Manhattan 175357, 7.1 channels, Internal, 24 bit, PCI Manhattan 175357. Audio output channels: 7.1 channels, Audio quality: 24 bit. Host interface: PCI. Windows operating systems supported: Windows 2000, Windows 98, Windows ME. Minimum RAM: 128 MB, Minimum processor: 350 MHz. Weight: 85 g, Width: 134 mm, Depth: 121 mm