Sapphire AMD RX480 musings

m1ke_a wrote on 2/28/2017, 8:10 AM

A while ago I posted this question on card recommendations.

Took the plunge and got a Sapphire Nitro RX 480 8GB and re ran the Red car tests

Old Quadro K2000

Sony AVC 1:38 GPU on, 2:32 off

XDCAM 1:20 on 3:43 off

MC 2:56 on 3:56 off

 

New RX480

Sony AVC 1:15 GPU on, 2:14 off

XDCAM 00:31 on 03:18 off

MC 02:27 on 3:29 off

So that's improvements of 23, 61 and 16%. The Xdcam improvement is excellent 😄, shame the files are double the size....🙁

Are these findings in line with other people's experience?

Unfortunately the major fly in the ointment has been the card's flakeyness with connections. My 2 monitors were Displayported into the Quadro without ANY issues, ever. I spent an hour trying to get the AMD to accept two screens and after four different cables and much swearing, it finally worked with the primary 27" screen DP'd and the secondary 24" DVI'd.

However the minute I go near the screen settings or back of the PC, it has a fit. I'm a little bit loath to delve into the card settings again unless anyone has specific recommendations?

 

Comments

D7K wrote on 2/28/2017, 10:23 AM

I am running a two monitor setting on the same card and have no problems, are you sure you card is seated well?

m1ke_a wrote on 2/28/2017, 11:20 AM

I am running a two monitor setting on the same card and have no problems, are you sure you card is seated well?

Yes, as you're aware, it's a double height card and it's screwed down with 2 backplane screws. 2+ years usage with these monitors and Quadro and no issues at all.

Any thoughts on those render times?

bravof wrote on 2/28/2017, 5:26 PM

Hi m1ke_a

Can you expand on GPU "on/off"? Is there an option in Vegas Pro 14 to turn GPU on? I thought this had been removed and only found in the hidden panel, and it did not make much of a difference.

john_dennis wrote on 2/28/2017, 6:26 PM

Sony AVC 1:04 (mm:ss) GPU Preview On, Render OpenCL

XDCAM 00:22 (mm:ss) GPU Preview On, Render N/A

MC 01:36 (mm:ss) GPU Preview On, Render Open CL 

See my system specs in my profile. I don't have time to fill out the whole table of possibilities.

If your Display Port connectors are mechanically flaky, you should request an RMA from the manufacturer. So far, I've only used DVI and HDMI on my card. It has been solid.

NickHope wrote on 2/28/2017, 7:54 PM
Can you expand on GPU "on/off"? Is there an option in Vegas Pro 14 to turn GPU on? I thought this had been removed and only found in the hidden panel, and it did not make much of a difference.

"GPU acceleration of video processing" (described in section 1 here) is still available. This is what john_dennis means by "GPU Preview".

Legacy GPU rendering (described in section 2 at the same link) is what you're thinking of, and a very different thing. This is what john_dennis means by "Render" and is available only for the Sony and MC AVC encoders, if you have a compatible card. It doesn't make much of a difference other than with very old cards such as GTX 580 or AMD HD 6970, as those were state of the art cards when the code was written for VP11.