I shouldn't have to explain this too much. Basically, post your computer specifications. I've created a template which you can use:
CPU:
Motherboard:
Graphics card:
RAM:
Sound card:
Network card:
HDD:
Optical drives:
Floppy drive:
PSU:
OS:
Other:
System 1 - AWESOME-PC:
This was the first computer I bought with my own money back in late 2009.
CPU: Core2Duo E7400 2.8 GHz @ 3.0 GHz.
Motherboard: Asus P5KPL/1600.
Graphics card: Asus GeForce GTS250 1GB PCI-E.
Network card: TP-Link W951N wireless b/g/n.
RAM: 4GB DDR2-800.
HDD: 500GB SATA.
Optical drives: 22x SATA CD/DVD+/-R/RW/RAM reader/burner combo.
Floppy drive: Nope.
PSU: ATX PSU of unknown brand and wattage.
OS: Windows 7 Professional
System 2: BL-DEDI:
This one was recently put together out of scrap components which I recieved for free.
CPU: Intel Pentium IV HT 3.2 GHz.
Motherboard: Intel D865PERL.
Graphics card: Nvidia GeForce 6200A 256mb AGP.
RAM: 2GB (4x512mb) DDR-400.
Network card: TP-Link W951N wireless b/g/n.
HDD: 160GB (Seagate?) IDE.
Optical drives: 16x NEC IDE CD/DVD+/-R/RW/RAM reader/burner combo.
Floppy drive: 1.44mb.
PSU: Chaintech 400W.
OS: Windows XP Home Edition.
System 3:
This system first served it's purpose as a Blockland dedi, but now it doesn't really have any purpose.
CPU: Intel Celeron III Tualatin 1.2 GHz.
Motherboard: Shuttle AV18.
Graphics card: ATi Radeon 9200SE 128mb AGP.
RAM: 768mb (3x256mb) SDR PC-133.
Network card: Realtek RTL8185 wireless b/g.
HDD: 80GB Maxtor IDE.
Optical drives: 56x CD-reader.
Floppy drive: 1.44mb.
PSU: 400W.
OS: Windows XP Home Edition/Linux Lubuntu 9.10.
System 4:
This my primary retro gaming system.
CPU: Intel Pentium II 400MHz.
Motherboard: Asus V66XA.
Graphics card: ATi Rage Pro Turbo AGP (integrated)(yuck!)
RAM: 256mb (2x128mb) SDR PC-133.
Sound card: ESS ES1868 AudioDrive PnP.
Network card: Realtek RTL8185 wireless b/g.
HDD: 6GB IDE.
Optical drives: 32x CD-reader.
Floppy drive: 1.44mb.
PSU: 110w Siemens crap.
OS: Windows 98SE (KernelEx 4.5.1 + Revolutions Pack 9.7.1).
Useful tools for finding out about your components:
Dxdiag: Open your start menu, click "run", type "dxdiag", press enter and you're set!
CPU-Z - my favorite tool. There's also a version that works on Windows 98.
GPU-Z - A special utility to find out more about your graphics card.
AIDA64 - More extensive information, also has benchmarking features. Shareware.