
On my machine, the driver uses up to 10% of the CPU just to play MP3s. It sounds like you have the same RealTek ALC655 sound chipset on that motherboard that I do, and it's one of the worst ones as far as CPU usage goes. You might want to try throwing the Audigy in anyway. I tried all of the available sound settings, and all of the available hardware acceleration settings in the control panel, but nothing helped. I had problems with the sound, but not the ones you describe- crackling and popping in the voice tracks, and cutscenes fading out before the person was done talking. I have virtually the same system as you, except for the amount of RAM and HD size.
Sound card: Sound card with DirectX 9.Sound problems seem to be common with this game.
Hard disk: 915 MB of free hard disk space (+ 635 MB if the video card does NOT support DirectX texture compression). DirectX version: Microsoft DirectX® 9.0. Graphics: 64 (+) MB video card with DirectX 9.0 compatible drivers (“GeForce 3” / “Radeon 8500” or better with DirectX texture compression support). Memory: 1.55 GB of free hard disk space (+ 635 MB if the video card does NOT support DirectX texture compression).
Processor: Intel Pentium IV or AMD Athlon XP processor 256 (+) MB RAM.
You must have at least an Intel Pentium 4 and at least a GeForce 3 or Radeon 8500 graphics card with 64 MB of VRAM. If you want to play the game with high settings, you need slightly better equipment. GTA Vice City: (Link available after 5 hours) Download GTA Vice City Steam Version Grand Theft Auto: Vice City’s recommended computer requirements
Turn OFF Frame Limiter and you will get 60FPS and Above. This game is from STEAM, so don’t worry. Few graphics improved, looks like Original GTA Vc but few roads testures are improved and it will wont low your FPS runs good in low end pc. All cut-scences available in this game, All game,peds,vehicle radio,music,character sounds are available. Mouse fixed in this game, you can play without any mouse issue, its working fine. To download GTA Vice city original steam version for free on your pc then you must click the download link below that you can download it directly without any ads and without any issues. It uses a modified version of the Renderware gaming engine used by GTA III, and similarly represents a vast urban landscape full of inhabited buildings (from hotels to skyscrapers), vehicles (cars, motorcycles, boats, helicopters, and planes), and people.