ðɪs dˈiːkɹiːsᵻz ðə nˈʌmbɚɹ ʌvðə wˈaɪɚz nˈɛsᵻsɚɹi tə plˈeɪs ðə mˈɛmɚɹi dɪvˈaɪsᵻz ˌɔn ɐ mˈʌðɚbˌoːɹd ɐlˈaʊɪŋ fɚɹə smˈɔːlɚ nˈʌmbɚɹ ʌv lˈeɪɚz təbi jˈuːzd, mˈiːnɪŋ mˈoːɹ mˈɛmɚɹi dɪvˈaɪsᵻz kæn biː plˈeɪst ˌɔn ɐ sˈɪŋɡəl bˈoːɹd, æt ðɪ ɛkspˈɛns ʌv ɪŋkɹˈiːsɪŋ lˈeɪtənsi ðə tˈaɪm nˈɛsᵻsɚɹi tʊ ˈæksɛs ɐ mˈɛmɚɹi loʊkˈeɪʃən.
This decreases the number of the wires necessary to place the memory devices on a motherboard (allowing for a smaller number of layers to be used, meaning more memory devices can be placed on a single board), at the expense of increasing latency (the time necessary to access a memory location).