[SOLVED] Samsung Evo850 M2 Performance Issues - Troubleshooting next steps?

dave562

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Nov 5, 2008
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I have two Samsung Evo850 SSD drives connected to an old Asus Z170 Pro Gaming MB (https://dlcdnets.asus.com/pub/ASUS/mb/LGA1151/Z170-PRO-GAMING/E10719_Z170_PRO_GAMING_UM_V2_WEB.pdf)

One is an Evo 850 SATA III (https://www.samsung.com/us/computin...0-evo-2-5-sata-iii-250gb-mz-75e250b-am/#specs)

The other is an Evo 850 M2 (https://www.samsung.com/us/computin...ives/ssd-850-evo-m-2-500gb-mz-n5e500bw/#specs)

They are both supposed to do ~500 MB/s sequential R/W.

According to Samsung Magician, the SATA III is 10x faster with ~5000 MB/s

SSD Performance Result

I looked up the Asus board specs and it doesn't fully define what performance I should except from the MB.

I want better M2 performance, but I don't want to buy a "faster" M2 drive only to figure out that it's going to be bottlenecked by the MB controller.

What is the best way to troubleshoot / assess the current storage bottleneck?
 
Solution
I have two Samsung Evo850 SSD drives connected to an old Asus Z170 Pro Gaming MB (https://dlcdnets.asus.com/pub/ASUS/mb/LGA1151/Z170-PRO-GAMING/E10719_Z170_PRO_GAMING_UM_V2_WEB.pdf)

One is an Evo 850 SATA III (https://www.samsung.com/us/computin...0-evo-2-5-sata-iii-250gb-mz-75e250b-am/#specs)

The other is an Evo 850 M2 (https://www.samsung.com/us/computin...ives/ssd-850-evo-m-2-500gb-mz-n5e500bw/#specs)

They are both supposed to do ~500 MB/s sequential R/W.

According to Samsung Magician, the SATA III is 10x faster with ~5000 MB/s

SSD Performance Result

I looked up the Asus board specs and it doesn't fully define what performance I...

kanewolf

Titan
Moderator
I have two Samsung Evo850 SSD drives connected to an old Asus Z170 Pro Gaming MB (https://dlcdnets.asus.com/pub/ASUS/mb/LGA1151/Z170-PRO-GAMING/E10719_Z170_PRO_GAMING_UM_V2_WEB.pdf)

One is an Evo 850 SATA III (https://www.samsung.com/us/computin...0-evo-2-5-sata-iii-250gb-mz-75e250b-am/#specs)

The other is an Evo 850 M2 (https://www.samsung.com/us/computin...ives/ssd-850-evo-m-2-500gb-mz-n5e500bw/#specs)

They are both supposed to do ~500 MB/s sequential R/W.

According to Samsung Magician, the SATA III is 10x faster with ~5000 MB/s

SSD Performance Result

I looked up the Asus board specs and it doesn't fully define what performance I should except from the MB.

I want better M2 performance, but I don't want to buy a "faster" M2 drive only to figure out that it's going to be bottlenecked by the MB controller.

What is the best way to troubleshoot / assess the current storage bottleneck?
You have "Rapid Mode" enabled. That is using system RAM to cache the C: drive which is giving you false benchmark results. It is working as designed.
 
Solution