HWiNFO64 is the most comprehensive hardware monitoring tool available for Windows. It reads hundreds of sensors that Task Manager and even GPU-Z miss — including VRM temperatures, individual core voltages, SSD health, fan speeds, and power draw. This guide walks through setting it up for effective real-time monitoring and logging.

Download and Setup

Download from hwinfo.com — use the portable version for no-install use
Run HWiNFO64.exe
Check Sensors-only on startup to go directly to the sensor panel
Click Start to begin reading all hardware sensors

The sensors window opens with rows grouped by component: CPU, Motherboard, GPU, Storage, Network.

Understanding the Sensor Layout

HWiNFO64 shows three columns per sensor: Value (current), Min, and Max.

Key sensors to watch:

CPU sensors

CPU Package Power: total CPU power draw (TDP)
CPU Core Temps: per-core temperatures
CPU CCD1/CCD2 Temps (AMD): die-level temps, usually 5–10°C above core temps
CPU Tctl/Tdie: AMD’s reported temperature (Tctl offsets vary by CPU)
Core Voltage: should be stable; excessive vdroop indicates power delivery issues

GPU sensors

GPU Temperature: keep under 85°C for longevity (80°C is a good target)
GPU Hot Spot Temperature: junction/hotspot, always higher than core temp; under 100°C is fine
GPU Memory Temperature: GDDR6X VRAM runs hot — 100°C+ is normal for RTX 40-series
GPU Power: compare to your card’s TDP (e.g., RTX 4090 = 450W)
GPU Core Clock: watch for throttling (clock drops under load = thermal or power limit)

Storage sensors

Drive Temperature: HDDs under 45°C; SSDs under 70°C
SSD Wear Level / Drive Remaining Life: health percentage

Customizing the Sensor Layout

The default layout dumps every sensor with no organization. Customize it:

Right-click any sensor → Rename to give it a descriptive name
Right-click → Hide to remove unimportant sensors from view
Drag sensors to reorder them
Right-click any value → Change Limits to set warning thresholds (values turn yellow/red when exceeded)

Save your custom layout: right-click anywhere → Save User Layout. HWiNFO64 remembers it on next launch.

Integrating with RTSS (On-Screen Display)

RTSS (RivaTuner Statistics Server, included with MSI Afterburner) overlays HWiNFO64 data on your game screen.

Install MSI Afterburner (installs RTSS automatically)
In HWiNFO64 → Settings → Integration tab
Check Enable reporting to OSD Server (RTSS)
Select sensors to show in the OSD: right-click sensor → Show value in OSD

In RTSS, make sure the overlay is enabled (On button). Your sensors now appear during gameplay — typically CPU temp, GPU temp, GPU usage, FPS, and VRAM usage.

Logging Sensor Data

Long-duration logging is useful for finding thermal throttle points or power limit hits during benchmarks:

In the Sensors window → Start logging button (floppy disk icon) or Ctrl+L
Choose a CSV save location
Run your workload/game
Stop logging and open the CSV in Excel or LibreOffice Calc

Plot GPU temperature and clock speed over time — if the clock drops while temperature rises, you’ve found a thermal throttle point.

Finding Thermal Throttle

Signs of CPU thermal throttling in HWiNFO64:

CPU Core Temp hitting 100°C (Intel) or 95°C (AMD)
CPU Effective Clock dropping below rated boost speed
CPU Package Power dropping suddenly (power limit throttle)
Thermal Throttling sensor showing “Yes”

GPU throttle signs:

GPU temp hitting the set temperature limit (usually 83–84°C on NVIDIA)
GPU Memory Junction temp exceeding limit
GPU Throttle Reason sensor showing “Thermal” or “Power”

For troubleshooting forums, export a summary:

File → Save Summary — generates a text file with all current sensor values perfect for pasting in support threads.

HWiNFO64 vs Alternatives

Tool	Best For
HWiNFO64	Deepest sensor coverage, logging
GPU-Z	GPU-specific deep info
CPU-Z	CPU/RAM detailed specs
MSI Afterburner	Gaming OSD + fan curve control
AIDA64	Stress testing + sensors

HWiNFO64 is the gold standard for passive monitoring. Pair it with Afterburner for fan control and RTSS for in-game OSD, and you have complete hardware visibility at all times.