When I play any high end game (Assassin's Creed, Borderlands, GTA etc.) they will lag HEAVILY on my laptop. Like, playing it normally. However I am using my laptop as a desktop pretty much (it's a highend laptop and should run every game I named max, cept maybe GTAV) and it's hooked into either my 55inch 4k or my 45inch 1080p flatscreens. Since I have bought the laptop, I don't think I've gamed on the screen once (which is a pitiful 1366x768, the only thing I compromised when getting it).
However today, I was letting my fiancé watch her stupid shows and decided to play the original Assassin's Creed 1 for old times sakes. However, running the game in 1366x768 maxed out results in EXTREMELY chopping lag spikes every few seconds followed by maybe 3 or 4 seconds of smooth gameplay. I exited, tried out Battlefield 4 and with the same results. Exit, same thing with Metro 2033.
Then, I relinquished my TV from my fiancé and returned to HDMI mode 4k with Battlefield 4. 60fps all around along with the other games I mentioned.
I'm pretty computer savy and I can't for the life of me figure out exactly what is causing this. I can't see myself not being able to play on the go, like where would I be without having Morrowind or Skyrim in a hotel on vacation?
If it helps, I have an internal Nvidia Card, no cheap integrates tho I don't see that having anything to do with it. Windows 10 64bit Dual-Core i7 clocked 3.33ghz 16g ram with 4g video ram.
Any help people? Thank you!