2*1650 vs 1*1080 for rendering

[nima_25]

Hi all.

I have just started learning Cinema 4d. I have a 1650 i was wondering if buying another 1650 would double the rendering speed. also comparing it to 1080 does it mean that two of 1650 are 80 percent fast as a single 1080?

[Deuxez]

while i dont know if they will be faster than a 1080, i do know that they probably wont "dubble" the speed as every other sli/crossfire setup, but you will see some performance boost.

[Jurrunio]

1. WHY WOULD YOU BUY A CARD WITH 1650 IN THE FIRST PLACE

 

2. It depends on whether your renderer of choice can use and how well it uses multiple GPUs, or is it mostly CPU based.

 

3. It most likely wont get you 80% speed of a 1080. Even the best multi GPU scaling still has some penalty to overall performance.

[Streetguru]

18 minutes ago, nima_25 said:

Hi all.

I have just started learning Cinema 4d. I have a 1650 i was wondering if buying another 1650 would double the rendering speed. also comparing it to 1080 does it mean that two of 1650 are 80 percent fast as a single 1080?

What is your base System and budget/country?

RX 480/580 8GBs are likely the best cards to go for, and they're like $100 used in the US anyways.

 

Otherwise maybe look for a 1080ti for the extra VRAM, or even a used Vega FE card for it's 16GBs of VRAM.
 

 

[SnowyMus]

11 minutes ago, nima_25 said:

Hi all.

I have just started learning Cinema 4d. I have a 1650 i was wondering if buying another 1650 would double the rendering speed. also comparing it to 1080 does it mean that two of 1650 are 80 percent fast as a single 1080?

For something specific like Cinema 4D, I'd look more at specific benchmarks regarding those GPUs than an aggregate like UserBenchmark, because UserBenchmark takes many different use cases into account where you only care about one use case.

 

As for what you'd get, it'll probably come very close to around 2x performance. I still wouldn't buy a second 1650 as it's just too expensive for what small improvement you'd get. You'd get much more for your money by just buying the 1080 or by buying a cheaper card like an RX 470. And no, two GTX 1650s won't be 80% the performance of one GTX 1080.

 

Of course, if you're just starting out, maybe you should hold off before you buy more expensive hardware.

[Streetguru]

8 minutes ago, VegetableStu said:

again, depends on renderer.

although there's AMD ProRender, but my point is look up the software before you buy hardware. not the other way around.

Ya, but that one supports openCL well enough, and the 480s/580s happen to be the cheapest cards with decent performance and 8GBs of VRAM, which seems important for these kinds of things.

[nima_25]

Thank you all. Octane does not support amd cards. so i had to choose an nvidia card.

1650 looked good also it was cheaper than 1050 at the time. i thought it would have much better resale price.

I am not sure I might sell 1650 and get a 1070. 

 

Octane GPU results. https://render.otoy.com/octanebench/results.php?v=4.00&sort_by=avg&filter=&singleGPU=1

 

 

[Jurrunio]

5 minutes ago, nima_25 said:

1650 looked good also it was cheaper than 1050 at the time. i thought it would have much better resale price.

For how much? Because 1050's high price is mostly caused by its end of production status.

 

5 minutes ago, nima_25 said:

I am not sure I might sell 1650 and get a 1070. 

A single faster GPU is always better, even tho Octane does use multiple GPUs well.

[Streetguru]

2 minutes ago, VegetableStu said:

more renderers out there (only) work on nvidia GPUs (that's what being stagnant for so long gets you), so if you want that kind of flexibility or even raw performance in a few cases...

Some things are cuda only yes, but not cinema 4d aside from some plug ins. Or Blender, both have support for AMD's pro renderer don't they?

 

and it's really hard to beat the value of used RX 580s

[Streetguru]

2 minutes ago, Jurrunio said:

For how much? Because 1050's high price is mostly caused by its end of production status.

 

A single faster GPU is always better, even tho Octane does use multiple GPUs well.

I'd maybe only go for a single GPU if it has more VRAM like a 1080ti