[Opensim-users] Nvidia GTX versus Quadro - Reasons for lower FPS on Quadro

[Ai Austin]

I hope no one minds me raising this here... but 
it may be a useful forum since we have 
experienced and knowledgeable developers and 
hardware designers on this discussion forum...

I know the LL Viewers and hence most of the 
others viewers say that the Nvidia cards that 
"report as Quadro" don't have the same support or 
testing as the consumer GTX cards.  But what is 
it about these cards or their drivers that is not running well.

On looking at the stats bar, the only differences 
I can see relates to KTris per Frame and KTris 
per Sec... which are significantly lower on the 
Quadro K4000 compared to a GTX 580 and GTX 680.

I have been monitoring my fps rates a bit more 
closely than usual recently and I think I see 
significantly higher frame rates on a much less 
powerful older Nvidia GTX 580 I have on one rig 
(with only 8GB of memory and rotating disks) 
compared to the system I thought would give best 
performance with an Nvidia Kepler-based K4000, 
32GB memory and SSD drives on which I seem to 
only be getting about half the frame rate. I 
tried to set these up with seemingly identical 
tests with 1920×1080 display, identical ultra 
video, same view distance, shadows, 
anti-aliasing, same cache size and network 
bandwidth, and everything, and I had my avatar at 
same time of day facing the same direction on an otherwise unoccupied region.

I wonder if anyone knows if there is some 
specific issue between using the apparently 
better fps delivering consumer level Nvidia GTX 
GPUs and seemingly more powerful but less well 
performing Nvidia Quadro Kepler GPUs that may be a root cause?