Prism HUD is a lightweight but detailed and accurate HUD(head-up display)-style system performance & resources monitor, which can help you always know what and how your system is performing.

General

Lightweight - Prism HUD is small and hardly uses any CPU time.
Accurate - Calculates real-time system performance & resources information precisely.
HUD (Head-up display) - You can know how your system is performing always.
Customizable - Each component can be turned on/off and each component's appearance can be changed.

CPU Prism

Monitors total CPU usage of your system. Where there are more than one logical CPU (e.g. multicore processor), the meter is segmented to show each core's portion in the load.

Memory Prism

Usage - Monitors total physical memory usage of your system.
Hard Faults - Monitors memory hard faults per second. A hard fault occurs when a process refers to data that is not in physical memory and thus requires disk access. It is a cause of system-wide delays. The prism monitors both disk-to-memory (left segment) and memory-to-disk operations (right segment).

Disk Prism

Usage - Monitors each disk's space usage.
Time - Monitors how busy each disk is.
IO - Monitors each disk's current read (left segment) and write operations (right segment) in Kbytes per second.

Network Prism

Monitors each network interface's current inbound (left segment) and outbound operations (right segment) in Kbytes per second.

Process Prism

CPU - Monitors each process's CPU usage.
Memory - Monitor each process's physical memory usage.
Page Faults - Monitors memory page faults caused by each process. This includes both hard faults and soft faults (memory operations).
IO - Monitors each process's IO read (left segment) and write operations (right segment).