No lags, No crashes, No Bugs. Not a bit of problems. Yosemite boots up just fine and the resolution is 1920 x 1080 @ 60Hz. It took me over a month to finally come up with this solution that worked. I tried with previous versions of Cuba and Web drivers, but kept checking Nvidia's website and found these new ones and thought I would give it a try. It show the proper video memory also. Like I said I am a Novice and just keep trying things. This is the first time I have had video problems prior to purchasing the Geforce 750ti. After installing 750ti, then even Mavericks no longer would boot up. Video specs listed below. Mine is a Gigabyte 750ti. Hope this helps. Remember these drivers will only work with Yosemite 10.10.2. I made no changes in BIOS.
NVIDIA GeForce GTX 750 Ti:
Chipset Model: NVIDIA GeForce GTX 750 Ti
Type: GPU
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 2047 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x1380
Revision ID: 0x00a2
ROM Revision: VBIOS 82.07.32.40.69
Displays:
ASUS VH242H:
Resolution: 1920 x 1080 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Display Serial Number: A5LMTF179150
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported