Developer79 Posted August 29 Share Posted August 29 Hi, here an Test with P870TM and RTX4070MXM: 1 Link to comment Share on other sites More sharing options...
SuperMG Posted August 29 Author Share Posted August 29 1 hour ago, Developer79 said: Hi, here an Test with P870TM and RTX4070MXM: Hello! What's the max TDP you got? You were thermal throttling? Didn't you use a 1mm shim on the die? Link to comment Share on other sites More sharing options...
SuperMG Posted August 29 Author Share Posted August 29 Thanks to @Developer79for confirming my hypothesis on the backlight pins. Yes the pin 23, 25, 27 were indeed needed! Sadly Developer79 didn't find a way to do some hardware mods on the PCB of the RTX 4070 MXM. He did it on his MXM connector, which doesn't make the MXM card plug and play on almost any mxm laptops. Although... I'll try my best to solder these 3 pins. The red line is 2 wires. (280 to 23, 25) The green line is 1 wire (278 to 27) If I can't solder these... I need to contact someone else to solder these pins! Wish me luck once I get the 4070 MXM back home! 2 Link to comment Share on other sites More sharing options...
SuperMG Posted September 1 Author Share Posted September 1 Hello. Here's a new clear picture. It shows how to do the mod. It's the right one. I checked the datasheet for the RTX 3060/3070/3080 (from X-VSION, probably the same for ZRT). They also lack the backlight pins 23,25,27 and the vbios don't have eDP. Although, they have DP on DP_D. Theorically, if the backlight pins are modded like on the picture I've sent, the DP could be displayed in the eDP screen! I know you 4 guys have the RTX 3060 or 3080 from X-Vsion. If you have an eDP laptop that has signals for DP_D between pins 206 and 236 of the MXM slot, you can try this mod and let us know please! @sliderfra @therhor70 @aldarxt @ssj92 Link to comment Share on other sites More sharing options...
Developer79 Posted September 2 Share Posted September 2 On 8/29/2025 at 2:20 PM, SuperMG said: Thanks to @Developer79for confirming my hypothesis on the backlight pins. Yes the pin 23, 25, 27 were indeed needed! Sadly Developer79 didn't find a way to do some hardware mods on the PCB of the RTX 4070 MXM. He did it on his MXM connector, which doesn't make the MXM card plug and play on almost any mxm laptops. Although... I'll try my best to solder these 3 pins. The red line is 2 wires. (280 to 23, 25) The green line is 1 wire (278 to 27) If I can't solder these... I need to contact someone else to solder these pins! Wish me luck once I get the 4070 MXM back home! 17 hours ago, SuperMG said: Hello. Here's a new clear picture. It shows how to do the mod. It's the right one. I checked the datasheet for the RTX 3060/3070/3080 (from X-VSION, probably the same for ZRT). They also lack the backlight pins 23,25,27 and the vbios don't have eDP. Although, they have DP on DP_D. Theorically, if the backlight pins are modded like on the picture I've sent, the DP could be displayed in the eDP screen! I know you 4 guys have the RTX 3060 or 3080 from X-Vsion. If you have an eDP laptop that has signals for DP_D between pins 206 and 236 of the MXM slot, you can try this mod and let us know please! @sliderfra @therhor70 @aldarxt @ssj92 Each motherboard must be examined individually and then modified accordingly. Not all displays function in the same way. However, those from Clevo usually do! Link to comment Share on other sites More sharing options...
SuperMG Posted September 2 Author Share Posted September 2 17 minutes ago, Developer79 said: Each motherboard must be examined individually and then modified accordingly. Not all displays function in the same way. However, those from Clevo usually do! I compared some Clevo P7XX and P870 they do indeed have the same pinouts! Same for the Alienware M17X R4 (it has a mux switch for the eDP connector unlike Clevo) The backlight pins are universal. I can't confirm if other laptops are compatible with that. Some may have different signals for eDP like not being set for port D... Better find the MXM pinouts diagram for your laptop! Link to comment Share on other sites More sharing options...
SuperMG Posted September 2 Author Share Posted September 2 @Developer79 Solder-less idea, using thin flex cables and one wire. (Sorry for the bad example) Link to comment Share on other sites More sharing options...
sliderfra Posted September 3 Share Posted September 3 12 hours ago, SuperMG said: @Developer79 Solder-less idea, using thin flex cables and one wire. (Sorry for the bad example) As both 278/280 pins are 3.3v & the 3 others are BL pins (that need 3.3V), you may solder blob the 278+280 & 23/25/27 then solder a single wire between them. I think that the easiest solution. One might even put a switch if mod is not needed to revert to standard specs. EDIT: you need to check schematics as MXM pinout on laptop might not be exactly the same. If you solder 3.3V on GND pin you end up with a dead short Link to comment Share on other sites More sharing options...
