How to check CUDA Compute Capability

You should just use your compute capability from the page you linked to. For example, if your compute capability is 6.1 us sm_61 and compute_61.

SM stands for "streaming multiprocessor". The arguments are set in this confusing looking way because they are used as arguments for nvcc where the compute_XX sets the architecture for a virtual (intermediate) code representation and sm_XX sets the architecture for the real representation. Unless you have a good reason, you should set both of these to the same thing.

4 things to check:

• The bios revision you are on supports your CPU. I can see that support for the 2500k was added in bios version 0507 for that board. If you are not on the latest bios, reinstall your old processor and update that first. https://www.asus.com/us/Motherboards/H61MC/HelpDesk_CPU/
• The CPU is properly seated. There are no bent pins in your motherboard and the CPU is oriented correctly.
• Your cooler is mounted properly and is applying sufficient and even pressure to the CPU. I have seen many builds fail to POST because the CPU cooler is too loose or is tightened unevenly
• Your old CPU works properly in the system (to rule out issues with your GPU or the rest of your setup)

In terms of debugging, I would encourage you to see if you have the bios speaker that came with your mobo or if you can borrow one from another system. This speaker will give you beep codes you can look up online (made up example: 4 beeps means memory not supported). Also, if your motherboard has an onboard video output, try removing your GPU and connecting a monitor to that video output. You can also try booting with only one stick of ram just to eliminate variables.