Dual vs single GPU for explicit and CFD simulations?

[killawatt]

Hi,

 

I'm looking to upgrade my now ancient quadro k5000 and want to know whether dual gpu's i.e. 2 x p4000's would be more price /  simulation time efficient than 1 x p5000? Can currently pick up 2 p4000's for around £700 so would save a significant chunk if its worth it! and does anybody have information on whether spending slightly more on the new gen RTX Quadro's would be at all worth it? again they can be found for decent money 2nd hand.

 

Currently running 2 x xeon e5-2620's + 120gb RAM in an HP z620 workstation. I use Ansys for simulation with an HPC license. This is purely to shorten solve times, not for graphics in design work or rendering, I'm not so keen to move to Tesla's due to their passive cooling.

 

thanks!