k32 / C7/8 need 198 GB or so RAM for full RAM plotting, so you are just a tad under. 980 will be potentially useless, but there is no reason not to test it. Not sure how much RAM it has, as that could be a bummer. The assumption is that if you are using GPU, you only need a handful of cores, so you may want to depopulate your box to save on power.
The rest really depends what you have on hand, and you didn’t provide any info about what you have.