GT120 + GTX 470 No performance boost

Hello folks, I had davinci on 1 GPU only , "GTX 470" and i had around 15-20 FPS , without any correction applied. RED 4K scaled to HD .
So ive purchased GT 120 as GUI card, and my FPS is the same, absolutely 0% boost
Preferences displays me that gt120 is used for gui and gtx470 as GPU
I've benchamrked both GPUs and i got right performances so whats the issue? is that normal?
GT120 goes to slot 2
GTX 470 slot 1
mac pro 4,1 , 16 gb ram, os 10.8.2
Resolve 9.1 Lite
i have last cuda and Quadro drivers installed

The issue is that your bottle neck is the RED media not your graphics card. Set your debayer to lower quality for faster playback.

Hey thank u for response, Red is set to HalfRes quality, i had the same performance with gtx 285, i think its not the encoding quality issue.

[Dwaine Maggart]

Your GTX 470 card should run in realtime on an HD timeline, but for Red footage, you certainly may need to select Quarter Res Good as the Red decode mode to get RT playback. If that solves the problem, then it's just a Red performance issue.

Your GTX 470 card should run in realtime on an HD timeline, but for Red footage, you certainly may need to select Quarter Res Good as the Red decode mode to get RT playback. If that solves the problem, then it's just a Red performance issue.

Thank you sir, ive set decode to quarter Res and i have RT playback thank you,
But what about the quality , i mean do i have the performance what GTX 470 should produce?
And for the rendering should i set Red decode to fullres? or for HD Timeline its not the big issue quality wise? i can see aliasing changing as i change decode mode,
thank you

[Dwaine Maggart]

The graphics card has nothing to do with Red decoding or quality. That's all done in CPU space. Only faster and/or more CPU cores will help with that. Or a Red Rocket card.

On the Deliver page, if you enable the Output options "Force sizing to highest quality" and "Force debayer res to highest quality", your files will be rendered in full quality mode.

Allright then, thank u so much

I though that resolve used GPU for everything, if i install redrocket card it will give me RT Playback on full res?

[Dwaine Maggart]

No, Resolve does not use GPU for everything.

Installing a Red Rocket will get you 4K r3d file 1/2 Res Premium real time playback. Whether it will give you Full Res Premium playback in real time or not depends on your system config. If you have the Rocket in slot 3 or 4, probably not. In slot 2, or an expansion chassis, maybe.

thanx a bunch, one last thing sir,
Ive imported some DPX's 2k and 4k res
timeline is HD
on 2k i get 5-10 fps
on 4k 1-3 fps
is it performance of gtx 470? i want to make sure that machine is working correctly )

thanx !

[Dwaine Maggart]

No, that's a storage performance limitation.

OS and other HDDs have 7200 RPM , so thats the issue?

[Dwaine Maggart]

It's likely your storage speed. Run the BMD Disk Speed Test against the location where you have your DPX files. You need around 350MB/s for 24FPS 2K, more for 4K. Based on your earlier comments, I'm going to guess you have around 100 MB/s performance.

i've got 150 ) so i assume thats the main stucking point in my system!
thank you !

[Dwaine Maggart]

If you build a 4 drive software RAID0 array in your Mac, that should be adequate for 2K playback. For 4K playback, you will need more drives and a hardware RAID controller of some sort.

I have 4 WD velocy raptors , and space in bay so Im goin to create Raid,
results are interesting
thank you again and again !

[Dwaine Maggart]

You'll need a fifth drive for the system drive. That normally goes in the 2nd removable media bay, using an OWC bracket, as noted in the config guide. A 3 drive RAID0 likely won't give you 2K playback rates. Just FYI.

Yes Near the DVD drive bay

Since im the right place, how people manage to put two GTX or other power required cards in mac without external PSU? i understand to extend inputs with Y or molex to sata, but actual PSU can handle double GPU setup?

There's not enough power or space to put 2 x GTX5xx/6xx cards in a standalone MacPro without an expansion chassis. You can only really fit one CUDA card (i.e. GTX5xx or GTX6xx) and one GUI card (i.e. Quadro 4000) inside a MacPro.

In THEORY you can put a single GTX690 inside the MacPro for CUDA using the EXISTING power supply and adapters - lots of people are doing this without issues, but personally, I'd probably power it using an external power supply just to be on the safe side. The MacPro power supply can take the load - but I'm not confident the logic board is up to the challenge over large periods of time. The GTX690 + Quadro 4000 is probably the best setup you can currently get for a MacPro without an expansion chassis.

"On the Deliver page, if you enable the Output options "Force sizing to highest quality" and "Force debayer res to highest quality", your files will be rendered in full quality mode."


Hey I have macpro 2*2.66 Ghz 6 core intel xeon
32 GB 1333 DDR3 and a ATI Radeon HD 5770 with 1024 MB

im trying to render out a HD image coming from 4k red, Not to view it only to render out in any speed that is possible.
I've set "Force sizing to highest quality" and "Force debayer res to highest quality", and im getting an error that my GPU is full and i should try and reduce the number of correctors and my preview goes mad and shows me noise.
From what i understand i dont need a red rocket to render out, and i can debyer full res for output its just going to be very slow.

im on Resolve 9.0.0 and ATM can upgrade having that the new version can be installed on snow leopard.

any chance some one has so helping advice?

Basically - you need a better graphics card. Refer to the Config Guide.

[CaptainHook]

If you build a 4 drive software RAID0 array in your Mac, that should be adequate for 2K playback.

I can confirm that, this image is from my 4x1TB internal software RAID0 (created using Disk Utility) that gets backed up to an external 4TB drive, system drive is run from an SSD: