Coachi wrote:... When I make the tuner in another pc I haven`t the problem.
This means, your problem is indeed supposed to be hardware specific, somehow.
For example, if your tuner is getting to much heat from another PCI card, or it's own heat can't be transported away by the case internal air flow, like caused by drive data cables in the way.
Or perhaps you have a partly bad PCI slot, or power supply, or onboard voltage converters, ...
Even possible, you're having thermal RAM or bus timing trouble. Or some basic settings do differ from the other machine and installation, like timeshift buffer set into RAM, with a to big buffer, related to physical memory size, or some swap file trouble, or energy saving related.
However, this is most likely to be a complex issue, with several components and settings interfering with each other...
Not all computer hardware problems would always cause crashes, they could instead as well let a component and driver fail.
At least, there's a high chance, temperature was involved some way.
No other way to find out, than either watching some system parameters by software, or temporarily change components and slots. Or add an extra case blower, to improve the air flow.