I am considering putting a RTX 3050 inside my oldish workstation. I plan to use it for CUDA rendering in Blender, so I am not afraid that the CPU (E5-1650 v1) would bottleneck too much.
What I am worried about is power. I have a 635W PSU that has two 6-pin connectors from the VGA2 slot. (the VGA2 is actually a single 8-pin but female - cant find matching cables). The card has a single 8-pin input.
So I am thinking if the best solution is a 2x6-pin to 8-pin converter (should be able to find those).
The card itself is 130TDP (similar to the CPU).
Also found one that is only 110mm wide, so should fit the case.
Your power supply should be plenty enough power for the RTX 3050 as the 2x 6-pin cable alone can provide 150w. While there is a 10-pin to 8-pin cable DP/N 03H4HG for your workstation, it's a hard to find item, so a 2x6 to 8 adapter should work for you.
In case anybody else would wonder - it works with no problems. Only my card has the power connector at the exact spot where the internal handle is
2x6-pin to 8-pin works fine.