[TUTORIAL] [4GHz+] Overclock i7 4XXXm(q/h) to i7 extreme conversion Intel Haswell CPU Microcode bug hackBy tmash
After I saw this result: http://hwbot.org/submission/2830783_0.0_cpu_frequency_core_i7_4700mq_4550_mhz , I got interested to replicate it with a similar method and decided to share my steps to score higher than a desktop 4.4ghz 4770k (according to cinebench ;))
Intel Stock microcode has a Turbo multiplier bin glitch that allows unlimited multiplier increase, I used prema's bios and removed a cpu microcode update to let the cpu run the stock glitched microcode. I will share the bios file, use it at your own responsibility and if you know what you are doing.
1) Download or dump your BIOS, if your bios is ami (my case) then use AFUWINx64
2) Get AMI Aptio UEFI MMTool v184.108.40.206 and UEFITool, HxD (or your fav hex editor)
3) Open your BIOS image with UEFITool, then File>Search, in our case Haswell has the following ID:
, enter C3 06 03 in Hex pattern dialog click OK
4) You can see the last four Hex pattern result, double click the first result and a structure item in the main dialog will be highlighted, right click>Extract as-is to a folder (be sure to be neat and organized or you will mess things up)
5) Do the same with the third result and save it as a diff name other than the first one
6) Now in the folder you have saved the 2 files from step 4&5, open the first one with HxD(any hex editor) and look for
be sure to choose Datatype:Hex-values then hit search
7) Press F3 to find again till you reach this pattern(highlighted):
8) (1) Indicates the microcode version, 17 in this case, we want 00 (cpu stock), (2) the platform ID (the search context we reached at) (3) the microcode length = 5000 (in my case) in reverse (important to know when the microcode ends in order to remove).
9) Adjust the cursor on the beginning of the highlight text/microcode (01) right click>Select Block>Length>5000 or whatever in your case
10) Delete the highlighted blocks (after step 9) then save the file
11) Do the same with the second result from step 3 to 10 then save
12) go back to UEFITool, double click the first result like you did in step 4, right click the highlighted structure in the main dialogue > Replace as-is then choose the FIRST file you edited in HxD
13) Double click the third result and follow step 12 with the SECOND file you edited in HxD
14) You will see "Rebuild" in action row, File>Save image as> P15SM04.PM2 in my case (can be any name as long as your flashing tool recognize it)
15) Open AMI Aptio MMTool > Load Image > your modified rom > CPU Patch Tab and verify there is no 06C3 in CPU ID
16) Be brave and flash your BIOS
Windows Mod to remove auto update microcode on boot:
Click on Start Type CMD in the Search box Right-click on CMD and choose Run as Administrator In the Command Prompt window and change to the directory where the file is located. To do this, use the CD command. You can follow the example below. to change to the Windows\System32 directory you would enter the following command and Press Enter cd \windows\system32
Now use the DEL command to delete the offending file. Type DEL mcupdate_GenuineIntel (and backup) Done!
1) Check CPU MCID:Download AIDA64 , open AIDA64>Motherboard>CPUID and look at IA Brand ID, it should be 00h
2) Download the latest beta Throttlestop (not stable) in my case 810b2
3) Make sure you don't have XTU installed or running (especially at startup) or it will reset any changes in Throttlestop
4) Open throttlestop, click FIVR and look at "[checkbox] Overclock [DIALOG] Max" and note it down
5) Now here is the magic! close FIVR and open it again, [DIALOG] Max value should increase by 2 (up to 80x max ~ 8ghz) everytime you open and close FIVR aslong as long as you increase one of the cores, LOL
6) Increase "Set multiplier" to maximum after your final changes in FVIR (Iv set mine to 42x all cores, so I increased set multiplier to 42 aswell - note voltage ID is messed up ignore it)
7) Increase voltage in FVIR for stability by using cinebench run 3 times instead of prime95, as it stresses FPU which increases heat and tdp instead...
8) Unlock maximum TDP and turbo wattage in TPL, in my case:
9) Done! Changes should be persistent as long as you dont save and exit from BIOS, here is my result in Cinebench with temp throttling (from 4.3 to 3.9 ghz), room temp 25-27 XD: (no.1 at 4.2ghz, no.7 stock latest microcode)
UPDATE: OCed RAM from 1600 to 1866, email@example.comGhz, +200mV adaptive vcore:
I'm also getting 852 with 4.5ghz with this adaptive voltage-like method:
Note: You can maintain maximum turbo multiplier bin with latest microcode after setting it in throttlestop (imp: no crash when testing; make sure its stable) then flash the latest microcode for bug fixes (more stable on my side at x45 with only +230mv, depends on your CPU, i7-4800+ will require less voltage), and you will still be able to set the bin high (up to 80x) as long as you don't crash...
