Factsheet
What's the best (free) software for reporting what's in a computer? cpu specs, ram. hd, etc... gpu type, gpu ram...
either something i can screenshot or a report?
I'm looking for all in one software, that can do cpu and gpu, etc.
Videos
You can always use a bootable Linux USB drive (I recommend Ubuntu).
How to view the system specs in linux
Open terminal and type sudo dmidecode --type. Don't click Enter yet! after --type, you can write bios or system, etc. to view the related specs.
For example: sudo dmidecode --type bios will display the BIOS specs.
Complete list of "What can I write after --type" (common parameters are in bold):
- Memory
- BIOS
- System
- Base Board
- Chassis
- Processor
- Memory Controller
- Memory Module
- Cache
- Port Connector
- System Slots
- On Board Devices
- OEM Strings
- System Configuration Options
- BIOS Language
- Group Associations
- System Event Log
- Physical Memory Array
- Memory Device
- 32-bit Memory Error
- Memory Array Mapped Address
- Memory Device Mapped Address
- Built-in Pointing Device
- Portable Battery
- System Reset
- Hardware Security
- System Power Controls
- Voltage Probe
- Cooling Device
- Temperature Probe
- Electrical Current Probe
- Out-of-band Remote Access
- Boot Integrity Services
- System Boot
- 64-bit Memory Error
- Management Device
- Management Device Component
- Management Device Threshold Data
- Memory Channel
- IPMI Device
- Power Supply
You can burn an iso image of any Linux distribution, and use commands like:
lshw: Will give you a very comprehensive list of hardware and settings.lspci: Will show you most of your hardware in a nice quick way. It has varying levels of verbosity so you can get more information out of it with-vand-vvflags if you want it.dmidecode: as mentioned in answer of @matan129lscpu: List available cpus and their caracteristics.
HDT Project
HDT (stands for Hardware Detection Tool) is a Syslinux com32 module that displays low-level information for any x86 compatible system. It provides both a command line interface and a semi-graphical menu mode for browsing.

Project page: www.hdt-project.org
Download the file .iso (approximate size 1.3 mb) and burn on usb.