QUOTE(e_mc_square @ Apr 12 2015, 06:29 PM)
Actually what happened u facing? I'm using the locked bios all the while because I'm using win8. Win8 need latest bios to make the OSD on Alienware CC working.
I using a Clevo GTX 870m. Is using optimus. Never have a problem.
there was always this problem with fps drop (throttling, even if the temperature is just 73c max) with 880m in my m17x r4, running dedicated gpu mode only. i followed the guide to install unlocked bios (a11), and installed windows in legacy mode.
after reading that optimus mode with uefi might help in my situation, i tried to use slv7's unlocked bios and set it to defaults of stock bios, so that i could use optimus. i booted the os (uefi) with igpu mode, installed intel gpu driver. everything was fine. however shit happened when i installed nvidia drivers (modded 350.05), so that i could run the card when playing games. the os booted, but it showed a black screen. when i moved my mouse, the cursor appeared then disappeared. (it's like loops to draw windows login screen). so, i couldn't run optimus.
here's when the magic happened. after that blank screen i went to bios and messed the video configurations up, and got 8 beeps. i drained the power from the laptop, took out the cmos battery and everything was reset to defaults in the bios. since optimus did not work for me, i went ahead and set it back to dgpu only, with intel gpu disabled, and reformatted the os again in uefi mode. (from the guide that i followed, the os was supposed to installed in legacy mode or else it would show me a blank screen). to my surprise, i could boot with 880m in uefi mode, fastboot on, secureboot on!
as usual, i installed the drivers from dell, and updated windows. finally i installed the modded 350.05.hf geforce driver, rebooted and played games. this was the second surprise: my previous experience was that in legacy mode, when i played games for the first time after fresh install, everything was good. however if i shut the laptop down overnight, booted and played games, there would be intermittent drops of fps. (a few seconds each) it's a common symptom for 880m running dgpu mode according to the guide. i shut it down and went to sleep. this morning when i played games again, expecting the same fps drop. however, nothing happened. the game play was so smooth, and there was no fps drop.
so i turned it off again, took out the battery, and left it alone after the games for few hours. just now i used the laptop to play games again. still, no fps drop.
this is unbelievable. something in that guide might be wrong after all.
to confirm, lemme test it again for a period of time. if this worked, i think i have a m17x r4 running well with 880m and i get back the uefi mode, fastboot and secureboot

edit:
another test. flawless.
This post has been edited by horns: Apr 12 2015, 08:16 PM