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If you need it I can put together a C program, I think at least 100k key/s are possible, then 2^30 points in less than 3 hours; what speed do you think you need? How much DPs you want to check per hour?
At picture 1 2080ti produce 2200DPs every 2seconds. the same 2^30.5(Nop) / 20^20(Dpsize)=2^10.5 DP/s = 1176
If there will be for example 100 GPU 2080ti it is 110K DP/s need to be verified.