Intel 750 : high read latency

[NMICH1]

Hello,

I am using a 400gb Intel 750 (pcie card) on a Z97 board.

Using AS SSD, I find that the read latency is about 4 times higher than what I see from reviews (0.08ms vs 0.02ms). The write latency is ok. The 0.02ms seems in line with the specs of the drive, so it appears that my system is slow.

I tried moving to the CPU lanes to see if that was a factor. As expected, I got a nice boost in seq read, but no change in latency :

Example from the web (Google image search for "intel 750 asssd") :

Any idea of what I should look for to obtain "normal" read latencies ? I tried disabling real-time protection in Windows Defender, but no change there.

Platform :

Windows 10 AU

NVME driver 1.7

Intel 4790k

16 Gb RAM

Maximus VII Hero (Z97)

Intel 750 400Gb

[idata]

Latenic,

It is important to make sure you are connected to the right slot. The board contains:2 x PCIe 3.0/2.0 x 16 slots (Red, Single at x16 or dual at x8/x8 mode)1 xPCIe 2.0 x16 slot (Black, max. at x4 mode)3 x PCIe 2.0 x1 slotsOn Chapter 3 page 34, it shows the configuration, please, follow the instructions there and let us know if it worked for you. Unfortunately, as for a validation guide, thank you for your feedback, but there is no validation guide available.Please let us know if this helped you.Best regards,Aleki

[NMICH1]

It did not.

As stated in my first post, I tried running the benchmark when connected to the CPU lanes (red slot). I verified that the card was operating in PCIE 3 mode. But the reported latency remained unchanged.

Best regards.

[idata]

Latenic,

According to the logs you have sent, it says it is PCIe* gen 2. Please, check if you are running the latest BIOS firmware and also check if there isn't any settings in the BIOS that could be limiting the PCIe* version used on the slot.Best regards,Aleki

[idata]

Latenic,

We haven't heard from you in while so we would like to know if you had the opportunity to try the steps we have provided previously.Best regards,Aleki