Random FPS SpikesFollow

Anyone else noticing this or is it my machine? I have all the specs to run on high, but it will go from 40fps to 15 fps in cities like every other second, and sometimes happens when lots of enemies or players are loading, here is dxdiag, I have 8 gig ram, i5 processor, and 4 gig graphics on the laptop. Dxdiag wont show my 4 gig card for some reason, just the intergated, but its the GeForce GT 730M 4gig,
thank you for any help

Operating System: Windows 8 64-bit (6.2, Build 9200) (9200.win8_gdr.130410-1505)
Language: English (Regional Setting: English)
System Manufacturer: Acer
System Model: Aspire V3-771
BIOS: V2.22
Processor: Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz (4 CPUs), ~2.6GHz
Memory: 8192MB RAM
Available OS Memory: 8010MB RAM
Page File: 3021MB used, 9596MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.02.9200.16384 64bit Unicod

Display Devices
---------------
Card name: Intel(R) HD Graphics 4000
Manufacturer: Intel Corporation
Chip type: Intel(R) HD Graphics Family
DAC type: Internal
Device Type: Full Device
Device Key: Enum\PCI\VEN_8086&DEV_0166&SUBSYS_06861025&REV_09
Display Memory: 1760 MB
Dedicated Memory: 128 MB
Shared Memory: 1632 MB
Current Mode: 1600 x 900 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: unknown
Monitor Id: AUO159E
Native Mode: 1600 x 900(p) (60.062Hz)
Output Type: Internal

is your laptop running on power-saving mode? if yes change to balanced or high performance.
type "power saving" to get the menu.