AGI AI858 2TB M.2 SSD
Here you will find a detailed speed, performance and benchmark test review. Tested was the M.2 NVMe SSD AI858 with 2TB (AGI2T0G00AI858-CB) from the brand AGI.
| Technical specifications (manufacturer information) | |
| Product image |
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| Manufacturer | AGI |
| Model number | AGI2T0G00AI858-CB |
| Capacity | 2048 GB (1908 GiB) |
| pSLC cache | 390 GB approx. |
| Read speed | 14000 MB/s |
| Write speed | 13000 MB/s |
| Interface | PCIe 5.0 x4 |
| Connector | M.2 2280 |
| Memory module (NAND) | TLC |
| DRAM cache | ✓ Yes |
| TBW (Total Bytes Written) | 1500 terabyte |
| Warranty | 5 Years |
| Controller | Silicon Motion SM2508 |
Compare product Compared to the test winner*
v0.275a OS: 10.0 build 26200 Drive : 0(NVME) Scsi : 1 Driver : W10 Model : AGI2T0G00AI858 Fw : Y0702A00 Size : 1953514 MB [2048.4 GB] LBA Size : 512 AdminCmd : 0x00 0x01 0x02 0x04 0x05 0x06 0x08 0x09 0x0A 0x0C 0x10 0x11 0x14 0x80 0x81 0x82 0x84 0xC0 0xC1 0xC2 0xC6 I/O Cmd : 0x00 0x01 0x02 0x04 0x05 0x09 0x0C Controller: SM2508 [SM2508AC] FW revision: Y0702A00 ROM version: 2508ACROM:X0613A --- FW params --- FlashID : 0x2c,0xd3,0x8,0x32,0xe8,0x30,0x0,0x0 - Micron 232L(B58R) TLC 1024Gb/CE 1024Gb/die Channel : 8 Ch map : 0xFF CE map : 0x03 Pages/Block : 2784 First Fblock : 2 Total Fblock : 567 Bad Block From Pretest: 19 Start TLC/MLC Fblock : 13 DRAM Info : [0x4E 0xD2] IOCtl: NVME_W10_GetLog 0x1! Telemetry unavailable
We put the AGI NVMe M.2 SSD through a detailed test. You can find the test result / test report here:
AS SSD Benchmark
Standard performance test
The standard test was performed with a 5 GB file. A total score of 7762 points was achieved.
Copy performance test
A common everyday scenario is simulated here. Three test folders are created:
- ISO (folder with two large files)
- Program (folder with many small files)
- Game (folder with small and large files)
The three folders are copied using the Windows copy command (cache remains enabled). The real-world test from 31 March 2026 shows performance during simultaneous write and read operations. The lower the duration, the better.
| AS SSD Copy Benchmark | Transfer rate: | Duration: |
|---|---|---|
| ISO two large files |
3,746.59 MB/s |
0.61 s |
| Program typical program folder with many small files |
1,267.92 MB/s |
5.55 s |
| Game a game folder with small and large files |
2,490.22 MB/s |
2.77 s |
Compression performance test
Here, speed is measured depending on how compressible the data is.
CrystalDiskMark Benchmark
Similar to AS SSD, two sequential and two random performance tests are carried out here and the write and read speed (manufacturer specs: 14000 MB/s and 13000 MB/s) the AGI SSD is measured.

| CDM | Read [MB/s] | Write [MB/s] |
|---|---|---|
| SEQ1M Q8T1 |
14,201.40 |
13,406.60 |
| SEQ1M Q1T1 |
5,447.80 |
9,812.83 |
| RND4K Q32T16 |
5,519.93 |
4,422.01 |
| RND4K Q1T1 |
76.79 |
234.51 |
IOPS (Input/Output operations per second)
| CDM | Read [IOPS] | Write [IOPS] |
|---|---|---|
| SEQ1M Q8T1 |
13,543.60 |
12,785.50 |
| SEQ1M Q1T1 |
5,195.40 |
9,358.20 |
| RND4K Q32T16 |
1,347,640.00 |
1,079,590.00 |
| RND4K Q1T1 |
18,746.60 |
57,253.90 |
Average latency
| CDM | Read [µs] | Write [µs] |
|---|---|---|
| SEQ1M Q8T1 |
577.59 |
624.24 |
| SEQ1M Q1T1 |
192.16 |
106.73 |
| RND4K Q32T16 |
370.93 |
465.35 |
| RND4K Q1T1 |
53.24 |
17.39 |
ATTO Disk Benchmark
Here, a 256 MB file is written to the AGI NVMe M.2 SSD multiple times. The I/O block size varies (from 512 bytes to 64 megabytes). The larger the blocks, the faster writing and reading usually becomes.

smartctl: Supported Power States & LBA Sizes
=== START OF INFORMATION SECTION === Model Number: AGI2T0G00AI858 Serial Number: AGIPEJYWK0700360 Firmware Version: Y0702A00 PCI Vendor/Subsystem ID: 0x126f IEEE OUI Identifier: 0x486834 Total NVM Capacity: 2.048.408.248.320 [2,04 TB] Unallocated NVM Capacity: 0 Controller ID: 0 NVMe Version: 2.0 Number of Namespaces: 1 Namespace 1 Size/Capacity: 2.048.408.248.320 [2,04 TB] Namespace 1 Formatted LBA Size: 512 Namespace 1 IEEE EUI-64: 486834 0000000000 Local Time is: Tue Mar 31 13:31:45 2026 MS Firmware Updates (0x14): 2 Slots, no Reset required Optional Admin Commands (0x0017): Security Format Frmw_DL Self_Test Optional NVM Commands (0x00d7): Comp Wr_Unc DS_Mngmt Sav/Sel_Feat Timestmp Verify Log Page Attributes (0x3a): Cmd_Eff_Lg Telmtry_Lg Pers_Ev_Lg Log0_FISE_MI Maximum Data Transfer Size: 128 Pages Warning Comp. Temp. Threshold: 83 Celsius Critical Comp. Temp. Threshold: 85 Celsius Namespace 1 Features (0x0a): NA_Fields No_ID_Reuse Supported Power States St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat 0 + 10.00W - - 0 0 0 0 0 0 1 + 4.00W - - 1 1 1 1 100000 100000 2 + 3.00W - - 2 2 2 2 50000 450000 3 - 0.0250W - - 3 3 3 3 5000 2500 4 - 0.0035W - - 4 4 4 4 5000 8000 Supported LBA Sizes (NSID 0x1) Id Fmt Data Metadt Rel_Perf 0 + 512 0 0 1 - 4096 0 0
You can find information about the test system at the bottom of the homepage.
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