A USB DAC is worthwhile for entry-level streaming only when the computer output is noisy, too weak for the headphones or lacks a convenient monitoring connection. It does not improve microphone capture unless the device also includes a compatible audio input. Many beginners can start with onboard audio.
Separate listening from capture
Map the audio path from microphone to streaming software and from the PC to headphones. A pure DAC handles playback. An audio interface may add microphone preamps, direct monitoring and input gain, which are different requirements. Check the ports and functions instead of buying from the broad audio label.
No USB-DAC model or verified price appears in the supplied product facts. For capture, the HyperX SoloCast 2 USB microphone is listed at R690 and the NearStream USB and XLR microphone at R676. These products do not replace a DAC; they are useful references for a simple or expandable microphone path.
Record a private stream and listen for hiss, delay, weak headphone level and background noise. Try a known-good headset and update drivers before adding hardware. If playback is clean and monitoring works, spend first on microphone placement, room noise, lighting or PC stability. Add a DAC only when testing identifies a playback problem that its confirmed outputs and power can solve.
Building a first stream audio path? > Compare Evetech microphones by connection, pickup pattern, controls and mounting.