JadeRover

I don't think so, the 4940xm should beat the 4900mq at all power levels since you can undervolt it more than the 4900mq before your system crashes. If you are power limited for the whole system (which seems very unlikely with a 240w charger), the 4900mq won't perform as well as the 4940xm in any case. Anyway if you ordered the 4900mq, give it a try and see if it can do more than 3.7 since that is your initial goal.

And at what power did they achieve this do you know ? My guess is probably 60w+ to do 4ghz all core on the 4900mq as my 4810mq requires 70w to do all core 4Ghz and it's a tier lower. Your problem is the power limit so I'd stick to the 4940xm

Well that's just a number given by intel for the design TDP of these CPUs so that manufacturers can make heatsinks accordingly. What is important is the voltage per clock ratio that each chip can do. On my zbook 17 g2 with i7-4810mq, when pushing all core to 4.0Ghz it hits 70w. It would be wiser to stay with the 4940xm that has much better silicon meaning you can undervolt more before you crash meaning higher clocks for the same power. All haswell mobile quadcores have the same physical die (some with more cache than others), the way intel names CPUs is that those that can be fed less voltage (=less power) for the same clocks achieved are marketed as the XM chips. For example, this same 4810mq will crash at -20mV at all core 4Ghz. The 4940xm has way better overclocking headroom than the 4900mq. I'm ready to bet that the 4940xm reaches higher clocks than the 4900mq in your power limited system because you can get 3.7 Ghz all core @ -80mv witht eh 4940xm whereas the 4900mq will probably crash at -45mv = stuck at 3.5Ghz all core.

Yes, that is because you are being power/current limited. By undervolting, the CPU can reach higher clocks for the same power/current, you need to investigate all power limiting factors, but in your case it sounds more like current limit as throttlestop shows "EDP other" limit reason

That's a easy fix, solder big wires from the main power rail (19.5v after 2nd Mosfet) to the power pins of the GPU, GPU is fed main power rail through the MXM slot anyway. Even up to 4.3Ghz all core see the comments at the bottom of this page : Intel Core i7-4910MQ Mobile processor - CW8064701474105 / BX80647I74910MQ This is because this is a "900" series CPU, just like 6920HQ and 7920HQ, these have +6 turbo bins VS the +4 on other i7 mobile CPUs But it sounds like you were hitting a hard power limit/current limit so bumping the turbo bins won't do you much good. Power limit editing on my m6700 worked great, can't help you more from what we said in PM with the m6800 as I don't have the machine (nor the m4800 that should have a similar implementation of power/current limit in the bios)

Yes I used the stock UHD display cable : 06GXDN it is the only way to get 4 lanes of eDP displays working = displays with > 1080p and or > 60Hz (without making your own display cable) The display I have is this one : NV173QHM-ny4 BOE NE173QHM-NY4 Overview - Panelook.com I got it as it was a good deal on my local second hand shopping website (40 euros for the display) Display connector side doesn't matter as the UHD cable is made for displays that have a connector on the left side (looking from back of display) and the cable leaves from the left hinge (looking front of the laptop) = You can use "left" or "right" sided display. The display I used has a connector on the right side (looking from back of display) so I had to make the LCD cable loop back on itself inside the laptop lid so as to connect to the display. There is enough room in the "chin" below the display in the back panel to get the cable to loop back without making the LCD bezel bulge. I taped the display bezel back in place and no problems whatsoever since. The only limit is bandwidth as we are limited to a DP 1.3 connection, even in dGPU mode, see here (DP1.3 columm on the right) : My display works as it is 1440p 165Hz 8bit. If you try to use 10 bit 1440p 165hz display you will have to run it at a lower refresh rate to use 10 bits or run in 8 bit mode to get 165Hz. During testing I got 4K 10 bit to work at 60Hz, trying 8 bit 120Hz gave artifacting and flickering image. Hope this helps ! If you have more questions I can try to answer them as well. Regards,

