I-Nex is a powerful alternative to other graphical system information utilities. The I-Nex system tool bundles a useful collection of device data in an easy-to-use interface. (Similar tools in the Linux space include utilities such as CPU-G and HardInfo.)
This is a firmware test suite that performs sanity checks on Intel/AMD PC firmware. It is intended to identify BIOS and ACPI errors and if appropriate it will try to explain the errors and give advice to help workaround or fix firmware bugs. It is primarily intended to be a Linux-centric firmware troubleshooting tool.
lshw (Hardware Lister) is a small tool to provide detailed information on the hardware configuration of the machine. It can report exact memory configuration, firmware version, mainboard configuration, CPU version and speed, cache configuration, bus speed, etc. on DMI-capable x86 or EFI (IA-64)
... [More] systems and on some PowerPC machines (PowerMac G4 is known to work). [Less]
This utility access almost all the computer hardware, including PCI (PCI Express), PCI Index/Data, Memory, Memory Index/Data, I/O Space, I/O Index/Data, Super I/O, Clock Generator, DIMM SPD, SMBus Device, CPU MSR Registers, ATA/ATAPI Identify Data, Disk Read Write, ACPI Tables Dump (include AML
... [More] decode), Embedded Controller, USB Information, SMBIOS Structures, PCI Option ROMs, MP Configuration Table, E820, EDID and Remote Access. And also a Command Window is provided to access hardware manually. [Less]