[GUIDE] Dell Precision M6800/M4800 sBIOS mod

I found some docs from dell, and I found that I already Enable the Signed Firmware Update feature , how can I disable the Signed Firmware Update feature , or Refrash the bios not brick the notebook, I really need your help. Very thinks.

 

Hello:
Have you reflash the bios with signed firmware update enabled, or have you find a way to disable the signed firmware update ?

 

With this mod is possible to get full 57w on core tdp? Anyone have achive that? (M6800)

I have a 4940mx on my m6800 can get no more than 37w

 

My 4710MQ was stuck on same wattage for a few months. In my case it was due to wrong battery. When i was messing with friends M4700 i swapped our batteries. Once i plugged in original pbattery back all was fine and CPU went back to 47w long turbo.

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Hello, I have modified the vars, and checked the values after reboot, the values already be set to 0x01, but i still can't see he current and turbo boost power time modify items in Advanced Tuning Tab, the Core Voltage Offset adjust item also gray, what have you done to make the modify work? Thanks a lot.

 

I have same problem, anybody solved it? Just Batter? I removed the battery from notebook, it still can't full speed run.

 

Removing the battery did not help in my case - plugging in proper battery worked magic. After plugging in proper battery it worked as it should even after removing battery.

 

Yesterday, I install the A16 BIOS, and set vars again, it is no working. My cpu is i7 4910mq. After that, I installed a CPU microcode driver from VMWARE and intel, the cpu microcode is 20170707 edition。

Today I installed new firmware for the finger scaner, all the changed vars be invalid. In xtu, I can't set cpu core speed, but when I run xtu cpu stress test, the cpu can run at 3.6G, power is 47-54W, I havn't change the battery. But when I put the notebook on the docker, run the xtu cpu test, the power still can't over 37W, and I can't run the CPU with 47W any more, even if I install the new bios A23, every thing same. Maybe I should install the BIOS A16 ， then install the cpu microcode driver again.
CPU microcode driver is here :https://labs.vmware.com/flings/vmware-cpu-microcode-update-driver#instructions

 

Now my computer run with full speed again, I just install the new bios A23 with new cpu microcode reboot the system. In XTU, I run the cpu stress test, at beginning , the cpu can run at 54W, after 28secs, cpu be limit to 47w with current limit, speed is 3.3GHz. Tomorrow, I will set the vars again to unlock the overclock and power.

 

Dear friend, can you share your A23 version full bios dump?

I am unable update further from A16, wanna try reflash..