two gpus in the list.
Is there any chanse to use the memory of both gpus?

Thanks...

Hi,

The current DEMO versions don't support multiple GPU's...

Radiance

Thank you!

radiance wrote:Hi,

The current DEMO versions don't support multiple GPU's...

Radiance

Stupid question but how does multiple GPU benefit the Octane end user when it gets supported? From what i understand the scene/render data gets duplicated unto both GPU VRAM, so your not effectively getting a 2X as far as storage(VRAM)?

You will have all available cores (ALUs) for the computation available.

For example:
GTX 260 216sp 896MB + 9800GT 512MB will give you 328 (216+112) cores and 512 or 896 MB VRAM for computations in Octane. You will have to choose your primary card whose VRAM will be used for storing the model/s, the materials and the buffer for the picture/frame information you want to render, though.

haste wrote:You will have all available cores (ALUs) for the computation available.

For example:
GTX 260 216sp 896MB + 9800GT 512MB will give you 328 (216+112) cores and 512 or 896 MB VRAM for computations in Octane. You will have to choose your primary card whose VRAM will be used for storing the model/s, the materials and the buffer for the picture/frame information you want to render, though.

So if i buy 2 GTX 480(512 core+512 core) and SLI them, my Octane render should be 2 times faster then a single GTX 480? If thats the case, awesome! i might have to buy 2 fermi now...

Yes. Your render will be twice as fast as with only one GTX 480.

The trick is that you do not need to connect, through SLI, the both cards. That gives the following follow-ups:
1. For cards like GTX 295, that have two chips on one platine, Octane will see (and use) only one of those chips. Thus, do not buy such a card, at least until further notice;
2. You could buy a GTX 470 and a GTX 480, and use both with Octane without problem, because Octane do not need the SLI bridge;

haste wrote:Yes. Your render will be twice as fast as with only one GTX 480.

The trick is that you do not need to connect, through SLI, the both cards. That gives the following follow-ups:
1. For cards like GTX 295, that have two chips on one platine, Octane will see (and use) only one of those chips. Thus, do not buy such a card, at least until further notice;
2. You could buy a GTX 470 and a GTX 480, and use both with Octane without problem, because Octane do not need the SLI bridge;

Awesome, thanks for the information!