wɪðˌaʊt ɐn ˈaɪəmˌuː, ðɪ ˈɑːpɚɹˌeɪɾɪŋ sˈɪstəm wʊdhˌævtʊ ˈɪmplɪmənt tˈaɪmkənsˈuːmɪŋ bˈaʊns bˈʌfɚz ˈɔːlsoʊ nˈoʊn æz dˈʌbəl bˈʌfɚz.
Without an IOMMU, the operating system would have to implement time-consuming bounce buffers (also known as double buffers).