sˌʌm mˌaɪkɹoʊpɹˈɑːsɛsɚz ɪnðə nˈaɪntiːnhˈʌndɹɪd nˈaɪnti z, sˈʌtʃ ɐz ðə dˌiːˌiːsˈiː ˈælfə twˈɛnti wˈʌn θˈaʊzənd sˈɪksti sˈɪks ænd ˌeɪtʃpˈiː pˌiːˈeɪ sˈɛvən θˈaʊzənd θɹˈiːhˈʌndɹɪd ˌɛlsˈiː, hæd ˈɪntᵻɡɹˌeɪɾᵻd mˈɛmɚɹi kəntɹˈoʊlɚz; haʊˈɛvɚ, ɹˈæðɚ ðɐn fɔːɹ pɚfˈoːɹməns ɡˈeɪnz, ðɪs wʌz ˈɪmplɪməntᵻd tə ɹᵻdˈuːs ðə kˈɔst ʌv sˈɪstəmz baɪ ᵻlˈɪmᵻnˌeɪɾɪŋ ðə nˈiːd fɚɹən ɛkstˈɜːnəl mˈɛmɚɹi kəntɹˈoʊlɚ.
Some microprocessors in the 1990s, such as the DEC Alpha 21066 and HP PA-7300LC, had integrated memory controllers; however, rather than for performance gains, this was implemented to reduce the cost of systems by eliminating the need for an external memory controller.