Since version 5.2 (May 1999), the PC GAMESS (now Firefly) had included closed-shell MP4(full) (a.k.a. MP4(SDTQ) or MP4-SDTQ) module, which we believe, was a kind of the real state of the art. ... Table I. Standard MP4(SDTQ) benchmark, time/performance data for the most expensive N 7 MP4(T) step (43.057 10 12 Double Precision Floating Point operations using DGEMM, size of matrices: 217x193). ... 561.00 seconds (76.75 GFlop/s) using all available CPU cores for computations and no GPUs at all . ...