Inversion gameplay amd 3800+ (single core) ati hd 4650 AGP HD

fps with fraps: 5-11(lagy sound) fps without fraps: 17-25-32(normal sound) PC System OS: Windows XP SP3 Motherboard : Asus a8v-mx CPU : Amd Athlon 3800+ 2,4Ghz (single core - no overlock) GPU : Ati hd 4650 1gb AGP (standart options - catalyst 12.4) RAM: 1 GB ddr1 400mhz HDD: 250 GB SATA + 250 GB IDE Game system Graphics: high Resolution: 1280x1024 Good things : Bad things :sometimes very lagy:/