GTX 950M 4GB GDDR5, 30m of stress test and it's stable. The vBios is modded and I didn't touch the voltage table. Stock frequencies were 928mhz core clock (it doesn't have boost)
For ACER VN7-792G Laptop motherboard 15205-1M with I5-6300HQ I7-6700HQ CPU GTX 950M GPU 100% Tested Fully Work - AliExpress
Test NVIDIA GeForce GTX 950M DDR3 vs. GDDR5 - Notebookcheck.com Tests