We understand that you want to know if the cable that came with the Intel® SSD 750 Series will work with the Intel® Optane™ SSD 900P Series.
We would like to inform you that the cable is fully compatible with the Intel® Optane™ SSD 900P Series.
For further information you can refer to the following article:
Frequently Asked Questions for Intel® Optane™ SSD 900P Series - Intel.com
If you have further questions then feel free to contact us again.