What does the MHz of RAM really mean?
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Track title: Hypnotic Puzzle3
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Chapters
00:00 What Does The Mhz Of Ram Really Mean?
00:53 Accepted Answer Score 16
01:41 Thank you
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Full question
https://superuser.com/questions/736381/w...
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Tags
#memory #cpu #speed
#avk47
Rise to the top 3% as a developer or hire one of them at Toptal: https://topt.al/25cXVn
--------------------------------------------------
Music by Eric Matyas
https://www.soundimage.org
Track title: Hypnotic Puzzle3
--
Chapters
00:00 What Does The Mhz Of Ram Really Mean?
00:53 Accepted Answer Score 16
01:41 Thank you
--
Full question
https://superuser.com/questions/736381/w...
--
Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...
--
Tags
#memory #cpu #speed
#avk47
ACCEPTED ANSWER
Score 16
Yes, it's the maximum number of clock cycles per second that the RAM operates on. With Double Data Rate (DDR) RAM, it actually communicates twice per cycle. So for DDR:
200 MHz clock rate × 2 (for DDR, 1 for SDR) × 8 Bytes = 3,200 MB/s bandwidth
This is why chips are now named for their bandwidth, not their frequency alone. Above chip module is called PC-3200, not 200 Mhz. It's still necessary to know the clock rate, to ensure that the motherboard/CPU can operate at that clock.
See the Wikipedia article on DDR SDRAM for more information.