Sound Cards and Gaming Audio: Do You Need One in 2025?

Onboard Audio

Modern motherboards include onboard audio codecs — typically a Realtek ALC1200, ALC4080, or similar. These handle basic stereo and surround sound output through the 3.5mm jacks. Quality has improved significantly over the past decade.

When Onboard Audio Is Enough

For most gamers with headsets or speakers connected via USB or 3.5mm: onboard audio is sufficient. USB headsets bypass onboard audio entirely and use their own internal DAC/amp.

When a Dedicated Sound Card Helps

High-impedance headphones: Audiophile headphones like the Sennheiser HD 650 (300 Ohm) or Beyerdynamic DT 990 Pro (250 Ohm) need a proper amplifier to reach adequate listening volume and full dynamic range. Onboard audio cannot drive high-impedance headphones well. Analog noise: If you hear electrical interference, buzzing, or hiss through 3.5mm connected headphones, it is often CPU/GPU electrical noise coupling into the audio path. A dedicated sound card or external DAC/amp physically separates audio circuitry from the noisy motherboard. Surround sound processing: Gaming sound cards like the Sound BlasterX AE-5 Plus offer hardware virtual surround processing.

External DAC/Amp vs. PCIe Sound Card

An external USB DAC/amplifier (like the FiiO E10K, Schiit Magni/Modi stack, or Creative Sound BlasterX G6) is often preferred over a PCIe card because it sits outside the PC case away from electrical interference, and is portable between systems.

Spatial Audio in Games

Many games and headsets now offer software-based spatial audio (Windows Sonic, Dolby Atmos, DTS Headphone:X) that works with any stereo output. This is separate from hardware audio processing.