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.

Performance score 
7762
Price/GB
0.25 $
Read
14,000 MB/s
 Write
13,000 MB/s
Connector
M.2 2280
Interface
PCIe 5.0 x4
Technical specifications (manufacturer information)
Product image Product image AI858
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
  Current price
~ 513 $
(= 0.25 $ / GB)
Compare product Compared to the test winner*
Read speed
95 %
Write speed
95 %
*) Test result rated by AS SSD score within the same capacity.

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.

AS SSD Benchmark Screenshot: TEST: AGI AI858 2TB M.2 SSD
AS SSD Read: Write:
Seq
in megabytes per second
9,755.81 MB/s
10,024.50 MB/s
4K
in megabytes per second
68.84 MB/s
213.44 MB/s
4K-64Thrd
in megabytes per second
1,634.42 MB/s
2,480.46 MB/s
Access time
in milliseconds
0.035 ms
0.115 ms
Score
2679
3696
Total score 
7762

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 TEST: AGI AI858 2TB M.2 SSD
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.

AS SSD TEST: AGI AI858 2TB M.2 SSD

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.

CrystalDiskMark Benchmark Screenshot: TEST: AGI AI858 2TB M.2 SSD
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.

ATTO Disk Benchmark TEST: AGI AI858 2TB M.2 SSD

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


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