Worl First P870xxx MXM SLI To 16x PCI-E

[rainer124]

 

World's first MXM SLI on PCI-E 16x connection. The P870 can only support 8x per MXM slot because the necessary connections are missing! And a small hardware change is also required to enable 16x, as it's currently disabled at the hardware level! I even tried rerouting the connections from the slave MXM port to the master MX port on a P870TM motherboard. It actually worked, and you can run all RTX MXM cards at 16x! Tested with AMD ,RTX2060, 380 and 4070

Th mini HDMi is one for internal Display and one for external Display port Conector on mainboard. Also Works with internal Display.

The Connection is from DP Port on card to Mini HDMI Connector

(The Mnini HDMI is A Display port connector !) 

The mini HDMI was only practical because it is very thin and a mini DisplayPort would be too thick.

[rainer124]

And The 

Here's a P870TM wired with a 16x slave mxm to master MXM Slot.

Works perfectly.

[rainer124]

you can See the benchmak Result on 3d Mark user Rainer124  .

i make 1 With Ralfs 16x sli mxm adapter, one With riser m.2 NVME to mxm adapter an one Thunderbold3 Benchmark

all with Sam configuration RTx 2060, 8700k....... Same Laptop.

and a Big Problem is the P870dm3 not work with aPCI-E graphics Card the fan goes to 100% an the system automaticly shutdown in 2 minutes.

Also not work with without a mxm card , or only an nvme riser adapter shut down autoaticly 2 minutes.

 A temperature signal must be sent to the SM bus

(on master mxm port SM_DAT (SMBus Data): Pin 272 SM_CLK (SMBus Clock): Pin 274 ) every second; otherwise, it will beep and shut down.

 

I solved the problem with an Arduino! It sends a signal every second with 27 degrees.

[rainer124]

Here is The Picture GTX 1070 mxm With 16x PCI-E 3.0 on P870TM

[rainer124]

 

Unfortunately, Clevo didn't include a multiplexer here that automatically switches the other 8 lanes to the master multiplexer when only one card is inserted! 😉

[rainer124]

42 minutes ago, rainer124 said:

And The 

Here's a P870TM wired with a 16x slave mxm to master MXM Slot.

Works perfectly.

The lanes must be perfectly parallel, otherwise it won't work!