(UEFI) Dell XPS 15z L511z modded BIOS - and HOWTO

[kasar]

what is your chipset?

as far I know you are trying to "fake it" but I think some chipset have hardware limitations that cant be overriden since the hardware limitations itself

my L502X have a HM67 chipset.

acording to my experiments and those pdf, overclocking my HM67 chipset is posible and have been already done.




aparently most ones ended with a "7" are all extreme.

and it seems extreme is required for BCLK OCing

[Sebashi]

That's exactly what I noticed yesterday .
With HM76 I'm screwed ....

[jkbuha]

hang on... what does that mean - that with HM67 we have the 'premium' version of overclocking potential?

If so, why can we only tweak from the BIOS by 5% BCLK?

[Sebashi]

@ Jkbuha
It is true that allowing 90-800 mhz BCLK range could be calling "extreme" ^^
...but in fact, due to the sandy bridge arch, that now link PEG (PCIe) and DMI to BCLK, overclocking is less flexible on that specific parameter.
Ivy could achieve a slightly better 110 mhz but, it is clearly a decision from Intel to push customer to buy their K serie CPU (or XM for mobile ) and play with coef for CPU and Memory ...

[jkbuha]

thanks sebashi - makes me nostalgic for the good old days of jumper clock setting on the mobo...

given this, surely FSB-based overclocking (such as what I've done with clover) should be the way to go?

[kasar]

another low cost option, would be to get a ES (enginering sample) proccesor instead the expensive extreme/XM ones.
ES are usually even cheaper than the OEM ones , and they usually have unlocked multipliers.

I have in mind replace my cheap i3 with ES i7 when I have some cash ^_^


and well, trying to replicate what JKbuha did with clover (125 FSB OC) would be nice.

too bad clover doest work on windows ):

there must be a way of enable FSB OCing on BIOS, like jkbuha stated, the menus are already there, its just that they need some kind of condition to meet.

its really curius we unlocked all other menus except the most interesting one!

[kizwan]

Hi,

I think I read in this thread some time ago that you can boot on-the-fly using BIOS file in USB flash drive. Can anyone explain how to do that? Thanks.

[kasar]

@kizwan

yeah, we boot bios from the usb stick

to do that, get this tool

http://forums.mydigitallife.info/threads...up-Toolkit

and make a backup of your bios, then rename it to BIOS.cap and place it on the root of a usb stick

poweroff the laptop, unplug the powercord, hold the end key, and plug again the power cord, then relase the end key

the laptop should boot up automatically loading the bios from the usb stick instead the onboard one.

Note: some laptops also load the file from the root of the dvd/cd drive
also building a BIOS.cap image without use the app mentionated before is posible from a bios update.

it is exaplained here like the most of this

http://www.bios-mods.com/blog/unlocked-m...15z-l511z/

[stoffg]

Dear jkbuha and other BIOS Gurus who worked on this mod,

Thanks for the great mod.

Just as an update to all users and readers, this mod is working just keep in mind to spend a little on making a backup before flashing your BIOS.

Started on a XPS 15Z (L511Z) Phoenix SecureCore Tiano
Win8 (64b) i7 2640m

I started from version A11 (actually from A12 but flashed that back to A11, not recommended)
I installed the L511Z_bios_recovery_by_capitankasar.rar tools

Downloaded the modified BIOS version in this thread and unpacked it in the same directory.

ran Winflash and directed it to this package. Program starts reboot and flashing part. However this failed as it detected the package as a older or identical version.
System continues with normal boot, so no damage done.

Second time I tried from the command line after reading jkbuha's comment in this thread, post 11.

Go from command line to the location of Winflash and issue the command

winflash.exe /BIOS /EC /SA /SV /BBL "BIOS1_A12_SPEEDSTEP_UV_FULLMENUS_INTEL.WPH"

winflash reboots and starts flashing process.

Works like a charm


Use the Nvidia Inspector tool to check version.
http://wiki.step-project.com/Guide:NVIDI...__26_Setup

Tx

Stoffg

[jkbuha]

Many thanks Stoffg - good to see the mod working well on a more modern 15z - yours is a 2640m with higher clock speed (mine's a 2720m).

Hopefully we'll be able to soft-unlock BCLK very soon as well, and thus enable overclocking/undervolting!

Happy May Day everyone