OTOY Forums

Hi

What is the most important for GPU rendering performance?
CUDA cores? memory amount? core clock? amount of RAM in host?

Best Regards
Mateusz Blaszka
IT Administrator
Soul and Mind Group

it depends on a few factors, but a GFLOPS rating is the best way to determine speed.
you can find these on the wikipedia geforce pages.

Radiance

radiance wrote:it depends on a few factors, but a GFLOPS rating is the best way to determine speed.
you can find these on the wikipedia geforce pages.

Radiance

http://en.wikipedia.org/wiki/GeForce_200_Series

http://en.wikipedia.org/wiki/GeForce_400_Series

Then it means I would see no difference in octane if I change from a gtx260 to a gtx465 ?

It's the card I was going to buy and since it has twice the number of cuda cores of a gtx260 I was expecting...

sam75 wrote:

radiance wrote:it depends on a few factors, but a GFLOPS rating is the best way to determine speed.
you can find these on the wikipedia geforce pages.

Radiance

http://en.wikipedia.org/wiki/GeForce_200_Series

http://en.wikipedia.org/wiki/GeForce_400_Series

Then it means I would see no difference in octane if I change from a gtx260 to a gtx465 ?

It's the card I was going to buy and since it has twice the number of cuda cores of a gtx260 I was expecting...

there is a big speed difference between 200 and 400 series as these have a cache, they are more suited for applications like octane.
for all 200 series and lower, the GFLOPS is a relative measurement of speed. but for GTX400 series, the GFLOPS is not compareable to the older ones,
you'll have much better performance with the same amount of GFLOPS.

Radiance

radiance wrote:

sam75 wrote:

radiance wrote:it depends on a few factors, but a GFLOPS rating is the best way to determine speed.
you can find these on the wikipedia geforce pages.

Radiance

http://en.wikipedia.org/wiki/GeForce_200_Series

http://en.wikipedia.org/wiki/GeForce_400_Series

Then it means I would see no difference in octane if I change from a gtx260 to a gtx465 ?

It's the card I was going to buy and since it has twice the number of cuda cores of a gtx260 I was expecting...

there is a big speed difference between 200 and 400 series as these have a cache, they are more suited for applications like octane.
for all 200 series and lower, the GFLOPS is a relative measurement of speed. but for GTX400 series, the GFLOPS is not compareable to the older ones,
you'll have much better performance with the same amount of GFLOPS.

Radiance

based on this http://en.wikipedia.org/wiki/GeForce_400_Series can you tell how performs the much cheaper gtx465 compared to a gtx480 ?

sam75 wrote: based on this http://en.wikipedia.org/wiki/GeForce_400_Series can you tell how performs the much cheaper gtx465 compared to a gtx480 ?

No idea, we haven't heard of any reports about these new GTX465 yet.

Radiance

I ll tell you once I get it

thank you

a GTX 465 has around 60-65% from the performance of a GTX 480. But, it comes with just 1 GB of ram, the extra 512 MB of the 480 will really help in larger projects.

Florinmocanu wrote:a GTX 465 has around 60-65% from the performance of a GTX 480. But, it comes with just 1 GB of ram, the extra 512 MB of the 480 will really help in larger projects.

What do you think, what amount of ram on card will be enough for IMAX resolution (10,000×7000) projects? 2? 4? 6? 24GB?

soulandmind wrote:

Florinmocanu wrote:a GTX 465 has around 60-65% from the performance of a GTX 480. But, it comes with just 1 GB of ram, the extra 512 MB of the 480 will really help in larger projects.

What do you think, what amount of ram on card will be enough for IMAX resolution (10,000×7000) projects? 2? 4? 6? 24GB?

currently only tesla cards with 4GB and i'd wait a bit until fermi based cards are available with more than 4GB ram.
We also need to make some modifications to octane in order to render larger than 4096x4096

Radiance