Developer79 Posted September 3 Share Posted September 3 6 hours ago, sliderfra said: As both 278/280 pins are 3.3v & the 3 others are BL pins (that need 3.3V), you may solder blob the 278+280 & 23/25/27 then solder a single wire between them. I think that the easiest solution. One might even put a switch if mod is not needed to revert to standard specs. EDIT: you need to check schematics as MXM pinout on laptop might not be exactly the same. If you solder 3.3V on GND pin you end up with a dead short Yes, be careful when soldering because of short circuits! Link to comment Share on other sites More sharing options...
SuperMG Posted September 3 Author Share Posted September 3 19 hours ago, Developer79 said: Yes, be careful when soldering because of short circuits! Hello. Do you know the width of one MXM pin? Is it 0.3mm? 0.35mm? Literally no information online other than one thing... 0.5mm pitch, that's it. Here's how it should be. Link to comment Share on other sites More sharing options...
SuperMG Posted September 5 Author Share Posted September 5 (edited) On 9/3/2025 at 2:01 PM, SuperMG said: Hello. Do you know the width of one MXM pin? Is it 0.3mm? 0.35mm? Literally no information online other than one thing... 0.5mm pitch, that's it. Here's how it should be. Hello guys. I managed to finish the design and I'll find a manufacturer. Edit: I found a manufacturer for making the flex cable mod! It'll get produced on monday Edited September 6 by SuperMG Link to comment Share on other sites More sharing options...
SuperMG Posted Monday at 02:46 PM Author Share Posted Monday at 02:46 PM Hello some news! The manufacturing has started! I'll get the samples maybe this week, but I'm not sure. Here are some pictures on how the backlight mod should work: Here is how it should sit on the top side of the MXM card This mod will work on any Turing to Ada MXM cards that are lacking the 3 backlight panel pins and also the ones who have eDP or DP on port D! You'll finally have a display on your internal screen! 1 Link to comment Share on other sites More sharing options...
ssj92 Posted Monday at 03:32 PM Share Posted Monday at 03:32 PM 45 minutes ago, SuperMG said: Hello some news! The manufacturing has started! I'll get the samples maybe this week, but I'm not sure. Here are some pictures on how the backlight mod should work: Here is how it should sit on the top side of the MXM card This mod will work on any Turing to Ada MXM cards that are lacking the 3 backlight panel pins and also the ones who have eDP or DP on port D! You'll finally have a display on your internal screen! now this is interesting. Wonder if it'll help me run some cards on M17xR3 lol Alienware Area-51 18 : Intel Core Ultra 9 275HX @ ??? | nVidia GeForce RTX 5090 | BE200 | 1TB Gen5 9100 PRO Alienware Area-51M : Intel Core i9-9900K @ 5.3Ghz | nVidia GeForce RTX 2080 | AX210 | Samsung 970 Evo+ Alienware M18x R2 : Intel Core i7 3920XM @ 4.7Ghz | nVidia GeForce RTX 3080 | AX210 | Samsung 980 PRO Alienware 18 : Intel Core i7 4930MX @ 4.5Ghz | nVidia Quadro RTX 5000 | AX210 | Samsung 980 NVMe More Laps: M14x | M14xR2 | M15x (980m) | M17xR2 (RTX 3000) | M17xR3 (WX 7100) | M18xR1 (RTX 5000) BEAST Server: Intel Xeon W7-3465X 28 P-Cores | 2x nVidia RTX Titan | 128GB RDIMM | Intel Optane P5800X CS Studios YouTube: https://www.youtube.com/c/CSStudiosYT Link to comment Share on other sites More sharing options...
SuperMG Posted Monday at 03:43 PM Author Share Posted Monday at 03:43 PM 15 minutes ago, ssj92 said: now this is interesting. Wonder if it'll help me run some cards on M17xR3 lol M17X R4 is the same M17X R3 eDP in terms of MXM pinouts and connector. Did the Quadro Pascal or GTX 1070M ever work on the R3? Because they do on the R4. Link to comment Share on other sites More sharing options...
SuperMG Posted 12 hours ago Author Share Posted 12 hours ago New custom heatsink for the P570WM! Will arrive soon to me. I have 3 of them available, if someone wants to buy one, let me know. Compatible for the MXM cards with centered die! Such as RTX A3000,3060,3070,3070 Ti,3080, 3080 Ti,A4500,4080,4090 from X-VSION and ZRT! Up to 175W of heat compatibility! 4 heatpipes for the GPU cores and aluminium cooling for the VRAM/VRM! 1 Link to comment Share on other sites More sharing options...
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