# Memory access is too slow

**URL:** <https://forums.sifive.com/t/memory-access-is-too-slow/5018>\
**Category:** HiFive Unmatched\
**Created:** [July 28, 2021, 9:15am UTC](https://forums.sifive.com/t/memory-access-is-too-slow/5018 "2021-07-28T09:15:57Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![davidlt](https://avatars.discourse-cdn.com/v4/letter/d/e480ec/32.png) [@davidlt](https://forums.sifive.com/u/davidlt)\
**Post date:** [January 6, 2022, 7:58pm UTC](https://forums.sifive.com/t/memory-access-is-too-slow/5018/13 "2022-01-06T19:58:43Z")

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Both FU540 and FU740 are “slow” regarding bandwidth and latencies. This hasn’t change since the SoCs or/and boards were released. Also U74 cores used in FU740 do not container L2 prefetcher. That got available only in a newer releases on U74 cores.

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