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发表于 2019-6-6 02:35:03| 字数 1,618| - 韩国 SK电信
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本帖最后由 leokim 于 2019-6-6 21:54 编辑
I carried out the long-delayed P70 MXM upgrade plan a few days ago. As you know,
the Thinkpad P70 has an MXM Slot that can replace graphics cards. Replacing the Thinkpad P70 with a graphics card requires some effort and skill.
First, you need to modify the Bios code to pass Intel Bootguard. You cannot modify even one bit of BIOS code while Intel Bootguard is enabled.
Second, in order to install graphics card drivers without difficulty, you must modify the bios code for the subsystem ID.
Otherwise, you need to set up your graphics card driver manually. Subsystem ID of Maxwell graphic card is located in ‘HybridsystemCC module’.
Search a HEX String “ F1 22 17 AA” or “ 17 AA” . Two subsystem ID should be changed for Hybrid Graphic and Discrete Graphic.
Third, the MXM graphics card purchased must have a Vbios certified by Lenovo.
Fourth, in order to use UEFI mode, the GOP code module for the Pascal graphics card must be inserted into the genuine P70 bios.
For this project, I recently brought a P4000 MXM Card from Germany.
After a few hours of modification, I finally made a final modification Bios,
and finally I was able to install the P4000 MXM card without any problems on the P70.
I can install a P3000/P4000/P5000 graphics card by modifying the BIOS. Of course, I can install the MXM card on the P3200/P4200/P5200 in case of modifying bios code furtuer.
Besides MXM Replacement, Install a B173Zan01.0 (400nit, Adobe 100% Color Gamut). For Color calibrator Sensor, I modfied the EEPROM of B173zan01.0.
You should unlock or unprotected your SPD EEPROM ( 512KB or 256KB ) before flashing modified SPD flash image and desolder 10Kohm Pulldown resistor on EEPROM Pin 3.
For Overclocking and Undervolting, I also activate Bios Advanced Menu.
* As you know or not, I can't make a universal modified p70 Bios since bios has its own mac address,TPM key, Windows DPK ( Digital Product Key) and Intel Management Engine ,
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