You don't need *this* much power, but having a computer with 4+GB RAM and having a SATA HD with plenty of space does help. I'll post my PC specs when I get home, but this is the guide I used to help improve my techniques a bit. Still a work in progress:
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(The following is taken from the site:
Yogscast FAQ)
How do you record?
We record games in 1280x720 resolution and 30 frames per second (fps) using FRAPS and edit using a variety of video-editing software. All audio is recorded in Audacity or Ventrilo. Most of our recording is done live, although occasionally we fix a few bits of messy audio in post.
Video and audio are imported into Sony Vegas and edited together to create a compressed smaller video, (h.264, 2-pass VBR at 3-6mbps bitrate with audio in 128kbps 48khz AAC format), and then upload to Youtube.
For the Xbox, we use a Hauppauge HD PVR Recorder rigged up to a computer and Audacity recorder, then export it into editing software as above.
What are your PC specifications?
i7-2600k CPU@3.40GHz
GeForce GTX 590
1x128GB SSD Hard drive
2x2TB Hard drives
16GB Ram
Seinheiser PC 350 Headsets
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Using Fraps to capture both audio
and video was too much strain on it, and it caused a lot of audio / video lag. So separating them per program helps to divide up the load.