Samsung SM951 NVMe M.2 PCIe 256GB SSD Review (Page 7)

| Jun 10, 2015 at 9:09 am CDT
Rating: 96%Manufacturer: Samsung

Iometer - Maximum IOPS

Version and / or Patch Used: Iometer 2014

We use Iometer to measure high queue depth performance.

Max IOPS Read

VIEW GALLERY - 56 IMAGES

Max IOPS Write

Samsung SM951 NVMe M.2 PCIe 256GB SSD Review 32 | TweakTown.com
Samsung SM951 NVMe M.2 PCIe 256GB SSD Review 33 | TweakTown.com

We normally test MAX IOPS with the test subject secure erased and no partition (FOB), but we did not secure erase the SM951 NVMe for any of our testing and decided to leave a partition on the drive for this test. This is the reason we were not able to hit Samsung's specification of 300/100K.

Iometer - Disk Response

Version and / or Patch Used: Iometer 2014

We use Iometer to measure disk response times. Disk response times are measured at an industry accepted standard of 4K QD1 for both write and read. Each test runs twice for 30 seconds consecutively, with a 5-second ramp-up before each test. We partition the drive/array as a secondary device for this testing.

Avg. Write Response

Samsung SM951 NVMe M.2 PCIe 256GB SSD Review 34 | TweakTown.com

Avg. Read Response

Samsung SM951 NVMe M.2 PCIe 256GB SSD Review 35 | TweakTown.com
Samsung SM951 NVMe M.2 PCIe 256GB SSD Review 36 | TweakTown.com

Write response times are good but not array good, or Intel 750 Series good. Read response times are again another lab record.

DiskBench - Directory Copy

Version and / or Patch Used: 2.6.2.0

We use DiskBench to time a 28.6GB block (9,882 files in 1,247 folders) composed primarily of incompressible random data as it's transferred from our DC P3700 PCIe NVME SSD to our test drive. We then read from a 6GB zip file that's part of our 28.6GB data block to determine the test drives read transfer rate. Our system is restarted prior to the read test to clear any cached data, ensuring an accurate test result.

Write Transfer Rate

Samsung SM951 NVMe M.2 PCIe 256GB SSD Review 37 | TweakTown.com

Read Transfer Rate

Samsung SM951 NVMe M.2 PCIe 256GB SSD Review 38 | TweakTown.com
Samsung SM951 NVMe M.2 PCIe 256GB SSD Review 39 | TweakTown.com

We expected the Intel drives to have the fastest read transfer rate, but the SM951 AHCI drive sets a new lab record. We tested several times to confirm this.

Last updated: Apr 7, 2020 at 12:33 pm CDT

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ABOUT THE AUTHOR -

Jon became a computer enthusiast when Windows XP launched. He was into water cooling and benching ATI video cards with modded drivers. Jon has been building computers for others for more than 10 years. Jon became a storage enthusiast the day he first booted an Intel X25-M G1 80GB SSD. Look for Jon to bring consumer SSD reviews into the spotlight.

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