One of them, VoltageStorm 2.0, claims a threefold speedup for static and dynamic full-chip analyses of IC power grids.
Thunder is fast, Spice-like simulation, and Lightning is matrix solver technology.
The major technology change in the 2.0 releases is a speedup to the Lightning matrix solver technology thanks to algorithmic improvements. The primary impact is felt in VoltageStorm, which claims a threefold speedup in both static and dynamic analysis. Accuracy, said Fujimura, is still within 5 percent of Spice. Before signal routing, VoltageStorm can analyze IR drop while after signal routing it can analyze power-grid signoff. No other extraction product is currently supported.