Intel Motherboards - Z97 Extreme 6 and Slow Ultra M.2 Speeds

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Z97 Extreme 6 and Slow Ultra M.2 Speeds

Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=14248
Printed Date: 03 Aug 2025 at 2:47pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Z97 Extreme 6 and Slow Ultra M.2 Speeds

Posted By: awilson
Subject: Z97 Extreme 6 and Slow Ultra M.2 Speeds
Date Posted: 30 Apr 2020 at 12:05am

I have a Z97 Extreme 6 running Bios 2.80 and when I speed test the Samsung 970 Evo Plus in the Ultra M.2. using CrystalDiskMark I get slow Read speed roughly around 2400 MB/s. If I put the same NVME into an adapter and run the test again using PCEe Slot 2 I get 3200 MB/s - the Write speed always retrurns roughly 2900 MB/s in both cases.

I have tried the following but am out of ideas:

* Tried loading UEFI defaults
* Reinstall of Windows 10 1909
* CrytstalDiskInfo reports PCIe 3.0 x4 for both supported and operating speeds
* Installed Samsung NVME drivers 3.3
* Ran the same benchmarks with ATTO HD benchmark
* Checked through the bios to see if anything is wrongly configured

Anything I have missed? TIA

Replies:

Posted By: awilson
Date Posted: 01 May 2020 at 6:50pm

Tried another EVO 970 Plus with the same results - Does this need any additonal drivers to run at full speed like Intel RST or other bios settings?

Posted By: awilson
Date Posted: 06 May 2020 at 5:03pm

Gave up waiting for a response and have sent to the official support - kinda sucks as are ASRock not monitoring the support queries here?