RTX 4500 Ada + Quadro Sync II

Gaming and Visualization Technologies General Topics & Other SDKs GPU - Hardware
1

Hello everybody - I’m sorry if this is in the wrong topic, ADMIN please feel free to move this to the necessary thread. I thought this space would work best.

I am currently having some Sync issues with a Quadro Sync II card and an Nvidia RTX 4500 ada generation card. I’m currently sending 4x 4K60P outputs to an Analog Way RS4 switcher.

I sync up the card to the RS4 and I have blinking frames through Pixera. The RS4 is seeing the resolution I’m sending, and all of the monitors are set to the proper resolution. Now, I have had this issue for quite a while on this platform, even with previous RTX a4000 GPU. I did some digging and saw an “RTX PRO Sync card” and was wondering - is this the same exact card as the Quadro Sync II?

I know the RTX drivers and the Nvidia app has changed drastically in the last year, so I’m wondering if I am using the wrong card to sync the 4500? I rolled up all the FW and Nvidia drivers to the latest and still have these issues. I rolled back to Ver 533 and still have the same issues..

I also have an Nvidia RTX a4000 in the same server, but this is used for desktop use only - no rendering or syncing is happening on this card and it is completely left out of the sync chain. Could this also be causing some issues?

The interesting thing is, when I do NOT sync the card(whether it’s an internal sync, or taking house sync from a generator, this blinking issue still persists), and use Pixera, there are NO blinking frames, however my outputs are out of sync. (2 outputs per LED wall - 2x LED walls).

I’m not sending any custom EDID’s, this is all 3840x2160p @ 60FPS. Nothing out of the ordinary here.

My questions are:

Is the RTX Pro Sync the same as the Quadro Sync II ? Is the PRO SYNC a rebrand of the Quadro Sync?

Am I syncing this wrong as the software drivers are all updated? Am I supposed to sync through Mosaic through the Nvidia app and not the Nvidia control panel?

No method of sync is relieving this issue of blinking frames except for leaving the GPU unsynced. Then everything plays back fine.

Any thoughts on this would be helpful, as I’ve been racking my brain around this for the last few weeks. I’ve reached out to Pixera directly and they are curious as well.

I’m on Windows 11 Pro

ASROCK ROMED8-2T

AMD EPYC 7543 CPU

128GB ECC RAM

8TB RAID and 2x 1TB internal NVMe’s.

NVIDIA RTX a4000 (for Desktop use)

NVIDIA RTX 4500 (for LED Display)

NVIDIA Quadro Sync II card - (all drivers and firmware on latest version) (The sync card is hooked up the RTX 4500 only).

Thank you.

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Hi,

I have had the exact same issue with my Pixera setup running through E2. I ended up purchasing another RTX4000 as I run that in my original server. Sure enough it worked just fine.

I wasted days trying different combinations of drivers etc. even running a mosaic would tear. Need to return my RTX4500….

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Quadro Sync II and RTX Pro Sync are exactly the same.

Try downgrading the firmware of RTX Pro Sync/Quadro Sync II to v2.22 and then try again.
Please let us know the results here, to confirm or refute our own related findings with the RTX 4500 Ada.

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Thank you for your reply.

We are using the latest version of Pixera. Is this a firmware version that is compatible with this software?

Thank you.

5

Not sure, we’re not using Pixera.
But we experienced sync not (or almost not) working with RTX4500Ada with QSync FW 3.04 and 3.06. Downgrading to 2.22 (the newest firmware before 3.x) seems to have fixed that.

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We actually switched to a 4500 Blackwell in between then and now. I noticed its ehaving weirdly when trying to use BNC sync. Does it need a true 60p sync, or can it be 59.94i? I want to sync 60hz across all outputs from the BNC connector.

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AFAIK, the BNC sync signal’s frequency just has to match the vertical refresh rate of the configured monitors. In our setup, we are using 30Hz/fps only. But I would expect any in a wide range of frequencies to work, as long as they match to each other.

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Dietmar is right, its not the frequency itself, but the match between screen-requested refreshrate and timingserver signal rate, that needs to exactly/closely match!
With Quadro Sync/RTX PRO Sync, we do NOT force any random refresh rate onto ‘all’ screens! The refresh rates must already match (by 20ppm internal timing, and 50ppm for external timing). Enabling Sync then only manages to compensate for the drift these clocks WILL have over time… (and also ensure all scanout starts with the same pixel(position) at the exact same time… and we offer the SyncAPI, for sw to use and keep the frames in sync on top of scanout being in sync…

regards
-Frank