BIOS und UEFI – nur 1 und 0? [KE]

Was ist BIOS?

Das Basic Input Output System ist das Fundament eines Rechners. Hier findet der erste Schritt der Magie statt.

BIOS ist die Software zur Hardwareverwaltung, denn das BIOS wird vor jedem Systemstart ausgeführt. Es wird überprüft ob die Hardware intakt ist, ob alles angeschlossen ist für einen Systemstart und ob ein Betriebssystem vorhanden ist.

Nach der Prüfung wird das System gestartet.


bis zu 32 Bit System:

Jeder hat schon ein mal das BIOS oder zumindest die Auswahloptionen von einem BIOS gesehen. Bei jedem Neustart wird ein Logo eingeblendet mit den F2-Hinweis für Bootwechsel. (Taste kann variieren)

Was ist UEFI?


Unified Extensible Firmware Interface ist der geistige Nachfolger von BIOS. Der eigentliche Nachfolger ist der Firmware Foundation Code. Jede Firmware ist genormt damit UEFI läuft.

Somit ist UEFI nicht mehr Teil der Firmware. Es ist die Schnittstelle zwischen Firmware und dem Betriebssystem.


stark vereinfachte Darstellung von 64-Bit Systemen:


Was macht UEFI besser/mehr?


  • einfacher erweiterbar (z. B. für Digital Rights Management)
  • eingebettetes Netzwerkmodul (zur Fernwartung)
  • bessere Unterstützung für starke Grafikkarten
  • BIOS-Emulation (bei Bedarf)
  • unabhängige Treiber möglich
  • Netzwerk- und Speicherverwaltung auf der Firmware möglich
  • Speichermedien über 2 TB verwendbar
  • Menüführung in UEFI mit Maus möglich


Ist das die Zukunft?

Nein, es ist die Gegenwart. Jeder moderne Rechner hat UEFI, welches meistens bei den Kauf des Gesamtpaketes oder dem Kauf des Mainboards bereits enthalten ist.


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