I wonder if it is feasible to replace the SMT chip capacitors on the graphics card with solid electrolytic capacitors (all Sanyo's)?

Absolutely; Both are electrolytic capacitors, and you only need one parameter of two parts;

Because I can't see the parameter of the part you want to change, beside it;

Its parameters are: same capacity (47pf), same withstand voltage (6V);

Go to the market and buy a 1 yuan! It may be a little different in size,

Finally, I suggest you find a way to add a heat sink to the hot part! Otherwise, the life of your parts will be short!