Any and all notebook modifications that I can make to my notebooks. You will read about my overclocking and modifying adventures.

Friday, August 7, 2009

Getting a 2x PCIe Port from a MiniPCIe Port for an External Graphics Card

While I was working on this, it came to my attention that a miniPCIe port actually has some reserved pins to be used as another PCIe lane. So it should be possible to get a 2x port from just one miniPCIe port.

Please read this before reading the rest of my post.
Also read the following PDF:
http://leotardi.no-ip.com/html/eeepc/download/pciexpress_mini_cem_10.pdf

Now that you're up to speed on things, here is what I have been able to find with a DMM:
http://i896.photobucket.com/albums/ac167/moral_HaZaRd/nowpins.jpg
The picture shows which pins I found were connected to GND.

There is a resistance between pins 49 and 47. There is no connection between pins 41 and 39. There is no connection between pins 33 and 31. There is a resistance between pins 25 and 23.

Next I will check the voltage between pins 49&47, pins 41&39, pins 33&31 and also pins 25&23 while my notebook is on.

Cooling

My notebook reached 85C in 1min while running ORTHOS. I changed the thermal paste to some coolermaster paste (since it's what I had) the maximum temp went to 74C.
I removed the old paste with some mentholated spirits. I spread the new paste evenly and on both the CPU and the heatsink. I made the thinnest layer that I could and the most even layer.

I then undervolted the cpu by using RMclock (I followed the guide here, the maximum temp now is 62C. I took my volts from:
6x 0.8500V
7x 0.9500V
8x 1.0357V
9x 1.1375V
10x 1.2375V

To:
6x 0.8500V
7x 0.8500V
8x 0.8625V
9x 0.9125V
10x 0.9750V

This is when my CPU is @2ghz, when I overclock I increase the voltage just enough to keep it stable.

When I overclock to 2.7ghz the cpu gets above 85C, soon I will install a small 6mm thick DC 5V Blower Fan. I will connect it directly to usb power and use a small switch to turn it on/off.

Notebook Hack

Notebook Hack

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