Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: What is the exact graphics chipset (example: HD 2500, HD 3000, etc.)?
Document: Go for an i3 or i5 if you want more graphics power for a true home theater setup, but for basic business computing that handles HD streaming you can't beat the economics of this little box. Again, for $151? That's a  bargain with very little compromise, if any, in performance.
I added a wireless card so could position this with my main TV set.These NUC units use USB ports for almost everything, so you may want a powered USB hub  if you have a lot of peripherals.The internal graphics are great.
A plus with this is it can support reception and recording of premium content (HBO, Starz, etc...) as well. By "can" support I mean that the HDHomeRun supports it when the receiver is DTCP-IP (copy protection) capable. So in the case of Windows media center playback and recording of premium content is supported.
I have used several of these for various purposes. They are great!I've used them for Windows 7 and 8 PC's for family members who wanted cheap computers. With the solid state drive, they are surprisingly fast. They boot to windows in a matter of seconds, not minutes.I've also used them as cheap Asterisk pbx phone systems for voiSip. They can easily handle 20+ simultaneous calls. The installation had no trouble finding the network card, etc.
I was a bit worried about buying an Intel Nuc without an i3 cpu but decided to go with a celeron cpu since it was much more affordable. I am happy to say the unit has more than enough power to be used as a HTPC running openelec. Note, it does not come with ram, flash drive, and wireless card. They can all be purchased serparely. This intel NUC can run videos coded in H.264, mp4 format, avi format, mpeg, etc.
I first installed windows 7, downloaded the latest intel bios and windows driver and installed them. My first hiccup came when I ran WMC cable advisor. It reported that I don't have an adequate video card and wmc cannot be used to watch cable tv. After some fruitless googling I thought I'd take a look at the Windows experience index. It was reporting my graphic card at 3.1. I reran the test and the graphics were up to 4.9.
So for about $220 I have a great little HTCP as OpenElec runs right off the 16GB USB stick and I have a 2TB external HD connected via one of the available USB ports where I keep all my media.
I also realized that I already had an identical stick of RAM so I installed both (4GB total) but it doesn't really have any advantage since the system reports >3GB of RAM available during HD streaming (and this is with the GPU assigned MAX MEMORY in BIOS).
If I have the NUC decode the HD Audio and out multi-channel LPCM it can occasionally rise to 18%. I was worried about not getting the i3 NUC due to the faster processor (and faster GPU) but even the add-on Aeon Nox skin for XBMC runs very smoothly.
I installed 2 Gb of ram that I had  from an old laptop, a 24Gb MSATA. Linux (mint is my flavor!) and screwed to my TV. I connected to Lan and a USB external HD with media files on it. Messed about a bit to get samba share working.
Answer: I've seen a few say it's actually HD 4000: http://www.cartft.com/catalog/il/1662Newegg also lists it as HD 4000: http://www.newegg.com/Product/Product.aspx?Item=N82E16856102004