Hi we bought a nice computer to use to solve optimization problems.

Intel i7-980X@3,33 GHz with 12 GB of Team Group 1600 MHz DDR3 RAM.

When we use Gurobi the computer uses all 12 cores at maximum in the beginning of the solve. However after a while (about 8 hrs) it all cores jump between 65 and 85%

When I solve the same models on an i7 930 all cores are at a near 100% level even after longer solution times.

We first thought that the Hard disk was the bottleneck since Gurobi writes out nodefiles after the memorylimit is used.

However since the new computer have 12 GB of RAM we put the memorylimit to 7 GB so the solver only used the RAM and still with the same performance in the processor.

Any ideas about the bottleneck?

As I said earlier it works at 100% for the first hours or so . Thanks very much for any answers! Our plan was to overclock it but we can't even get it to work at normal speed yet!