Did you install the NVMe* drivers? If so, please make sure you are running the latest version: Download Intel® Solid-State Drive Data Center Family for NVMe Drivers - Also, if you could, please provide us the SMART Details so we can take a look at it. We were wondering if you could use the PCIe* SSD without the GPU.
I will run through the performance guide as soon as I get home this evening. But the speed tests seem in line with the specifications provided by Intel and occasionally above the estimates.
I'm not dissatisfied with the performance of the read and write.
The latest NVMe* drivers are installed.
Firmware is up to date on all components.
Yesterday I read on some places that during the install if other drives are installed, windows may confuse partitions on other SSDs, so I may or may not have fixed the situation by doing the following.
I took the time to erase both my Samsung Pro SSD, and the PCIe 750 SSD.
I then installed Windows 7 onto the Intel 750 PCIe drive after a full format and erase of all the partitions.
I did this while no other drive was installed at all and it went well. System seems very smooth and snappy.
*Note: it did require a second cd drive in my machine as the board I use has USB 3.0 only, and the drivers are not on the windows 7.0 install disc, thus inactive and useless.
without another HDD or a USB thumb drive to pull the driver's from I was unable to load the latest NVMe* drivers during the install process in order to see the drive.
I then installed windows 10 separately onto the Samsung SSD. It's also running very well.
During this install I turned off the 750 by deactivating that channel using the dim switches on my board so it was not confused. this was just easier than unplugging the card.
Windows 10 runs great on the SATA SSD.
Windows 7 runs great on the PCIe 4x slot.
The lag seems to have vanished, but I'm very hesitant to install windows 10 onto my Intel 750 PCIe SSD again.
I will note that the PCIe drive appeared to be sharing partitions on my old SSD. As the computer booted fine from the 750 after installation of windows, but when I originally was having issues I formatted the Samsung SSD, and in doing so the Intel 750 card became Unbootable. I couldn't figure out how 750 would be affected by formatting another drive, but I think it was the installation of windows 10 while another copy was in the computer in a separate drive and some lettering issues. It kept saying there were missing files but would not allow me to repair or install windows onto the 750 any more.
I'll post further after more testing tonight and tomorrow for confirmation in case this would help someone else.
If I'm feeling brave I'll unhook the drives again and try for a clean install of 10 on the 750... or an upgrade perhaps.
I think the issue was more with windows and less with the hardware.
Well as soon as I got home and started working on the computer again the lag returned. Nothing running or eating up CPU or file transferring. No heavy downloading or work flow. just looking at data and surfing the internet getting lags and hang ups. freezing for a 6 to 7 seconds when trying to move a file from one folder to another. about 100 MB.
Oddly... I don't see the normal S.M.A.R.T. Data... is that normal?
Did you have the opportunitiy to try a secure erase and reload the OS to see what happens?