I ran a 4K120Hz IPS display on my 7720 but I couldn't get the 120hz to work, even when selecting 1080p 120Hz, I was stuck at 4K60hz this is because the MUX switch on the laptop limits the bandwidth to eDP/DP 1.3 speed, even in dGPU mode. When I tried to force 120Hz the laptop would show massive artifacts and glitches and it reverted automatically after 15s. However this could be due to the display as it's eDP 1.4 and might have compatibility problems with the system. However I got a 1440p 165hz IPS running at 165Hz as of right now on my 7720, that's to give you an idea of the max bandwidth you can run on these systems. If you are into modding, look for 16 16:10inch OLED displays, specifically this one that is listing really cheap : 2880x1800@120Hz (you'll might at 60Hz) from an HP spectre 16 : Matryca HP HP Envy x360 16-ad WQXGA TS C | eBay The sellers maybe don't sell out of Europe, they usually have good deals on used displays, I got my 4K120hz display from them, a few tiny scratches and one slight spot in the corner but apart from that the display is really nice. Regardless, 16 inch 16:10 can be modded into 15.6 inch laptop, you just need some vertical bezel headroom as the display is around 2 cm taller and it is also 0.3cm narrower. Display in this size and aspect ratio come in OLED variants as well. Finally you can hunt down early vivobook 15s for their display as they have a drop in 15.6 inch FHD OLED display. I don't know about mini-LED displays though.

Did you managed to get CPU overclocking working ? Also memory overclocking should be possible on m6800. Looking at the IFR extract, with setup_var from grub you can change related profiles to enable XMP on you ram modules. You can also write custom XMP profiles to your non XMP ram sticks, up to 2400Mhz DDR3 if you are feeling lucky ! Writing to DDR3 spd is a lot easier than DDR4 spd btw. Here is a link to the guides and tools + proof that someone got 2400Mhz working on i7-4810mq

Yes that's what I understood, to do this you had someone do it ? Because I looked into doing this myself for my zbook 17 g5 but having a good 4K120Hz signal requires some individually shielded cables that are like 0.3mm wide cable + conductive shield. It would be extremely complicated to do by hand. I lack the skill. Unless you solder unshielded cables but then the signal integrity won't be as good. Id' imagine

Hello, probably a bit old now, but how did you route the eDP cable to the display ? I saw that the display you used has it's connector on the right looking from the back, where as zbook 17 g5/g6 4K displays have the cable on the left looking friom the back. Wasn't the original cable too short ? Did you have to make a custom one to extend all the way to the new 4K display connector ? Thanks.

And yes I get your idea, since the motherboard outputs eDP signals (4 lanes of eDP) but it terminates in an unusable connector. The only solution is to DIY / get made a custom cable that connects to the eDP connector on the motherboard and then directly to the eDP display, bypassing the DC board that would create an unusable signal. 4 lanes of eDP is on part with modern laptops, you can connect 4K dislays or 1080p >120Hz displays as well. Worth looking into as the only custom part needed is a custom eDP cable, the LCD can be an off the shelf 40 pin eDP display.

Yes, dell m6600 and dell m6700 DC models have that DC conveter board that transforms the incoming eDP to 50 pin LVDS + 10 pin power cable used by the DC LCD. The HP zbook 17 g1, g2 and 15 g1 that have the DC screen option also use such converter boards. Keep in mind that for all the models stated the converter board looks something like this : So if you get the DC cables for your model you see that it connects to your board in a non standard eDP format = can't use that cable to connect to a standard eDP panel conenctor. Also the zbook 17 g1 and g2 all have this converted board as they all have LVDS displays and the motherboard outputs eDP. Not sure why HP chose this approach, probably because eDP lcds were rare in 2013-2014. so zbook 17 g1/g2 with 900p to 1080p screes have this board if you want a sure way to get your hands on one.

That's odd, so the laptop refuses to boot in your scenario ? But it does in the same scenario + VGA ? You are running dGPU mode or Hybrid graphics ?

That is the correct, Zbook 17 g1 uses a mux switch between dGPU and iGPU that goes to the eDP connector on the motherboard. Then that eDP signal is converted to LVDS and fed to the panel, they probably did this as 17.3 inch eDP panels were rare in 2013, they used off the shelf LVDS ones instead. HOWEVER, iGPU has only 2 lanes of eDP (you can see that on the schematic) and the dGPU has the full 4. When you have a DC screen it needs 4 lanes of eDP, all other stock screens require only 2. So with a stock screen BIOS will give you option for Hybrid graphics enable/disable. When DC screen is plugged in, BIOS sees this and immediately disables hybrid graphic option and forces display through dGPU = no display if you don't have a dGPU installer or the dGPU you installed has no eDP OR it has DP (display port) but wit no backligh control pins = Black screen. HP RTX3000 does have eDP on the correct port, DP_D so this card should work on the zbook 17 g1. I will test this soon as I have HP RTX3000 andzbook 17 g2. Also here is an even cheaper RTX3000 (close to France in Europe) : Nvidia Quadro RTX3000 6 Go GDDR6 N19E-Q1-KD-A1 (HP ZBOOK 17 G6) | eBay 90 euros

Nice !! Looks complicated to get all that wiring down. I was thinking of doing smething similar on my soon to be zbook 17 g1. However I was going to use an arduino connected internally to one of the not in use USB ports for the fingerprint reader. That way I can code a PC to arduino interfacing app that can cantrol the fan speeds internally from the laptop without having to use external switches. This does reqire coding skill tho and I lack some of that.

