Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Is there a difference between AAC-X4S and X-4 the X-4S says Gaming computer
Document: I can't speak at all about the machine's gaming performance, as I don't play any computer games (unless you count old school console emulators, which don't demand much and run like a breeze on this machine).Finally, I must echo what has been said about the tech support that AA provides -- unbelievably courteous, responsive, and helpful.
UPDATE 4/13/2014. I can report that, after around six weeks of heavy use, the strange crashes that Aaron helped diagnose when I first started up the PC have never returned. Whatever the problem was, it was probably an artifact of the Windows updater conflicts that Aaron straightened out. This computer is a workhorse!
This thing rocks! I had been researching computers for 6-8 weeks after my house was struck by lightening & fried my computer which was by the way plugged into a Monster protector (didn't fry the printers though) I knew what I did & did not want as far as programs, etc. I didn't want windows 8. It was hard to find machines without it. I was drawn more & more to gaming PC's & almost bought one from another brand & then stumbled on this.
Also, I signed up to get Windows 8 when it comes out for only $14.99. This is mentioned on other sites but not on Amazon. It is available to everyone who buys a computer preloaded with Windows 7, regardless of where you purchase the computer. The computer was exactly what I have wanted for several years. The 3.6GHz processor has better reviews than the newer 4.2GHz. It overclocks to better than 4.2GHz if needed.
Upon opening the box, the 4 corners only have styrofoam to keep in place, which had gotten broken. Also the Windows software case in the bubble wrap envelope inside was cracked (which probably took the brunt of the damage).I left packaging feedback, and let Aaron know this when I registered the computer. He said to send a picture, so he could help me with the door issue (but I don't have a camera right now).
Aaron immediately ordered some new memory which I received a week later and the problem has been resolved since...about 3 or 4 weeks now. *I just want to note that Aaron's response time to emails is usually immediate during business hours and during non business hours, I have seen immediate responses as well. Very professional and helpful, with any issue.I have had one issue with the computer since the memory issue, and this is more of a warning to all who purchase the system.
On reboot, I had to choose the CD/DVD drive (hit F12 to get into the boot menu). From there on, the installation went without a hitch.The big surprise came after rebooting. The computer is screaming fast. Firefox loads with all extensions in 4 seconds. LibreOffice Write in 7. YouTube videos in full HD are perfectly smooth, and playing Steam games gives me a whole new world of graphics detail.Kudos to the hardware and the software.
Altogether I have thousands of files, mostly pictures, they took up only a very small corner of the large hard drive. I have only used this for a couple of days but it is fast and quite. It may not handle the heavy gaming but I have run two sims ( one being a flight simulator ) and have had no problems, the refresh rate is excellent, high FPS and no screen flutter.
That's the end assessment. My recommendation:  This system is nearing its end in terms of cutting edge. It's a solid machine as of the aforementioned date, but it's getting a bit dated as of 12/4/12. Having said that, their customer service tried to help me and I should have listened. My recommendation:  Buy from this company, but research their latest offering.
Being a die hard Windows XP Pro user and having my computer for almost ten years, the poor thing has been dying no matter what I upgraded and did to it. Was time to get a new one. There is so much out there and it was a hard decision until I found AA Computers on Amazon and my new AAC-X4.
Answer: The AAC-X4 is designed for office and home use with power to edit and manipulate videos and large Excel macros. It has very limited gaming functionality. The AAC-X4S is designed to do all of the above plus mid level gaming.