Mobile GPUs typically do not show good performance for hash cracking, especially if you're looking at R4 & R5 GPUs. The R5 from that first laptop you linked to would be about 24x slower than a 290X.
Further, consumer laptops do not have the cooling capabilities to handle compute workloads. In these small consumer laptops the GPU and CPU share a common heatpipe and are cooled with the chassis fan. They really can't handle much load or much heat, and regularly cracking on such a laptop will ensure its untimely demise.
IF you're intent on using a laptop for hash cracking, you'd probably want to look at a high-end gaming laptop or desktop replacement notebook that has multiple dedicated GPU fans. Seems like that would be way outside of your budget though based on the laptops you've linked to here.
Personally I just bought a Clevo P650se with a GTX 970M that I intend to use for occasional hash cracking. It has a discrete mobile GPU with a dedicated cooling solution (three heatpipes into two fans). Benchmarks show that it runs 60C under stress tests, so I'm hoping it will run around 70C for hash cracking. Performance should be pretty good for a mobile chipset as well, back-of-napkin math shows it should only be about 40% slower than a 290X.
Further, consumer laptops do not have the cooling capabilities to handle compute workloads. In these small consumer laptops the GPU and CPU share a common heatpipe and are cooled with the chassis fan. They really can't handle much load or much heat, and regularly cracking on such a laptop will ensure its untimely demise.
IF you're intent on using a laptop for hash cracking, you'd probably want to look at a high-end gaming laptop or desktop replacement notebook that has multiple dedicated GPU fans. Seems like that would be way outside of your budget though based on the laptops you've linked to here.
Personally I just bought a Clevo P650se with a GTX 970M that I intend to use for occasional hash cracking. It has a discrete mobile GPU with a dedicated cooling solution (three heatpipes into two fans). Benchmarks show that it runs 60C under stress tests, so I'm hoping it will run around 70C for hash cracking. Performance should be pretty good for a mobile chipset as well, back-of-napkin math shows it should only be about 40% slower than a 290X.