I've got a number of vMix machines and wondered if there's any issue with them that might result in the renderer dropping frames on external outs.

Threadripper 3945WX / 128GB / 3080 (haven't enabled rebar, High performance mode)
GPU Mem <20%, low render times, 85C GPU temp

9800X3D / 5080 / 32GB / X870E ROG (rebar enabled, high performance disabled)
GPU Mem <5%, low render times, <40C GPU temp

5800X3D / 4070S / 32GB / X570 ProArt (rebar enabled, high performance disabled)
GPU Mem <5%, low render times, <40C GPU temp

Nvidia high power, windows graphics high performance, windows power high performance. Up to date drivers (Nvidia, Chipset, BMD)

I've not updated the BIOS on any of these... (The P620 could do with an update so I can enable rebar), the other boards are newer but not sure if that will help.

I have BMD duo cards in these...

25p project
2x inputs @ 25p
replay channels A&B mapped tout 2x outputs @ 25p (just inputs 1&2 delayed 30mins)


Sources don't seem to drop frames but the renderer does.

I haven't referenced the BMD cards... is this likely to prevent dropped frames?

Any suggestions would be GREAT!