Hi @svl7. Just a question, using NVIDIA drivers beyond 310.90 limits the core clock on both your and Amal at NotebookReview's versions of this BIOS mod. With yours I can use NVIDIA Inspector to go +200 and get up to 770mhz on core maximum, but for some reason with the latest drivers it will not set on boot at 950mhz, or any other of yours/Amal's frequencies? Do you have any solution to this? Furthermore, there is an R0143C5 BIOS on the 640m LE BIOS thread on NotebookReview, which has a few revisions from your base ROM of R0143C5.