[Wine] Same game slower on faster machine (only one core used)

[argonius]

Hello,

I am having two machines, both running Ubuntu 12.04 64-bit and Wine 1.4.

The older machine is a Core 2 Duo E6600, 4GB RAM, GeForce 7950GT.
The newer machine is a i7 3770K, 16GB RAM, using on-chip Intel HD4000 graphics. When benchmarking the two machines on native linux games, the new machine performs 2..3 times faster in terms of fps depending on the game used.

But I have the following issue when running the preview release of the upcoming Zusi 3 Trainsimulator (http://www.zusi.de/pages/dehaupt/zusi-3/download/demo.php)

Old Machine:
Scenery loads pretty fast - both CPU cores are working during loading and also running the simulation. With default settings the simulation yields at 5fps, with some tuning it gets up to 20fps.

New Machine:
Scenery loading is very, very slow - so far I haven't even been patient enough to wait loading to complete.

I have no clue why it is so slow, the only weird thing that I have noticed is that only one CPU core is active.

I have read the sticky thread about Ubuntu 12.04, it doesn't seem to me that anything there could be related to my problem.

I am pretty new to wine, so any advice what to check / change / try is very welcome.

Thanks
Christian