well the integrated pulls from system ram and the max it can pull is around 1.8gb at 16gb ram and 1gb at 8gb ram i personally have seen hd 4000 pull its own its not pretty but so far ive gotten call of duty ghost to run on my pc i can hit from 8 being the lowest to 66fps being the highest hear are my system specs
Dell inspiron 15r 5521 with full touch display
Processor Intel(R) Core(TM) i7-3537U CPU @ 2.00GHz
Manufacturer Intel
Speed 2.5 GHz
Number of Cores 4
CPU ID BFEBFBFF000306A9
Family 06
Model 3A
Stepping 9
Revision
Video Card Intel(R) HD Graphics 4000
Manufacturer Intel
Chipset Intel(R) HD Graphics 4000
Dedicated Memory 32 MB
Total Memory 1.8 GB
Pixel Shader Version 5.0
Vertex Shader Version 5.0
Hardware T & L Yes
Vendor ID 8086
Device ID 0166
Plug and Play ID VEN_8086&DEV_0166&SUBSYS_05971028&REV_09
Driver Version 10.18.10.3958
Memory 16 GB
Operating System Microsoft Windows 8 (build 9200), 64-bit
Service Pack 0
Size 64 Bit
Edition Basic
Version 6.2.9200
Locale 0409
BIOS A12
Version Dell Inc. A12
Manufacturer Dell Inc.
Date
Display Maximum Resolution 1366 x 768
Sound Device 1 CANZ Stereo
Driver Version 6.3.9600.17397
Sound Device 2 High Definition Audio Device
Driver Version 6.2.9200.16497
Sound Device 3 Realtek High Definition Audio
Driver Version 6.0.1.7023
Sound Device 4 ManyCam Virtual Microphone
Driver Version
DVD TSSTcorp DVD+-RW SU-208CB
CD TSSTcorp DVD+-RW SU-208CB
Drive 1
Size 931.5 GB
Free 447.5 GB
Drive 2
Size 930.9 GB
Free 120.0 GB
Drive 3
SSD Size 110.8 GB
Free 33.3 GB
Browsers
Internet Explorer 11.0.9600.17498
Chrome 0.0
Firefox 35.0 (x86 en-US)
Safari
Software
Java 8.0.250
Flash 16.0.0.257
DirectX 11.2 - forced
.NET 3.5.30729.4926
QuickTime 7.76.80.95
Adobe PDF Reader