How to increase speed of Wpa2 cracking using pyrit in kali linux with AMD E-450 with Radeon HD 6320

I have a Dell M5040 notebook which comes with

AMD Dual-Core E-450 64-bit Processor(1.65 GHz) with AMD Radeon HD 6320 Graphics

4 GB RAM 500 GB HDD

I am using it for cracking my home wifi network with Kali Linux using pyrit

Network details

ESSID = D-Link Password Length = 8

I have captured wpa handshake and I want to crack it.

I want to increase speed of cracking using CPU+GPU or AMD HD Radeon 6320 which comes with my processor

How can I do this?

Please help.

Sorry for bad english