![]() But is this supposed to work that way? How come an Windows function is responsible for EVO performance that is advertised everywhere (not everyone uses Windows). So i just ticked it on back now and i got my write performance back. I got someone else to verify their EVO and do benchmark with that box ticked off and when they did it they suffered same performance drop. The very second I untick it all write speeds go to hell, and thats exactly what i did right before my issue started happening (was worried about that data loss). The box is ticked on by default with it on I get max speeds (250k+ write IOPS and 1800MB/s write speed). The first one is "turn on data write buffering for this device, increases system performance by turning in write buffering on drive but power loss or device failure may cause data loss" When I go to disk properties -> hardware -> properties -> change settings -> rules (2nd tab) there are two checkboxes there I think i found the culprit of performance drop but i still dont understand why it happens. When not doing anything, before or after test i can see my EVO go idle (<1% total host activity).ĭid you clone the os? In HWinfo64 temperature does not exceed 50 celcius. Storage: 3xOptane 900p 480GB - 4x Adata sx8200pro 1TB - Areca Raid-6 144TB- 4x samsung 850pro raid-0- 3x sm961 nvme 1TB MBs : Asrock x399 pro - Asorck. On Crystal Diskmark 6.0s sequential tests. What is going on? For the time of test i disconnected internet and disabled antivirus. Available in a capacious 1TB version and boasting screaming read/write speeds. Many SSDs come in a 2.5-inch form factor and connect to your PC via the same SATA port used by a traditional hard drive. The curious thing is that, i have a secondary windows installation on unconnected drive, if i connect that drive and then my EVO960 becomes a secondary non-OS drive, when i run Samsung Magician benchmark or Crystal Disk Mark, even when using Microsoft drivers im getting full performance including ~1800MB/s sequential write and over 200000 random write IOPS. ![]() Im using newest firmware, Samsung driver, PCIE runs in x4 mode gen 3. Samsung drives always hit or beat the rated speeds in both the excellent Samsung Magician software and in Crystal DiskMark. Read benchmarks are all good while read ones drop to hell, 4x less or even more. I tested both with Samsung Magician and Cristal Disk Mark. With EVO being OS/boot drive the write sequential write drops as low as 460MB/s, random write IOPS 20000. ![]() My Samsung EVO 960 500GB experiences massive write speed performance drop when its used as a OS boot drive (windows 10 pro 9). ![]()
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