Uhhh, that not an acual picture right ? We were talking about the pinout of the MXM connector that links up the GPUs display outputs on 4 different channels : A, B, C and D Usually eDP from the GPU is located on channel D called DP_D But for it to work the laptop must wire the eDP port to DP_D of the GPU ! The confusion is that some zbooks : Zbook 15 g1 + g2 + g3 and zbook 17 g3 have it wired to DP_C meaning no output on the internal screen

I will soon get a G1/G2 not sure, blindly bought it for 40 euros, seller had no info at all. On g1 schematic it has eDP on DP_D One day when I have time I while write a complete guide on zbook 15/17 that have MXM slot (g1 -> g6)

Actually the pinout of 8760w motherboard eDP connector is not compatible with zbook eDP Motherboard connector. 8760w has eDP and LVDS on the same connector wheras Zbook had only eDP on the connector. pluggin zbook display cable on 8760w will short out LVDS and cause no boot at best and motherboard damage at worst. Therefore you can only salvage the display from the Zbook 17 g2. You will need to source the DreamColor cables + board made specifically for the 8760w.

The display is the same : LP173WF3-SLB3 also same as the ones ending in SBL1/SBL2/SBL4. They use an eDP cable going to a converter that converts the 40 pin eDP int 50 pin LVDS that then breaks out into 2 cables that plug into the display. Motherboard eDP connector -> (eDP cable) -> eDP to LVDS converter board -> (2x lcd cables) -> LCD 50 + 10 pin LVDS input What is sure to work is get a non working dreamcolor motherboard cable + board + LCD cable from 8760w and use the lcd you salvaged from the zbook.

The issue sounds like thermal constraints since power fluctuates, if it was a steady 100w on the m6700 you would now that you are power limited by the MXM slot. I'm guessing CPU is around 20-40% utilization so that isn't a bottleneck, same for PCIe speeds, both should be at 16x3.0

You can replace it for cheap with a regular cr2032 battery and some tape, see here :

I don't think this is the case here. The laptop turns on and doesn't post unless a certain configuration is used. The laptop fails to detect/work with the video card and doesn't turn on because of that, this isn't a power related problem, more of a vbios / UEFI / Bios setting that comes into play.

When you list DVD, you mean external right ?

I got one stick of 4G 3200Mhz to run at 2933Mhz. I tested it and it is stable, after changing max ram frequency variable to 2933Mhz thanks to SREP_UMAF USB, the laptop refuses to boot once, then it boots okay (happens for each max ram frequency edit I think). Just to be safe, I added +35mv to system agent (integrated memory controller) in throttle stop. From SREP, in pre boot environment, it is also possible to add some voltage to uncore (same as system agent, it will add voltage to the integrated memory controller = more stability). I placed my stick in one of the easy access slots behind the access hatch, unfortunately, as of right now I only have one stick of >2666Mhz DDR4. I will try to make some XMP profiles for my 2666Mhz sticks so they can run at 2933Mhz or so.

Hi guys, I have some free time on my hands and I just wanted to share some of the mods I'm going to do to my precision 7720. I will write a complete guide once I am satisfied on the overall mods. Currently I have a i7-6820HQ motherboard that I will soon replace with a i7-7920HQ motherboard. In the meantime, I have flashed a modified v1.15 bios (enables undervolting) using the dell bios container method here, using version v1.40 as a base : GitHub - vuquangtrong/Dell-PFS-BIOS-Assembler: A script to combine BIOS entries into executable Dell Firmware Update Utilities I also used this smokeless_UMAF beta tool on a USB found here : Smokeless_UMAF/UMAF_BETA.zip at main · DavidS95/Smokeless_UMAF · GitHub to enable some hidden options in the BIOS : we have access to : - CPU overclocking (up to the limits of your cpu, my 6820hq went from 3.2 Ghz all core -> 3.6Ghz all core) - RAM overclocking - RAM SPD writing (= we can write custom XMP profiles to non XMP ram) - Intel ME region flash allowed (= we can flash custom ME region with overclocking BCLK profile) Here is my 6820hq running with a 102.7 ish MHz BCLK, going over this results in an instant crash due to intel limitation = need to investigate : Resulting in a ~100Mhz boost compare to non OC BCLK. 3.600Ghz -> 3.690Ghz More to come !