Can I upgrade GTX 670MX to GTX 980M on my P150EM? for FFXIII .

I purchased P150EM about 20 months ago and I recently would like to upgrade my graphic card. I can play FFXIII without any major problem with my current GTX 670MX. But I would like to enjoy better graphic.

I wonder can I upgrade it to GTX 980M or GTX 970M ? or what's the best graphic card I can upgrade with my P150EM?

I have got 180W AC adapter, that should supply enough power.

 

Unfortunately you can't upgrade to anything beyond the 680M at this stage, as the bios does not allow it.

Prema is currently working on a solution to get these cards up and running in the P1*0EM series and there is no ETA at this stage. FFXIII is also just poorly ported and I believe a couple of updates are due to assist with the graphics. Have a look through here see if this helps - Durante Presents: FFXIII resolution unlocking (GeDoSaTo plugin) released - pre-alpha - NeoGAF

 

sadly to heart that...

I have been using GeDoSaTo for few days. I set renderResolution 3840x2160@60 but FPS drops a lot in some scenes, so that why I wanna upgrade my graphic card .

 

4k is heavy on most cards. Just apply aa and af at the native resolution.

 

OK, I will try. Looks like GTX 680MX is the best upgradable graphic card for P150EM.
Does is make obvious improvement if I do so?

 

Technically yes, the 680MX would be the best upgrade, however those cards were exclusive to the Apple iMac's. Even if you were to get hold of one, you would need a compatible vbios to make it work in the P150EM. I would definitely listen to the advice above given by Meaker and qingqinghae, try running GeDoSaTo at native resolution rather than 4k. I'll probably buy the game soon, i can let you know how I go running stock and running GeDeSaTo.

For now, see how you go running those settings on native resolutions, if it's still no good then your only viable choice at this point of time will be the 680M. Anyone with further knowledge on the 680MX please correct me if i'm wrong. But AFAIK, haven't seen anyone in the community run an MX in a P1*0EM.

 

Actually, the game is uber optimized AND coded badly. Basically, it runs (at 60fps at 1080p) on 99% of kepler cards, at their 2D clocks. So when it demands more power, it doesn't clock up and thus stutters like crazy. Running the game at "4k" is actually the way to keep the GPU clocked up that most people attempt to use.

I would suggest dropping the render resolution a bit and going in nVidia's control panel under "manage 3D settings", finding the application, then finding the "power management mode" option and selecting "prefer maximum performance". It should prevent GPU downclocking at all once it detects a 3D application being run. The option looks like this:

 

You could also force the p state through nvidia inspector.