I'm confused about ddr4 memory chips, please help me.

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rasterduty

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Feb 29, 2016
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Hello; I am buying an Asus z170-ws board, and will need some new memory for it. The specifications on Asus site shows this.

4 x DIMM, Max. 64GB, DDR4 3733(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3333(O.C.)/3300(O.C.)/3200(O.C.)/3000(O.C.)
/2800(O.C.)/2666(O.C.)/2400(O.C.)/2133 MHz Non-ECC, Un-buffered Memory
Dual Channel Memory Architecture
Supports Intel® Extreme Memory Profile (XMP)
** Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
* Hyper DIMM support is subject to the physical characteristics of individual CPUs.

Most of the memory listed shows "O.C. after it, except for the 2133 This is what confuses me.
Is the 2133 the only standard clock memory for this board, and all the others with "O.C". will need to be overclocked? I don't want anything overclocked on this board. Or will any of the memory run at it's listed speed without having to be overclocked. I would LOVE to have the faster memory, but not if it can't run stock. Can anybody with knowledge about this straighten me out on this. The last time I built a computer was in 2006, and allot has changed since then, but i'm not into overclocking, as this will be a workstation board, and not for gaming.
Thanks for your help.
 
Solution
Tradesman1
The standard of 2133 is for the CPU and mobo at spec, based on Intel's position of the CPU running 2133 as it's spec data rate. All other data rates are over and above and may require the MC (memory controller) (and CPU) to have an OC to run the hher data rates. The DRAM you buy, say a 3000 set has been tested as a 3000 set so you aren't OCing it, you would be running it to it's spec. The (OC) designation many people equate to OCing the motherboard goes back to the older gens of mobos where the (say with socket 775) if you had a mobo with a FSB of 800 and wanted to OC the CPU or run 1066 DRAM, you had to raise the mobos FSB to 1066, which effectively OCed everything.

So to your question, it really depends more on the CPU than the...
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Tradesman1

Tradesman1

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Jun 5, 2013
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The standard of 2133 is for the CPU and mobo at spec, based on Intel's position of the CPU running 2133 as it's spec data rate. All other data rates are over and above and may require the MC (memory controller) (and CPU) to have an OC to run the hher data rates. The DRAM you buy, say a 3000 set has been tested as a 3000 set so you aren't OCing it, you would be running it to it's spec. The (OC) designation many people equate to OCing the motherboard goes back to the older gens of mobos where the (say with socket 775) if you had a mobo with a FSB of 800 and wanted to OC the CPU or run 1066 DRAM, you had to raise the mobos FSB to 1066, which effectively OCed everything.

So to your question, it really depends more on the CPU than the mobo, yes the mobo can handle say 3733, but it will be CPU that is the deciding factor, and they all differ as to their individual strength. i.e. many 6600K CPUs can easily handle 3200 DRAM at stock settings, other 6600Ks may have trouble running 2666 or 2800 DRAM. (Silicon lottery, same as how well an individual 6600K can OC, some, quite well with reasonable voltage, others are real dogs when it comes to OCing them)
 
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Solution
clutchc

clutchc

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If you are unsure of what to do, get the fastest RAM you can afford that your board supports. Leave it at the board's default settings so it runs at 2133 MHz. As you get more comfortable with the system, you can experiment with one of the other speed settings offered in BIOS.
 
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