GPU Caps Out of Spec?

[itachi]

My friend has this EVGA GTX770 GPU that, after 7 long years of use, is now starting to act up with artifacting and causing random black screens requiring a hard power down.

I decide to check the caps, since I've revived other GPUs by replacing bad ones. Physically they all look fine. These are all very low ESR caps, like aluminmum polymer <=10 mhom and tantalum polymer in the range of 20-30 mohm. They all test fine ESR wise.

They're grouped as follows:
4x 270u 16V Al-polymer
3x 100u 16V? tant-polymer
9x 330u 2.5V tant-polymer
4x 470u 2.5V tant-polymer

The odd thing is, all 9 of the 330u range from about 208u to 247u. They clearly have "330" marked on them in large numbers, but they all seem to average to around 220u. The ESRs all test 20 or 30 mohm. Does anyone know if that's a sign of them failing, or are these actually 220u caps in disguise.