Laptop not fast enough to play games? Possible to upgrade?

I have the most recent Lenovo Yoga, and a Pavilion dv6. I bought a couple of games on the Steam sale, but neither of these laptops are good enough to run games like Dragon Age, Far Cry 3, or Witcher 2. Is it possible to upgrade my laptops?

Thanks

Added (1). The Lenovo Yoga (which is presumable faster) Specs are:

Processor: Intel(R) Core(TM) i5-4200 CPU @ 1.60 GHz 2.30 GHz
RAM: 4.00 GB
System Type: 64-bit operation system, x64-based processor

We would need your actual laptop specs.

and usually you can't upgrade laptops, you have to buy a new one

No, it is generally not possible to upgrade laptops. Attempts to do so will void your warranty, and likely will not work. There are rare cases when you find a part that is both compatible with your setup and will fit inside your laptop comfortably, but it's never a for-sure thing, and without some technical know-how you're more likely to damage/break your laptop than improve it.

No but you can upgrade the ram and hard drive