Does hp envy 13 ba1501tx laptop support full gen 4 ssd speed from ssd like wd sn850x?

[Paul_Tikkanen]

The 13 ba1501tx's NVMe slot is PCIe Gen 3.0, which is why the WD Blue is not working at its maximum advertised read/write speeds.

This table shows the maximum transfer speeds that each PCIe slot generation can support, so you are getting pretty close to that.

PCIe Speeds and Limitations | Crucial.com

[Paul_Tikkanen]

The processor specs from Intel show the processor to be PCIe Gen 4.0, but the chipset to be PCIe Gen 3.0.

Intel Core i51135G7 Processor 8M Cache up to 4.20 GHz Product Specifications

If the slot was Gen 4.0, the Gen 4.0 drive should be working almost twice as fast.

The parts list for your notebook indicate that the original drive HP installed in your notebook is PCI e Gen 3.0.

HP PartSurfer

L85364-005

Solid-state drive 512GB M2 2280 PCIe NVM

HP L85364-005 - 512GB M.2 2280 PCIe NVMe Solid State Drive - Drive Solutions

If the NVMe slot was Gen 4.0, it would make no sense that HP would have installed a Gen 3 SSD. in one of their Envy notebooks.

That is all the information I can provide.