You won't get good performance out of an Intel graphics card...
It's not even a graphics card, it's a graphics accelerator. Basically, instead of having RAM dedicated for graphics like you would a graphics card, it runs off of the system RAM. So that 4 GB's of ram he has, has to do more than normal.
Your web browser takes 100-200mb of that RAM, windows takes over 1gb, other programs like virus protection, add up to a few more hundred mb, and it leaves you with 2gb supposedly.
What I have found though, is that to get it running smoothly, with minimum FPS drops, and page faults is you have to set iracing to use only 256mb of RAM for graphics, and 1300mb for processing. Obviously graphics are set to class 1.
As you can imagine, it's not very pretty, but in 1080p it actually looks pretty good, but depending on the track, only runs around 35/40 FPS. On some tracks it'll run 55FPS, but some only 30 FPS.
I want to buy a graphics card, but I don't know how to install it, I have a laptop so it's a pain. Plus it's under warranty, and I don't want to void it.
Basically though, you can still run iracing even on a computer like this.
If iracing didn't need to use an internet browser to work, it would improve things immensely but oh well.
Netkar actually runs fine and looks great on my computer, and LFS looks and runs even better.