followed Lost_N_BIOS instructions (Dell Optiplex 3020 BIOS flashing (3))

got the 2 files

http://s000.tinyupload.com/index.php?fil...371798386728620

anyone can help add nvme boot ssd support and if possible overclocking option

thanks.

@nofearek9 - Do you see "Performance" section of BIOS already? If yes, nothing more to enable, and if you can't see that this is the only settings in there Multi Core Support, Intel SpeedStep, Limit CPUID, Intel TurboBoost, HyperThread control
Here is NVME mod BIOS, you will need to follow all steps in section #4 "Installation to the SSD" once BIOS flashed - [Guide] How to get full NVMe support for all Systems with an AMI UEFI BIOS
http://s000.tinyupload.com/index.php?fil...464827551564738

Flash via FPT (FPTw.exe -bios -f -NVMEbiosreg.bin), jumper does not need on since we are not flashing ME region, however see my last comment

Since your BIOS/SMI lock is enabled you will get FPT error 368, so you'll need to follow my guide before you can FPT flash (Start at step 6) - [GUIDE] Grub Fix Intel FPT Error 368 - BIOS Lock Asus/Other Mod BIOS Flash
Here are your variables you need to unlock >>
SMI Lock = 0x3F
BIOS Lock = 0x40

So at grub you will type following
Setup_var 0x3F 0x0
Setup_var 0x40 0x0

To get to grub, since your BIOS does not have an exit to EFI Shell option, you will need to use the following method I outlined for user here
Alt boot to grub when no boot to EFI on exit page - [Help needed] Hidden Advanced menu Bios HP Z1 J52_0274.BIN (2)

Or, you may be able to avoid all that dance and FPT without error with the jumper on, but I am not certain and think that maybe only allows ME read/write access, but worth a try first I suppose

yes i can see the Performance section,thank you very much,i will try the steps.

@nofearek9 - that's all there is really that's performance related, sorry no overclocking.