Upgrading Dell T5500 for best results

I'm running Davinci Resolve 12.5 on the following system...

PC
Dell Precision T5500

Operating System
Windows 10 Professional, 64 bit

Processor (CPU)
Intel Xeon X5650 @ 2.67GHz and 2.66GHz (2 processors)

Main Memory (RAM)
48 GB

DirectX
11

Sound Card
M-Audio Delta 1010LT

Graphics Card
NVIDIA Quadro 4000

It runs fine, but I'm wondering can I upgrade the PC hardware and Davinci Resolve software version to get better functionality/speed/results?

Though my system is old (and I currently only edit 1080p. I haven't yet gone into 4K territory), I'd appreciate any input to upgrade rather than buy a whole new system.

Thanks in advance,

Seamus

You haven't stated what Quadro card it is but given the rest of the specs I'm assuming it's the very old one with only 2GB of VRAM.

The entire system is pretty outdated, a (higher end)consumer pc could probably easily outrun this system.
However I think most of the calculations in Resolve are GPU based so upgrading that will massively improve your performance. The question is is t really worth it for what the system can do and do you actually need it for the work you do.
What is the material you work with? What type of workloads are in your projects? Soley colorgrading? or also editing with lots of effects etc.

The next question is what are you able / willing to spend and what type of performance are you expecting.
You can't do 4K with only 2GB of VRAM but buying an expensive superfast GPU might be a waste if the rest of the system isn't upgrading along with it.

The card is an NVIDIA Quadro 4000.

I've read that, in OpenCL mode, it can run DR 14, though perhaps a little slowly?

My work is not so effect-intensive, however I know when more things are possible one tends to expand one's creativity.

Maybe you're right - it might be better to go for a brand new machine!

Seamus