AS SSD Benchmark NVMe Results Explained: Technical Interpretation, Troubleshooting, and Best Practices

This knowledge base article explains how to interpret AS SSD Benchmark results for NVMe SSDs, diagnose abnormal performance, and apply best practices for production, enterprise, and professional desktop environments.

It is intended for:

• IT administrators

• Desktop & server support engineers

• System integrators

• Power users managing NVMe-based systems

The article focuses on technical accuracy, real-world performance meaning, and actionable troubleshooting steps.

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Product / Tool Overview

AS SSD Benchmark

AS SSD Benchmark is a Windows-based disk benchmarking utility designed to:

• Measure sequential and random I/O performance

• Evaluate access latency

• Score SSDs independent of OS cache

• Detect alignment and driver-related issues

Key characteristics

• Uses incompressible data

• Bypasses file system cache

• Focuses on real-world SSD behavior

• Commonly used for SATA and NVMe SSD validation

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Understanding NVMe SSD Architecture (Technical Context)

NVMe SSDs operate over PCI Express (PCIe) instead of SATA, enabling:

• Parallel I/O queues (up to 64K queues)

• Reduced latency

• Higher throughput

• Better multi-threaded performance

Key architectural factors affecting benchmark results:

• PCIe generation (Gen3 / Gen4 / Gen5)

• NVMe driver (Microsoft vs vendor)

• CPU PCIe lanes

• Thermal throttling

• Queue depth handling

• Firmware optimization

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AS SSD Benchmark Metrics Explained

1. Sequential Read / Write (Seq)

Metric	Meaning
Seq Read	Large contiguous file read speed
Seq Write	Large contiguous file write speed

Typical NVMe expectations

• PCIe Gen3 x4: 3000–3500 MB/s

• PCIe Gen4 x4: 5000–7000 MB/s

Use cases

• OS boot

• Large file transfers

• Imaging and backups

• Video editing

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2. 4K Random Read / Write (QD1)

Metric	Meaning
4K Read	Small-file random read
4K Write	Small-file random write

Why it matters

• Application launch speed

• Windows responsiveness

• Registry access

• Log file handling

Low 4K performance = system feels slow

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3. 4K-64Thrd (High Queue Depth)

Metric	Meaning
4K-64Thrd	Multi-threaded random I/O

Critical for

• Heavy multitasking

• Virtual machines

• Databases

• Development workloads

NVMe SSDs excel here due to parallel queue design.

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4. Access Time (Latency)

Metric	Meaning
Read Latency	Time to access data
Write Latency	Time to write data

Healthy NVMe values

• Read: < 0.1 ms

• Write: < 0.05 ms

High latency often indicates:

• Driver issues

• Power management interference

• Thermal throttling

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5. AS SSD Score

Score Type	Meaning
Read Score	Overall read performance
Write Score	Overall write performance
Total Score	Combined SSD efficiency

General interpretation

• < 1000 → SATA SSD

• 2000–4000 → Entry NVMe

• 5000+ → Strong NVMe

• 8000+ → High-end Gen4+

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Use Cases and Environments

Validated Environments

• Windows 10 / 11 (UEFI)

• Professional workstations

• Developer systems

• Virtualization hosts

• SMB file servers (non-RAID)

Not Ideal For

• RAID controller validation

• Linux environments

• NAS benchmarking

• SAN storage testing

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Step-by-Step: Running AS SSD Correctly

1. Preparation

• Close background applications

• Disable third-party antivirus temporarily

• Ensure SSD has ≥15% free space

• Let system idle for 5 minutes

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2. Run Benchmark

1. Launch AS SSD Benchmark

2. Select NVMe drive

3. Keep test size at 1GB

4. Click Start

5. Wait until completion (no multitasking)

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3. Verify Alignment

Alignment: OK

If not OK → partition misalignment (performance loss up to 40%)

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Common Problems, Root Causes, and Fixes

Issue: Low Sequential Speed

Root causes

• PCIe running at x2 instead of x4

• Drive in chipset slot instead of CPU slot

• Older BIOS

Fix

• Check BIOS PCIe lane configuration

• Update BIOS firmware

• Move SSD to primary M.2 slot

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Issue: Poor 4K Performance

Root causes

• Incorrect NVMe driver

• Power plan throttling

• Background disk activity

Fix

powercfg /setactive SCHEME_MIN

• Switch to High Performance

• Use Microsoft Standard NVMe driver

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Issue: High Access Time

Root causes

• Thermal throttling

• SSD overheating

• Poor airflow

Fix

• Install M.2 heatsink

• Improve case airflow

• Monitor temps via SMART tools

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Issue: Score Drops After Long Usage

Root causes

• SLC cache exhaustion

• Drive nearly full

• Background garbage collection

Fix

• Keep ≥20% free space

• Leave system idle periodically

• Update SSD firmware

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Commands and Diagnostic Checks

Check NVMe Driver

Get-PnpDevice -FriendlyName "*NVMe*"

Check TRIM Status

fsutil behavior query DisableDeleteNotify

Expected output:

DisableDeleteNotify = 0

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Security Considerations and Risks

• Benchmarking causes high write amplification

• Frequent testing reduces SSD lifespan (TBW)

• Avoid benchmarks on:

  • Production servers

  • Forensic drives

  • Encrypted live volumes

• Ensure BitLocker recovery keys are backed up

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Best Practices and Recommendations

• Benchmark only after:

  • OS installation

  • Driver update

  • Firmware update

• Avoid repeated testing

• Use AS SSD alongside:

  • SMART monitoring tools

  • Real workload testing

• Document baseline scores for future comparison

• Monitor thermal behavior during benchmarks

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Conclusion

AS SSD Benchmark is a reliable diagnostic tool for validating NVMe SSD performance when interpreted correctly.
Understanding sequential speed, random I/O, latency, and score behavior allows IT professionals to:

• Identify configuration errors

• Detect hardware bottlenecks

• Validate SSD health

• Avoid false performance assumptions

Correct interpretation prevents unnecessary hardware replacement and ensures optimal system performance.

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