Silicon Power UD85 1TB M.2 SSD

Here you will find a detailed speed, performance and benchmark test review. Tested was the M.2 NVMe SSD UD85 with 1TB (SP01KGBP44UD8505) from the brand Silicon Power.

Performance score 
4195
Price/GB
0.51 $
Read
3,600 MB/s
Write
2,800 MB/s
Connector
M.2 2280
Interface
PCIe 4.0 x4
Technical specifications (manufacturer information)
Product image Product image UD85
Manufacturer Silicon Power  
Model number SP01KGBP44UD8505
Capacity 1024 GB (954 GiB)
pSLC cache 256 GB approx.
Read speed 3600 MB/s
Write speed 2800 MB/s
Interface PCIe 4.0 x4
Connector M.2 2280
Memory module (NAND) QLC
DRAM cache No
TBW (Total Bytes Written) 600 terabyte
Controller Realtek RL6817
  Current price
~ 524 $
(= 0.51 $ / GB)
In stock
Buy now  
Retailer     #ad
Compare product Compared to the test winner*
Read speed
64 %
Write speed
42 %
*) Test result rated by AS SSD score within the same capacity.
   v0.15a
OS: 10.0 build 19045 
Drive   : 0(NVME)
Scsi    : 2
Driver  : W10
Model   : SPCC M.2 PCIe SSD                       
Fw      : VF001C27
HMB     : 32768 - 65536 KB (Enabled, 64 M)
Size    : 976762 MB [1024.2 GB]
LBA Size: 512
Fw Str  : [REALTEK_RL6817  L     _p_tN38AV] []
Bank00: 0x89,0xd3,0xac,0x32,0xc6,0x0,0x0,0x0 - Intel 144L QLC 1024Gb/CE 1024Gb/die
Bank08: 0x89,0xd3,0xac,0x32,0xc6,0x0,0x0,0x0 - Intel 144L QLC 1024Gb/CE 1024Gb/die
Bank16: 0x89,0xd3,0xac,0x32,0xc6,0x0,0x0,0x0 - Intel 144L QLC 1024Gb/CE 1024Gb/die
Bank24: 0x89,0xd3,0xac,0x32,0xc6,0x0,0x0,0x0 - Intel 144L QLC 1024Gb/CE 1024Gb/die
Bank32: 0x89,0xd3,0xac,0x32,0xc6,0x0,0x0,0x0 - Intel 144L QLC 1024Gb/CE 1024Gb/die
Bank40: 0x89,0xd3,0xac,0x32,0xc6,0x0,0x0,0x0 - Intel 144L QLC 1024Gb/CE 1024Gb/die
Bank48: 0x89,0xd3,0xac,0x32,0xc6,0x0,0x0,0x0 - Intel 144L QLC 1024Gb/CE 1024Gb/die
Bank56: 0x89,0xd3,0xac,0x32,0xc6,0x0,0x0,0x0 - Intel 144L QLC 1024Gb/CE 1024Gb/die

We put the Silicon Power 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 4195 points was achieved.

AS SSD Benchmark Screenshot: TEST: Silicon Power UD85 1TB
AS SSD Read: Write:
Seq
in megabytes per second
4,206.27 MB/s
2,740.34 MB/s
4K
in megabytes per second
63.70 MB/s
160.67 MB/s
4K-64Thrd
in megabytes per second
874.26 MB/s
1,764.16 MB/s
Access time
in milliseconds
0.024 ms
0.124 ms
Score
1359
2199
Total score 
4195

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 09 January 2024 shows performance during simultaneous write and read operations. The lower the duration, the better.

AS SSD TEST: Silicon Power UD85 1TB
AS SSD Copy Benchmark Transfer rate: Duration:
ISO
two large files
1,942.13 MB/s
1.18 s
Program
typical program folder with many small files
1,218.01 MB/s
5.78 s
Game
a game folder with small and large files
1,996.55 MB/s
3.46 s

Compression performance test

Here, speed is measured depending on how compressible the data is.

AS SSD TEST: Silicon Power UD85 1TB

CrystalDiskMark Benchmark

Similar to AS SSD, two sequential and two random performance tests are carried out here and the write and read speed (manufacturer: 3600 MB/s and 2800 MB/s) the Silicon Power SSD is determined.

CrystalDiskMark Benchmark Screenshot: TEST: Silicon Power UD85 1TB
CDM Read [MB/s] Write [MB/s]
SEQ1M
Q8T1
4,778.73
2,913.69
SEQ1M
Q1T1
3,872.45
2,919.07
RND4K
Q32T16
960.23
2,004.32
RND4K
Q1T1
71.62
176.76

IOPS (Input/Output operations per second)

CDM Read [IOPS] Write [IOPS]
SEQ1M
Q8T1
4,557.40
2,778.70
SEQ1M
Q1T1
3,693.10
2,783.80
RND4K
Q32T16
234,431.00
489,335.00
RND4K
Q1T1
17,485.80
43,153.80

Average latency

CDM Read [µs] Write [µs]
SEQ1M
Q8T1
1,754.29
2,873.96
SEQ1M
Q1T1
270.62
358.95
RND4K
Q32T16
2,176.87
1,043.33
RND4K
Q1T1
57.08
23.05

HD Tune Pro long-term test

A long-term test was performed to fully utilize the storage. You can see from when a possible cache is full and write performance drops. A test file of 300 GB was written to the medium. After approx. 256 GB, the cache was full and performance was throttled.
The test file could at least be read with an average read speed of 2,875 MB/s and written at 706 MB/s.

HD Tune endurance test TEST: Silicon Power UD85 1TB

HD Tune Pro Benchmark

HD Tune writes a 5 GB file to the Silicon Power NVMe M.2 SSD. The transfer data of the read speed is displayed graphically. The minimum, maximum and average values are also determined. The measured access time and burst rate are also shown.

HD Tune TEST: Silicon Power UD85 1TB

ATTO Disk Benchmark

Here, a 256 MB file is written to the Silicon Power 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: Silicon Power UD85 1TB

SSD-Z Benchmark

Similar to HD Tune, a 500 MB file is written to the Silicon Power NVMe M.2 SSD here. The transfer data is displayed. The more consistent the line, the better. Unfortunately, the tool no longer works correctly from around 4,000 MB/s and no line is displayed (and sometimes incorrect min/max data is shown).

SSD-Z TEST: Silicon Power UD85 1TB


You can find information about the test system at the bottom of the homepage.
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