Why Amd Apu's are better? 

           Amd releses their Apu series processor in 2011. This Apu(Accelerated Processing unit) Have Gpu Cores which comes in Amd Mid-range graphic cards. Amd is well known for good Cpu's and Also Good Gpu's . Amd decided to give an discrete level graphic card on their Cpu's Hence they decide to release Apu which power of both CPU and Gpu.

          The High price Apu A10 5800k Which is quad core with has Amd Radeon HD 7660D graphics core on single apu which is only sold at price of intel's dual Core i3 3220. The Apu performs slightly better compared to i3 3220 in CPU performance.The Apu performs much more better in terms of gaming due Radeon HD 7660D graphics commpared intel hd graphics.

          The runs all game at high or medium graphics setting at good resolutions ans even scores 4702 which is higher than i3 3220. The intel i3 3220 scores only 4246 and runs some games at low or medium graphics setting and lower resolution still the game stuck and run at lower.

 their are many good things using Apu instead processor with intel hd graphics-

• APU cost less upto the intel i3 3000series processor.                                                                                 
• The Future Apu's release on 8000 series Gpu cores.                                                                             
• The new relesing Apu's supported on older Fm2 socket motherboard.                                                                                      
• The Fm2 socket motherboard supports crossfire upto 2 graphic cards even with cheaper  motherboard.                                                
• The Apu supports crossfire connction with discrete graphic card (refer supprted graphic card pairing on amd's official website).                                                                                          
• The Fm2 motherboard future high clock memory supports upto 2400(O.C.)/2250(O.C.)/2200(O.C.)/2133(O.C.)/2000(O.C.)/1866/1600/1333/1066 MHz                                                                 
• The Fm2 motherbard with two Ram slot can give Upto 32GB ram supports i.e, with four slot motherboard you get upto 64GB of Ram memory.                                                                     
• The Apu's supports high memory clock speed Upto1866mhz(Even higher than 1866MHZ but it is unofficial by amd) Whether intel i5 3570k even intel i7 3770k supports upto 1600mhz even with higher price than A10 5800k.                                                       
•  Amd Apu Gives Direct3D support , Direct3D 11(Direct X11),OpenCL support  1.1,  OpenGL support  4.0 .                                               

• And lastly Amd system build costs less in  terms of money. Uses less power than intel System. Apu's are better for overclocking even on stock cooler.

See all Apu's detail on amd's official side-
http://www.amd.com/us/products/desktop/processors/a-series/Pages/a-series-model-number-comparison.aspx