I was hopeful that the Leawo Screen Recorder would let you choose the capture codec after checking the screenshots on their product pages. It seems instead that you can only choose the built-in codec(s) with or without GPU assist, if you have a compatible GPU -- it did detect & offer to use my AMD graphics card. There does not appear to be any of the specialized files however that would enable a GPU hardware encoder, e.g., Cuda for Nvidia cards, which indicates that it simply uses the very minimal hardware assist included in ffmpeg. There's also a potential gotcha -- if your GPU is already in use displaying whatever video on screen, will it have the resources available to assist encoding the captured video? There's a lot of variables so all you can do is try. Bearing in mind that using the maximum amount of GPU hardware video encoding, rather than just maybe speeding up encoding with ffmpeg & similar, will reduce video quality, but it can speed up encoding dramatically. That's important... your PC has to write the video file to a hard disk, and if the encoded video band width is too great, writing that file will fall behind and you will not be able to process any more video until it catches up. That means the video has to be heavily compressed at higher frame sizes, e.g., 1080p, to keep the data stream small enough that your PC can handle writing it to disk, but that also means a heavy load on the CPU -- if the load is too great it will fall behind, and again, no more video processing until it catches up. You might be able to find recording software that fully utilizes Intel Quick Sync, Nvidia CUDA, or AMD hardware video encoding, or use the recording option in Nvidia or AMD driver software [not sure about the current Intel drivers]. Or you can use software like Ashampoo's Snap, which can use a faster video codec that works better for capture than ffmpeg [I've used the x264VFW encoder for example], especially if you're limited by the GPU built-into the CPU. Faster SSDs also help.
Leawo Screen Recorder adds folders to Program Files\, ProgramData\, and Users\ [UserName]\ AppData\ Roaming\. It adds a Leawo key to the registry, though it *may* trigger a rewrite of the registry's driver hive.