Z97 Extreme 6 and Slow Ultra M.2 Speeds

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   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

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awilson Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 29 Apr 2020 Status: Offline Points: 5	Post Options Post Reply Quote awilson Report Post Thanks(0) Quote Reply Topic: Z97 Extreme 6 and Slow Ultra M.2 Speeds 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

awilson Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 29 Apr 2020 Status: Offline Points: 5	Post Options Post Reply Quote awilson Report Post Thanks(0) Quote Reply 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?

awilson Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 29 Apr 2020 Status: Offline Points: 5	Post Options Post Reply Quote awilson Report Post Thanks(0) Quote Reply 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?