Does PrimeGrid require double- or single-precision FP ops?

[VirtualLarry]

Was thinking of possibly picking up a new GeForce 660 card. But of course, DP FP ops got pretty-well axed on the 600-series NV cards. So I'm wondering if it would be worth it over my GTX460 1GB card.

 

[Ken g6]

Depends on the application. The sieves don't require FP at all.

We tested the new NV. In the application tpsieve, NV680@1097 (compute 3.0) is faster than NV570@840 (compute 2.0), by 44% (12.94/9.0M p/s).

But the GFN app requires DP.

it's working for what it's worth.

10min on 680 = 5.62%,
10 min on 580 (10% overclock) = 7%

That said, a 460 is slow these days. (But I still have one.)