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Why Underclocking RAM ?

davemon50
Level 11
In the timings table for RAM chips it lists several JEDEC specs for lower frequencies. Is there any reason why anyone would underclock their RAM? I have never read about people doing this, just wondering why you would, if there's some tangible benefit for some application. Any of you experts know the answer to this?
Davemon50
523 Views
3 REPLIES 3

Korth
Level 14
For troubleshooting the RAM, CPU, or motherboard. *A rarely needed capability, but vitally important when needed.

For increased compatibility. *Especially when using mixed RAM types, or different CPU/motherboard, or hardware with DMA to RAM. *JEDEC always guaranteed to work unless memory is faulty or misconfigured.

For boot, POST, EFI, etc, maximum reliability and stability when initializing hardware and firmware. *Maximum (and/or nonstandard) memory performance iis not needed before an OS is executed.
Power savings. *Admittedly very little power, but stretching (low) battery life or minimizing heat ouput can be important on mobile systems. *More important than a performance parameter which has little impact on many computing tasks.*
"All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others." - Douglas Adams

[/Korth]

davemon50
Level 11
Mixing RAM, that makes sense. Power savings does seem a poor solution, better savings elsewhere, but the mixing RAM does make sense. Looks like a quote, that yours? 🙂
Davemon50

Korth
Level 14
Not a quote, lol. The text oddities are actually browser bugs I haven't figured out yet. Painstakingly typed that response while visiting the forums through a Chromium running on my nifty little ASUS Tinkerboard!

Don't discount hardware with DMA to RAM. This basically means (older) server-tech cards which occupy PCIe/PCI slots and have very strict (proprietary or kinda antiquated) RAM addressing/timing requirements - or cards installed through high-latency risers - these all tend to have their own executable firmware/BIOS which support interfacing to JEDECs and not much else.

I do like to be quoted. You can quote me on that. 😄
"All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others." - Douglas Adams

[/Korth]