ton21

Thank you so much for this! It works! I have a 9510 with a 11800h and bios 1.35 (12/12/2024). I have walked through the whole alternative guide (https://brendangreenley.com/undervolting-2020-dell-laptops-like-the-vostro-7500-and-more-tips-to-improve-thermals-battery-life-and-speed/ - reading out the bios, de-compiling the settings etc.) and in the end, my Dell 9510 with the 11800h and the 1.35 bios could also be unlocked with the procedure above for 9510 old bioses (make a EFI bootup device) by just typing in the following comments (the exact same variabels like the olde bios-es in the description above): "setup_var CpuSetup 0xDF 0x0" "setup_var CpuSetup 0x43 0x0" Throttlestop is running now with -0.8V on the CPU and -0.4V on the cache and GPU (lower temperatures, so less throttling). Also brought the IccMax up to the maximum amount 255.75A, turned on speed shift EPP, Speedstep and C1E. All resulted in 10% faster, lower temps and no throttling, but more important no forced Prochot limiters are kicking in anymore. The bios was putting the CPU into safe mode (only 800Mhz) during MS Teams sessions when it got too hot. And I'm living in Brasil now, so my workspace can get quite hot. I have had -0.9V on the CPU (teams crashed!) and -0.8V on the GPU (got a GPU crash).