I've got a Sager NP6110 with the exact same specs, but on WIndows 7 x64, and I ran COD: Ghosts on high settings very smoothly, through HDMI to a 42" LG LED, with only a few hiccups along the way:
1. There were some white, square artifacts on one of the later levels.
2. Also on one of the later levels where there are a lot of streams/waterfalls, some of the water textures were very bright and I'd thought "is someone using the strobe light from one of the previous levels?"
Other than that, it ran just fine. Surprisingly fine. I should mention, however, that I've recently re-seated both the CPU and GPU with Antec 7 diamond compound and am running the laptop on top of a cooling-fan pad, but those aren't exactly "extreme" mods or anything.
Make sure you've updated all of your drivers and close out all un-needed processes and you should have no problems.
I should also mention that, somehow, I'm able to play Battlefield 4 on the highest settings. Swear to god. And it doesn't even flinch! How that's possible, I do not know.
Oh, totally also forgot to add: I'm using a little utility that was suggested to me for running games. A CPU "unparking" utility:
"If you are an owner of a new multicore Intel CPU for example Intel core I7 and Windows 7 or Windows Server 2008 OS, you already might notice that some of the cores in your resource monitor are marked as parked. This is a new feature of windows 7/2008 operating system that is made to balance energy consumption by your CPU. So let’s say if you are performing some tasks that do not consume a lot of CPU power, all the cores that are parked will remain in that state. However, if you are running something that requires a lot of CPU power, all the cores, which were previously parked, will be placed in the active state (unparked) to perform the task. And after it’s done, they will be parked again.
All in all, this is a nice feature to save the energy. But if you decide to keep all of your cores active at all times, there is no way to disable CPU parking from the user interface or by running command prompt."
The link to the utility is here:
http://www.coderbag.com/Programming-C/Disable-CPU-Core-Parking-Utility