Post your results and I'll copy it here.
I highly recommend lapping heatsink and use liquid metal thermal paste or any decent tp ( I used collaboratory liquid ultra) before doing this -If your cpu throttles no matter what, try decreasing dynamic voltage in FVIR and look at maximum value the package power indicate while stressing, decrease the value by 10% in order to avoid rapid throttling (happens with bad TP) -Do not attempt the OC if you are looking after long service life wear&tear (I expect 2 years from now if I stress the cpu everyday for an hour, which i never do :P)
Happy overclocking, and don't melt your laptop
Thanks to Intel if they leaked this on purpose, kinda futureproofed my machine XD
P150SM 1.03.05 modded bios (at your own risk):
MOD EDIT: link removed, please use a clean BIOS base because of legal implications with Intel :
Hi, I have the prema mod bios (w230st 1.1) installed for a long time, but since 2 weeks ago the hdmi output doesn´t work.
With my normal monitor it works but it doesn´t work with the tv.
When I start the pc with my monitor it works without problems in windows, bios, etc. but with the TV it´s impossible.
I’ve tried everything, a new hdmi cable, other hdmi port in the TV...
It´s says panasonic TV and i can change the 50/60Hz , resolution but no way.
I´ve reinstalled windows 8 and linux.
The only thing I can do is reinstalling the prema bios, can I do that?
It´s not an update, it´s the same bios so I don´t know if y can do that.
Apologies for the wall of text, next time I take this machine apart I will take some photos!
---- WARNING! THIS WILL MOST LIKELY INVALIDATE YOUR WARRANTY WITH DELL ----
---- This is a guide only, no warranties or guarantees are implied, damage is at your own risk ---
---- You will need: T9 TORX screwdriver (to remove CPU only), Decent Thermal Paste, Philips Screwdriver, Thin flatblade screwdriver, Isoproponal electronics cleaner (Meths will probably work too), paper towels, plastic pry tool (or very strong fingers!) ----
If trying to "recover" the BIOS from an overclock, you will also need a non overclockable processor such as the i7-4700MQ or i7-4702MQ. It may work with the i7-4800MQ but I have not tried it.
Turn system upside down, with the back / cooling fans towards you.
Undo the 3 screws on the base.
Carefully lift the plate that covers the front of the system (furthest from you) it is clipped in at the sides
Carefully push the back plate with the fan grilles away from you about 5mm, this unclips it which means it is free to be lifted off.
Remove the 2.5" HDD bay (4 rubber grommeted screws) and SATA connector from the motherboard
Remove the DVD drive plate (4 screws) and SATA connector from the motherboard.
Remove the battery (2 screws) and battery connector.
Carefully remove 5 ribbon connectors. 2 are on the right near the 2.5" bay area, these are vertical. To remove, lift the plastic collar of the motherboard connector with a flat blade screwdriver. pull the ribbon cables up using the attached tab (not the wire) They should lift with no force, if they are still stuck, the collar needs to come up more.
Remove the 3 horizontal cables under the DVD drive. You one need to undo one side of each. Undo the connector closest to the back in this area, then undo the SD card reader at the side closest to the edge, lift the white locking collar to do this and slide the ribbon cable out using the tab. repeat this for the connector underneath, this is the long one and will need gentle prizing (if you use too much force at once, you will break the locking collar).
Remove the SD Card or SD card spacer / blanking plate (IMPORTANT!)
Remove all the screws with a P in a circle next to them. take note of the size information. It tells you the width and length of the screw. This is very important when putting the system back together, it you put a long screw in a short hole it may damage the system or ruin the aesthetics. likewise a short scew in a long hole may not grip enough causing other problems.
The next part will use the pry tools and is not for the feint hearted!
Getting the AW18 apart is a pain, even when all the screws are out there are clips holding the palm rest on these are so tight, most will break when you separate the palm rest from the base of the system. It seems to be easier starting the separation at the point above the power connector and working towards the front. At that point, open the lid / screen as far as it goes, then unclip the back clips around the hinge. Then pull the palmrest away from the other side and these clips will stay intact. Finally lift it from the back and pull towards the screen, this will save the clips to the front of the palmrest.
