![]() ![]() The other solution would be to connect my two SATA drives to different SATA ports that did not share bandwidth with the 3rd PCIe slot. The problem with that is that it puts the Intel 900P too close to the Radeon 5700XT video card, which would reduce the effectiveness of the cooling fans on the video card. One would be to move the Intel 900P from the third PCIe slot to the second PCIe slot. Once I realized this, I had two ways to fix the issue. This smaller capacity SKU has lower write performance than the 1TB or upcoming 2TB models. Keep in mind that this is only the 500GB size of the Samsung 980 PRO. The Samsung 980 PRO is my boot drive, and it is in the M.2 slot closest to the CPU. That high queue depth makes NAND storage look better. Here they are from the fastest to the slowest. I did some quick and dirty I/O testing of these six drives with CrystalDiskMark 7.0.0. Finally, the Intel Optane SSD is using the Intel NVMe driver version 5.1 Some Quick Comparative CrystalDiskMark Results in 2020 Samsung has not released an NVMe driver for the Samsung 980 PRO, and I don’t think they are planning on it. The Samsung 980 PRO is using the Microsoft NVMe driver, while the Samsung 970 EVO Plus drives are using the Samsung NVMe driver version 3.3. 280GB Intel Optane 900P PCIe 3.0 NVMe SSD.(2) 1TB Samsung 970 EVO Plus M.2 PCIe 3.0 NVMe SSD. ![]() 500GB Samsung 980 PRO M.2 PCIe 4.0 NVMe SSD.There are three M.2 PCIe NVMe SSDs, one AIC PCIe NVMe SSD, one 2.5″ SATA SSD, and one 3.5″ SATA HDD. PCIe 4.0 has twice the bandwidth per lane compared to PCIe 3.0. The latest generation video cards from both AMD and NVIDIA support PCIe 4.0. In my case, I have an AMD Radeon 5700XT video card that is PCIe 4.0. You can minimize any possible impact from this by using a PCIe 4.0 video card instead of a PCIe 3.0 video card. This might sound bad, but it is actually not a problem for most scenarios. That means eight PCIe lanes instead of sixteen lanes. If you use the 2nd or 3rd M.2 slot (even for a PCIe 3.0 device), it causes the primary PCIe slot to go from PCIe 4.0 x16 down to x8. Using the Peak Performance profile we couldn't get close to those figures with a best read figure of 666,437.74 IOPS and 541,103 IOPS for writes, both from the default setting.The B550 AORUS MASTER has three M.2 PCIe 4.0 slots that are all connected to the CPU. Seagate rate the 4K performance of the drive as up to 1,000,000 IOPS for read and writes. Using the more advanced CrystalDiskMark 8 in its default setting as well as the Peak Performance and Real World profiles saw the Sequential test results confirm the official 7,300MB/s reads and 6,900MB/s writes with the best test results of 7,401MB/s and 6,880MB/s for reads and writes respectively. Looking at all the CrystalDiskMark results screens we can see that the Phison E18 controller that powers the FireCuda 530 is much more efficient when reading compressible sequential and 4K data at certain queue depths. The best-tested write figure of 6,880MB/s also confirms the official best of 6,900MB/s. With CrystalDiskMark could also confirm the official Sequential maximum performance read figure for the drive of 7,300MB/s with a test result of 7,400MB/s. The FireCuda 530 seems to struggle with CrystalDiskMark's QD32 1 Thread test as it sits in the bottom half of our result chart. CrystalDiskMark is a useful benchmark to measure theoretical performance levels of hard drives and SSDs. ![]()
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