# tool
sudo apt install nvme-cli
# mytest 01 3.6 GB/s Samsung SSD 990 EVO 1TB HKD$500
native Asus onboard nvme
sudo nvme list
Samsung SSD 990 EVO 1TB
$ time dd if=/dev/zero of=testfile bs=16k count=128k
131072+0 records in
131072+0 records out
2147483648 bytes (2.1 GB, 2.0 GiB) copied, 0.599403 s, 3.6 GB/s
# mytest 02 112 MB/s FreeNas NVME HKD$430
NVME over FreeNAS and TPLINK 1Gbe Switch
sudo nvme list
ADATA SX8200PNP
$ time dd if=/dev/zero of=/mnt/ricky/testfile bs=16k count=128k
131072+0 records in
131072+0 records out
2147483648 bytes (2.1 GB, 2.0 GiB) copied, 19.0907 s, 112 MB/s
# test
TEST: Samsung 990 EVO 1TB M.2 SSD
Read speed 5000 MB/s
Write speed 4200 MB/s
Interface PCIe 4.0 x4
TEST: ADATA XPG SX8200 Pro 1TB M.2 SSD
Read speed 3500 MB/s
Write speed 2800 MB/s
Interface PCIe 3.0 x4
# Network
1 Gbps = 125 MB/s
2.5 Gbps = 312.5 MB/s
10 Gbps = 1250 MB/s = 1.25 GB/s
25 Gbps = 3125 MB/s = 3.125 GB/s
40 Gbps = 5000 MB/s = 5 GB/s
# NVME
https://ssd-tester.com/m2_ssd_test.php?sort=&sort_interface=PCIe+5.0+x4
The following speed transfer rates are possible: Theoretical Practical
SATA 3 6 GBit/s (=750 MB/s) ~550 MB/s
PCIe 2.0 x2 10 GBit/s (=1.250 MB/s) ~800 MB/s
PCIe 2.0 x4 20 GBit/s (=2.500 MB/s) ~1,600 MB/s
PCIe 3.0 x2 16 GBit/s (=2.000 MB/s) ~1,600 MB/s
PCIe 3.0 x4 32 GBit/s (=4.000 MB/s) ~3,500 MB/s
PCIe 4.0 x4 64 GBit/s (=8.000 MB/s) ~7,500 MB/s
PCIe 5.0 x4 128 GBit/s (=16.000 MB/s) ~15,000 MB/s