With the palmrest off you can change the second bank of DIMMS, Wireless card, CPU and graphics card.
To get the CPU out, you will need to undo the lid hinge screws from the top, there are 3 in total. (2 on the left and one on the right). You will also need to remove the plastic guide for the wireless antennae leads. This has one screw on the right side.
Remove the display cable from the motherboard and the logo led cable (use a small flatblade screwdriver to lever the white connector, don't pull the lead).
If you have 2 video cards, you will need to remove the SLI cable. Disconnect the right side first, the cable is only wedged between the heatpipe and hinge, then carefully remove the tape from the CPU heatpipe.
Then lift the lid away from the base slowly, you don't need to disconnect the antennae leads, you just need a small amount of clearance to get the CPU heatsink out.
Undo the CPU heatsink screws, follow the order they show. (before you do this, make sure you have some good thermal paste, something like Arctic Silver 5 or Coolaboratory Pro).
---- FOR BIOS RESET STEP ONLY ---
Install the i7-4700MQ and give it a reasonable thermal connection (you can probably re-use the existing thermal paste). Boot it up with a USB mouse and keyboard plugged in (this way you can keep the palm rest off). There is a power switch soldered onto the motherboard, just in front of the "bottom" DIMM, roughly centered between right and left.
Follow the steps about the BIOS resetting below:
I have to go into BIOS, reset to defaults (F9), save (F10) and then reboot again.
Go into BIOS a second time (F2) and then you can disable overclocking support in the performance option (under advanced)
Replace the CPU with the original that supports overclocking (i7-4930MX or i7-4900MQ for sure, not sure about i7-4800MQ).
This time clean it up with the isoproponal cleaner fluid, make sure all traces of the old thermal paste have been cleaned from the copper heatsink pad and the top of the CPU / capacitors.
Be careful not to break bits off the CPU die (the long grey rectangle) as this is actually the CPU and you will start to remove transistors from it! Its fairly tough, a bit like glass, but can be scratched, crushed or shattered if mis treated.
Make sure you don't get cleaner and paste on the pins or in the socket. pour a small amount onto a paper cloth and use this to wipe the paste away. Don't pour directly onto the CPU, motherboard, socket or heatsink.
Follow heatsink paste manufacturers instructions of how to apply the paste (I have used both Arctic Silver 5 and Coolaboratory Liquid Metal pad, the pad is much easier to apply and seems to have great results! Coollaboratory*Liquid MetalPad - the innovation of cooling for High-End sytems) Be careful not to get these metal based thermal interface pastes onto the capacitors on the CPU.
Fire up the system with the palm rest off to make sure it boots (it may reset a few times or beep continuously on the first boot, this is normal. if you get the beeps, just switch it off and on again, the next time it should eventually boot (may take a minute or so to get through the BIOS screen, or even to get the AW logo).
When you get the opportunity to enter BIOS setup, once again go into the BIOS and make sure overclocking options are switched off. (The BIOS auto detects the CPU and normally the OC options come back on)
---- END OF BIOS OC RESET ----
---- GPU THERMAL PASTE CHANGE ----
If you are feeling super brave you can repeat the process on the GPU too. Personally, I found a 10 Celsius improvement in replacing the stock paste with the coolaboratory pad. The system fans stay off longer while in Windows too.
---- END OF GPU THERMAL PASTE CHANGE ----
---- RECONSTRUCTION ---
Make sure the SLI cable is reconnected.. I have done this in the past after putting it all back together to find it was not re connected, no cable, no SLI!!
Hopefully it worked and booted to Windows (Check SLI is enabled, if the options are non existent then the cable is not reconnected properly (or you have 1 card!)) If no NVDIA options are enabled, the system is probably in Intel GFX mode, press FN + F5 to reboot in NVIDIA GFX mode.
If everything is OK, repeat the teardown in reverse to reconstruct your machine.
When the system is rebuilt but the power button, touchpad, LEDs, backlight or SD card reader don't work, this is because the ribbon cables were not connected back or locked down properly.
Make sure the ribbon cables are square to their sockets (there is a guide line on the cable to indicate the final position) and the locks are clamping the cables.
The next time I need to take the system apart again I will include some photos!